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设T是正则二叉树，有6个叶子结点，那么树T的高度最多可以是 (1) ；最小可以是 (2) ；树T的内结点数是 (3) 。如果T又是Huffman最优树，且每个叶子结点的权分别是1，2，3，45，5，6，则最优树T的非叶子结点的权之和是 (4) ；权为1的叶子结点的高度是 (5) 。(注：树的根结点高度为1)

设T是正则二叉树，有6个叶子结点，那么树T的高度最多可以是 (1) ；最小可以是 (2) ；树T的内结点数是 (3) 。如果T又是Huffman最优树，且每个叶子结点的权分别是1，2，3，45，5，6，则最优树T的非叶子结点的权之和是 (4) ；权为1的叶子结点的高度是 (5) 。(注：树的根结点高度为1)

设T是正则二叉树，有6个叶子结点，那么树T的高度最多可以是 (1) ；最小可以是 (2) ；树T的内结点数是 (3) 。如果T又是Huffman最优树，且每个叶子结点的权分别是1，2，3，45，5，6，则最优树T的非叶子结点的权之和是 (4) ；权为1的叶子结点的高度是 (5) 。(注：树的根结点高度为1)

设T是正则二叉树，有6个叶子结点，那么树T的高度最多可以是 (1) ；最小可以是 (2) ；树T的内结点数是 (3) 。如果T又是Huffman最优树，且每个叶子结点的权分别是1，2，3，45，5，6，则最优树T的非叶子结点的权之和是 (4) ；权为1的叶子结点的高度是 (5) 。(注：树的根结点高度为1)

设T是正则二叉树，有6个叶子结点，那么树T的高度最多可以是 (1) ；最小可以是 (2) ；树T的内结点数是 (3) 。如果T又是Huffman最优树，且每个叶子结点的权分别是1，2，3，45，5，6，则最优树T的非叶子结点的权之和是 (4) ；权为1的叶子结点的高度是 (5) 。(注：树的根结点高度为1)

The CPU does not have to look (6) all of RAM to find the spot it needs. But RAM only (7) the data temporarily. As soon as you switch the computer (8) , all that information disappears from the RAM. When you switch the computer on again, the RAM is (9) , and ready (10) a new program and new data.

The CPU does not have to look (6) all of RAM to find the spot it needs. But RAM only (7) the data temporarily. As soon as you switch the computer (8) , all that information disappears from the RAM. When you switch the computer on again, the RAM is (9) , and ready (10) a new program and new data.

The CPU does not have to look (6) all of RAM to find the spot it needs. But RAM only (7) the data temporarily. As soon as you switch the computer (8) , all that information disappears from the RAM. When you switch the computer on again, the RAM is (9) , and ready (10) a new program and new data.

The CPU does not have to look (6) all of RAM to find the spot it needs. But RAM only (7) the data temporarily. As soon as you switch the computer (8) , all that information disappears from the RAM. When you switch the computer on again, the RAM is (9) , and ready (10) a new program and new data.

The CPU does not have to look (6) all of RAM to find the spot it needs. But RAM only (7) the data temporarily. As soon as you switch the computer (8) , all that information disappears from the RAM. When you switch the computer on again, the RAM is (9) , and ready (10) a new program and new data.

某工作站采用时钟频率f为15MHz，处理速率为10MIP/S的处理机来执行一个已知混合程序。假定每次存储器存取为1周期延迟，此计算机的有效CPI是 (33) ，假定将处理机的时钟频率，厂提高到30MHz，但存储器子系统速率不变。这样，每次存储器存取需要两个时钟周期，如果30%指令每条只需要一次存储存取，而另外5%每条需要两次存储存取，还假定已知混合程序的指令数不变，并与原工作站兼容，则改进后的处理机性自 (34) 。

表示实体类型及实体间联系的模型称为数据模型，其中关系模型主要特征是用 (43) 表示实体集， (44) 表示实体间联系。关系运算以关系代数为理论基础，关系代数的最基本操作是并、差、笛卡尔积、 (45) 。完整性规则提供了一种手段来保证当授权用户对数据库作修改时不会破坏数据的一致性。关系模型的完整性规则是对关系的某种约束条件，其中参照完整性要求 (46) 。假设关系R的属性F是关系S的外码，在对关系R和S的操作中，不可能破坏参照完整性的是 (47) 。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

从下列叙述中选出5条正确的叙述，并把编号按从小到大次序排列，它们是 (51) 、 (52) 、 (53) 、 (54) 、 (55) 。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

5英寸磁盘，最小磁道的直径为4厘米，最大磁道直径为8厘米，每分钟10000转，共有20记录面，每个记录面有8000个磁道，每条磁道上有511个扇区，每个扇区实际记录有600个字节，其中有效数据为512个字节。则这个磁盘存储器的有效存储容量是 (6) GB，磁道密度是每毫米 (7) 条磁道。

设有关系模式S(Sno，Sname，Pno，Pname，Q，A)表示销售员销售商品情况，其中各属性的含义是：Sno为销售员员工号，Sname为销售员姓名，Pno为商品号，Pname为商品名称，Q为销售商品数目，A为销售商品总金额。根据定义有如下函数依赖集：P=sno→Sname，Sno→Q，Sno→A，Pno→Pname
关系模式S的关键字是 (38) ，W的规范化程度最高达到 (39) 。若将关系模式S分解为3个关系模式S1(Sno，Sname，Q，A)，S2(Sno，Pno，Pname)，则S1的规范化程度最高达到 (40) ，S2的规范化程度最高达到 (41) 。
SQL中集合成员资格的比较操作“元组IN(集合)”中的“IN”与 (42) 操作符等价。

需要一个16MB×8位的存储器，现有存储芯片为1MB×8位。则需要 (2) 个存储器芯片。存储器芯片的地址长度需要 (3) 位，主存储器的地址长度需要 (4) 位。

表示实体类型及实体间联系的模型称为数据模型，其中关系模型主要特征是用 (43) 表示实体集， (44) 表示实体间联系。关系运算以关系代数为理论基础，关系代数的最基本操作是并、差、笛卡尔积、 (45) 。完整性规则提供了一种手段来保证当授权用户对数据库作修改时不会破坏数据的一致性。关系模型的完整性规则是对关系的某种约束条件，其中参照完整性要求 (46) 。假设关系R的属性F是关系S的外码，在对关系R和S的操作中，不可能破坏参照完整性的是 (47) 。

某工作站采用时钟频率f为15MHz，处理速率为10MIP/S的处理机来执行一个已知混合程序。假定每次存储器存取为1周期延迟，此计算机的有效CPI是 (33) ，假定将处理机的时钟频率，厂提高到30MHz，但存储器子系统速率不变。这样，每次存储器存取需要两个时钟周期，如果30%指令每条只需要一次存储存取，而另外5%每条需要两次存储存取，还假定已知混合程序的指令数不变，并与原工作站兼容，则改进后的处理机性自 (34) 。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

从下列叙述中选出5条正确的叙述，并把编号按从小到大次序排列，它们是 (51) 、 (52) 、 (53) 、 (54) 、 (55) 。

5英寸磁盘，最小磁道的直径为4厘米，最大磁道直径为8厘米，每分钟10000转，共有20记录面，每个记录面有8000个磁道，每条磁道上有511个扇区，每个扇区实际记录有600个字节，其中有效数据为512个字节。则这个磁盘存储器的有效存储容量是 (6) GB，磁道密度是每毫米 (7) 条磁道。

设有关系模式S(Sno，Sname，Pno，Pname，Q，A)表示销售员销售商品情况，其中各属性的含义是：Sno为销售员员工号，Sname为销售员姓名，Pno为商品号，Pname为商品名称，Q为销售商品数目，A为销售商品总金额。根据定义有如下函数依赖集：P=sno→Sname，Sno→Q，Sno→A，Pno→Pname
关系模式S的关键字是 (38) ，W的规范化程度最高达到 (39) 。若将关系模式S分解为3个关系模式S1(Sno，Sname，Q，A)，S2(Sno，Pno，Pname)，则S1的规范化程度最高达到 (40) ，S2的规范化程度最高达到 (41) 。
SQL中集合成员资格的比较操作“元组IN(集合)”中的“IN”与 (42) 操作符等价。

多媒体计算机中的媒体信息是指 (24) ，多媒体技术的主要特性有 (25) 。目前音频卡具备的功能有 (26) 。在多媒体计算机中常用的图像输入设备是 (27) ，国际标准MPEG-2采用了分层的编码体系，提供了4种技术，它们是 (28) 。

需要一个16MB×8位的存储器，现有存储芯片为1MB×8位。则需要 (2) 个存储器芯片。存储器芯片的地址长度需要 (3) 位，主存储器的地址长度需要 (4) 位。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

死锁产生的必要条件之一是 (48) ，引起这种情况的主要原因是对资源采取 (49) 的方法。但是，如果采取 (50) 的方法，会使资源利用率降低。

表示实体类型及实体间联系的模型称为数据模型，其中关系模型主要特征是用 (43) 表示实体集， (44) 表示实体间联系。关系运算以关系代数为理论基础，关系代数的最基本操作是并、差、笛卡尔积、 (45) 。完整性规则提供了一种手段来保证当授权用户对数据库作修改时不会破坏数据的一致性。关系模型的完整性规则是对关系的某种约束条件，其中参照完整性要求 (46) 。假设关系R的属性F是关系S的外码，在对关系R和S的操作中，不可能破坏参照完整性的是 (47) 。

从下列叙述中选出5条正确的叙述，并把编号按从小到大次序排列，它们是 (51) 、 (52) 、 (53) 、 (54) 、 (55) 。

需要一个16MB×8位的存储器，现有存储芯片为1MB×8位。则需要 (2) 个存储器芯片。存储器芯片的地址长度需要 (3) 位，主存储器的地址长度需要 (4) 位。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

根据乔姆斯基于20世纪50年代建立的形式语言的理论体系，语言的文法被分为 4种类型，即0型(短语文法)，1型(上下有关文法)、2型(上F文无关文法)和3型(正规文法)。其中，2型文法与 (56) 等价，所以有足够的能力描述多数现今程序设计的语言的句法结构。一个非确定的有限自动机必存在一个与之等价 (57) 。从文法描述语言的能力来说， (58) 最强， (59) 最弱，山4类文法的定义可知： (60) 必是2型文法。

死锁产生的必要条件之一是 (48) ，引起这种情况的主要原因是对资源采取 (49) 的方法。但是，如果采取 (50) 的方法，会使资源利用率降低。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

表示实体类型及实体间联系的模型称为数据模型，其中关系模型主要特征是用 (43) 表示实体集， (44) 表示实体间联系。关系运算以关系代数为理论基础，关系代数的最基本操作是并、差、笛卡尔积、 (45) 。完整性规则提供了一种手段来保证当授权用户对数据库作修改时不会破坏数据的一致性。关系模型的完整性规则是对关系的某种约束条件，其中参照完整性要求 (46) 。假设关系R的属性F是关系S的外码，在对关系R和S的操作中，不可能破坏参照完整性的是 (47) 。

从下列叙述中选出5条正确的叙述，并把编号按从小到大次序排列，它们是 (51) 、 (52) 、 (53) 、 (54) 、 (55) 。

设有关系模式S(Sno，Sname，Pno，Pname，Q，A)表示销售员销售商品情况，其中各属性的含义是：Sno为销售员员工号，Sname为销售员姓名，Pno为商品号，Pname为商品名称，Q为销售商品数目，A为销售商品总金额。根据定义有如下函数依赖集：P=sno→Sname，Sno→Q，Sno→A，Pno→Pname
关系模式S的关键字是 (38) ，W的规范化程度最高达到 (39) 。若将关系模式S分解为3个关系模式S1(Sno，Sname，Q，A)，S2(Sno，Pno，Pname)，则S1的规范化程度最高达到 (40) ，S2的规范化程度最高达到 (41) 。
SQL中集合成员资格的比较操作“元组IN(集合)”中的“IN”与 (42) 操作符等价。

多媒体计算机中的媒体信息是指 (24) ，多媒体技术的主要特性有 (25) 。目前音频卡具备的功能有 (26) 。在多媒体计算机中常用的图像输入设备是 (27) ，国际标准MPEG-2采用了分层的编码体系，提供了4种技术，它们是 (28) 。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

死锁产生的必要条件之一是 (48) ，引起这种情况的主要原因是对资源采取 (49) 的方法。但是，如果采取 (50) 的方法，会使资源利用率降低。

表示实体类型及实体间联系的模型称为数据模型，其中关系模型主要特征是用 (43) 表示实体集， (44) 表示实体间联系。关系运算以关系代数为理论基础，关系代数的最基本操作是并、差、笛卡尔积、 (45) 。完整性规则提供了一种手段来保证当授权用户对数据库作修改时不会破坏数据的一致性。关系模型的完整性规则是对关系的某种约束条件，其中参照完整性要求 (46) 。假设关系R的属性F是关系S的外码，在对关系R和S的操作中，不可能破坏参照完整性的是 (47) 。

(8) 是将系统化的、规范的、可定量的方法应用于软件的开发、运行和维护的过程，它包括方法、工具和过程3个要素。ISO9000是由ISO/TCl76制定的关于 (9) 和质量保证的国际标准。CMM提供了一个框架，将软件过程改进的进化步骤组织成5个成熟度等级。除第1级外，每个等级都包含了实现该成熟度等级目标的若干 (10) 。在软件开发的各种资源中， (11) 是最重要的资源。软件的复杂性是 (12) ，它引起人员通信困难、开发费用超支、开发时间超时等问题。

根据乔姆斯基于20世纪50年代建立的形式语言的理论体系，语言的文法被分为 4种类型，即0型(短语文法)，1型(上下有关文法)、2型(上F文无关文法)和3型(正规文法)。其中，2型文法与 (56) 等价，所以有足够的能力描述多数现今程序设计的语言的句法结构。一个非确定的有限自动机必存在一个与之等价 (57) 。从文法描述语言的能力来说， (58) 最强， (59) 最弱，山4类文法的定义可知： (60) 必是2型文法。

从下列叙述中选出5条正确的叙述，并把编号按从小到大次序排列，它们是 (51) 、 (52) 、 (53) 、 (54) 、 (55) 。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

设有关系模式S(Sno，Sname，Pno，Pname，Q，A)表示销售员销售商品情况，其中各属性的含义是：Sno为销售员员工号，Sname为销售员姓名，Pno为商品号，Pname为商品名称，Q为销售商品数目，A为销售商品总金额。根据定义有如下函数依赖集：P=sno→Sname，Sno→Q，Sno→A，Pno→Pname
关系模式S的关键字是 (38) ，W的规范化程度最高达到 (39) 。若将关系模式S分解为3个关系模式S1(Sno，Sname，Q，A)，S2(Sno，Pno，Pname)，则S1的规范化程度最高达到 (40) ，S2的规范化程度最高达到 (41) 。
SQL中集合成员资格的比较操作“元组IN(集合)”中的“IN”与 (42) 操作符等价。

根据乔姆斯基于20世纪50年代建立的形式语言的理论体系，语言的文法被分为 4种类型，即0型(短语文法)，1型(上下有关文法)、2型(上F文无关文法)和3型(正规文法)。其中，2型文法与 (56) 等价，所以有足够的能力描述多数现今程序设计的语言的句法结构。一个非确定的有限自动机必存在一个与之等价 (57) 。从文法描述语言的能力来说， (58) 最强， (59) 最弱，山4类文法的定义可知： (60) 必是2型文法。

(8) 是将系统化的、规范的、可定量的方法应用于软件的开发、运行和维护的过程，它包括方法、工具和过程3个要素。ISO9000是由ISO/TCl76制定的关于 (9) 和质量保证的国际标准。CMM提供了一个框架，将软件过程改进的进化步骤组织成5个成熟度等级。除第1级外，每个等级都包含了实现该成熟度等级目标的若干 (10) 。在软件开发的各种资源中， (11) 是最重要的资源。软件的复杂性是 (12) ，它引起人员通信困难、开发费用超支、开发时间超时等问题。

多媒体计算机中的媒体信息是指 (24) ，多媒体技术的主要特性有 (25) 。目前音频卡具备的功能有 (26) 。在多媒体计算机中常用的图像输入设备是 (27) ，国际标准MPEG-2采用了分层的编码体系，提供了4种技术，它们是 (28) 。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

根据乔姆斯基于20世纪50年代建立的形式语言的理论体系，语言的文法被分为 4种类型，即0型(短语文法)，1型(上下有关文法)、2型(上F文无关文法)和3型(正规文法)。其中，2型文法与 (56) 等价，所以有足够的能力描述多数现今程序设计的语言的句法结构。一个非确定的有限自动机必存在一个与之等价 (57) 。从文法描述语言的能力来说， (58) 最强， (59) 最弱，山4类文法的定义可知： (60) 必是2型文法。

根据乔姆斯基于20世纪50年代建立的形式语言的理论体系，语言的文法被分为 4种类型，即0型(短语文法)，1型(上下有关文法)、2型(上F文无关文法)和3型(正规文法)。其中，2型文法与 (56) 等价，所以有足够的能力描述多数现今程序设计的语言的句法结构。一个非确定的有限自动机必存在一个与之等价 (57) 。从文法描述语言的能力来说， (58) 最强， (59) 最弱，山4类文法的定义可知： (60) 必是2型文法。

(8) 是将系统化的、规范的、可定量的方法应用于软件的开发、运行和维护的过程，它包括方法、工具和过程3个要素。ISO9000是由ISO/TCl76制定的关于 (9) 和质量保证的国际标准。CMM提供了一个框架，将软件过程改进的进化步骤组织成5个成熟度等级。除第1级外，每个等级都包含了实现该成熟度等级目标的若干 (10) 。在软件开发的各种资源中， (11) 是最重要的资源。软件的复杂性是 (12) ，它引起人员通信困难、开发费用超支、开发时间超时等问题。

多媒体计算机中的媒体信息是指 (24) ，多媒体技术的主要特性有 (25) 。目前音频卡具备的功能有 (26) 。在多媒体计算机中常用的图像输入设备是 (27) ，国际标准MPEG-2采用了分层的编码体系，提供了4种技术，它们是 (28) 。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

设有关系模式S(Sno，Sname，Pno，Pname，Q，A)表示销售员销售商品情况，其中各属性的含义是：Sno为销售员员工号，Sname为销售员姓名，Pno为商品号，Pname为商品名称，Q为销售商品数目，A为销售商品总金额。根据定义有如下函数依赖集：P=sno→Sname，Sno→Q，Sno→A，Pno→Pname
关系模式S的关键字是 (38) ，W的规范化程度最高达到 (39) 。若将关系模式S分解为3个关系模式S1(Sno，Sname，Q，A)，S2(Sno，Pno，Pname)，则S1的规范化程度最高达到 (40) ，S2的规范化程度最高达到 (41) 。
SQL中集合成员资格的比较操作“元组IN(集合)”中的“IN”与 (42) 操作符等价。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

多媒体计算机中的媒体信息是指 (24) ，多媒体技术的主要特性有 (25) 。目前音频卡具备的功能有 (26) 。在多媒体计算机中常用的图像输入设备是 (27) ，国际标准MPEG-2采用了分层的编码体系，提供了4种技术，它们是 (28) 。

(8) 是将系统化的、规范的、可定量的方法应用于软件的开发、运行和维护的过程，它包括方法、工具和过程3个要素。ISO9000是由ISO/TCl76制定的关于 (9) 和质量保证的国际标准。CMM提供了一个框架，将软件过程改进的进化步骤组织成5个成熟度等级。除第1级外，每个等级都包含了实现该成熟度等级目标的若干 (10) 。在软件开发的各种资源中， (11) 是最重要的资源。软件的复杂性是 (12) ，它引起人员通信困难、开发费用超支、开发时间超时等问题。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

(8) 是将系统化的、规范的、可定量的方法应用于软件的开发、运行和维护的过程，它包括方法、工具和过程3个要素。ISO9000是由ISO/TCl76制定的关于 (9) 和质量保证的国际标准。CMM提供了一个框架，将软件过程改进的进化步骤组织成5个成熟度等级。除第1级外，每个等级都包含了实现该成熟度等级目标的若干 (10) 。在软件开发的各种资源中， (11) 是最重要的资源。软件的复杂性是 (12) ，它引起人员通信困难、开发费用超支、开发时间超时等问题。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

下面是关于树和线性结构的描述：
线性结构存在惟一的没有前驱的 (14) ，树存在惟一的没有前驱的 (15) ；线性结构存在惟一的没有后继的 (16) ，树存在多个没有后继的 (17) ；线性结构其余元素均存在 (18) ，树其余结点均存在 (19) 。
由此可见，由于线性结构是一个 (20) 结构，元素之间存在的是 (21) 的关系，而树是一个 (22) 结构，元素之间存在的是 (23) 的关系。

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.
It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .
It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.