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某软件项目的活动图如下图所示，其中顶点表示项目里程碑，链接顶点的边表示包含的活动，变色数字表示活动的持续时间（天）。完成该项目的最少时间为（）天。

某软件项目的活动图如下图所示，其中顶点表示项目里程碑，链接顶点的边表示包含的活动，变色数字表示活动的持续时间（天）。由于某种原因，现在需要同一个开发人员完成BC和BD，则完成该项目的最少时间为（）天。

计算机系统的层次结构如下圈所示，基于硬件之上的软件可分为a、b和c三个层次。图中a、b和c分别表示（）。

下图所示的PCB（进程控制块）的组织方式是（）。

下图所示的PCB（进程控制块）中（）。

某操作系统采用分页存储管理方式，下图给出了进程A和进程B的页表结构。如果物理页的大小为lK字节，那么进程A中逻辑地址为1024（十进制）用变量存放在（）号物理内存页中。

某操作系统采用分页存储管理方式，下图给出了进程A和进程B的页表结构。假设进程A的逻辑页4与进程B的逻辑页5要共享物理页4，那么应该在进程A页表的逻辑页4和进程B页表的逻辑页5对应的物理页处分别填（）。

用自盒测试方法对如下图所示的流程图进行测试。若要满足分支覆盖，则至少要（）个测试用例。

用自盒测试方法对如下图所示的流程图进行测试。若要满足分支覆盖，正确的测试用例对是（）（测试用例的格式为（A，B，X；X））。

如图所示的UML类图中，Shop和Magazine之间为（）关系。

如图所示的UML类图中，Magazine和Page之间为（）关系。

如图所示的UML类图中，UML类图统称不用于对（）进行建模。

自动售货机根据库存、存放货币量、找零能力、所选项目等不同，在货币存入并进行选择时具有如下行为：交付产品不找零：交付产品找零：存入货币不足而不提供任何产品；库存不足而不提供任何产品。这一业务需求适合采用（）模式设计实现，其类图如下图所示。

自动售货机根据库存、存放货币量、找零能力、所选项目等不同，在货币存入并进行选择时具有如下行为：交付产品不找零：交付产品找零：存入货币不足而不提供任何产品；库存不足而不提供任何产品。类图如下图所示，其中（）是客户程序使用的主要接口，可用状态来对其进行配置。

自动售货机根据库存、存放货币量、找零能力、所选项目等不同，在货币存入并进行选择时具有如下行为：交付产品不找零：交付产品找零：存入货币不足而不提供任何产品；库存不足而不提供任何产品。类图如下图所示，此模式为（）。

自动售货机根据库存、存放货币量、找零能力、所选项目等不同，在货币存入并进行选择时具有如下行为：交付产品不找零：交付产品找零：存入货币不足而不提供任何产品；库存不足而不提供任何产品。类图如下图所示，体现的最主要的意图是（）。

某确定的有限自动机（DFA）的状态转换图如下图所示（0是初态，4是终态），则该DFA能识别（）。

函数main、f的定义如下所示。调用函数f时，第一个参数采用传值（call by value）方式，第二个参数采用传引用（call by referen）方式，则函数main执行后输出的值为（）。

求解两个长度为n的序列X和Y的一个最长公共序列（如序列ABCBDAB和BDCABA的一个最长公共子序列为BCBA）可以采用多种计算方法。经分析发现该问题具有最优子序列，可以定义序列成都分别为i和j的两个序列X和Y的最长公共子序列的成都为C[I，j]，如下式所示。采用自底向上的方法实现该算法，则时间复杂度为（）。

完形填空：下面的短文有5处空白，请根据短文内容为每处空白确定一个最佳选项。
The development of the Semantic Web proceeds in steps， each step building a layer on top of another. The pragmatic justification for this approach is that it is easier to achieve （71） on small steps， whereas it is much harder to get everyone on board if too much is attempted. Usually there are several research groups moving in different directions； this （72） of ideas is a major driving force for scientific progress. However， from an engineering perspective there is a need to standardize. So， if most researchers agree on certain issues and disagree on others， it makes sense to fix the point of agreement. This way， even if the more ambitious research efforts should fai1， there wil1 be at least（73） positive outcomes. Once a （74） has been established ， many more groups and companies will adopt it， instead of waiting to see which of the alternative research lines will be successful in the end. The nature of the Semantic  Web is such that companies and single users must build tools， add content，and use that content. We cannot wait until the full Semantic Web vision materializes-it may take another ten years for it to be realized to its full（75） （as envisioned today， of course）.

完形填空：下面的短文有5处空白，请根据短文内容为每处空白确定一个最佳选项。
The development of the Semantic Web proceeds in steps， each step building a layer on top of another. The pragmatic justification for this approach is that it is easier to achieve （71） on small steps， whereas it is much harder to get everyone on board if too much is attempted. Usually there are several research groups moving in different directions； this （72） of ideas is a major driving force for scientific progress. However， from an engineering perspective there is a need to standardize. So， if most researchers agree on certain issues and disagree on others， it makes sense to fix the point of agreement. This way， even if the more ambitious research efforts should fai1， there wil1 be at least（73） positive outcomes. Once a （74） has been established ， many more groups and companies will adopt it， instead of waiting to see which of the alternative research lines will be successful in the end. The nature of the Semantic Web is such that companies and single users must build tools， add content，and use that content. We cannot wait until the full Semantic Web vision materializes-it may take another ten years for it to be realized to its full（75） （as envisioned today， of course）.

完形填空：下面的短文有5处空白，请根据短文内容为每处空白确定一个最佳选项。
The development of the Semantic Web proceeds in steps， each step building a layer on top of another. The pragmatic justification for this approach is that it is easier to achieve （71） on small steps， whereas it is much harder to get everyone on board if too much is attempted. Usually there are several research groups moving in different directions； this （72） of ideas is a major driving force for scientific progress. However， from an engineering perspective there is a need to standardize. So， if most researchers agree on certain issues and disagree on others， it makes sense to fix the point of agreement. This way， even if the more ambitious research efforts should fai1， there wil1 be at least（73） positive outcomes. Once a （74） has been established ， many more groups and companies will adopt it， instead of waiting to see which of the alternative research lines will be successful in the end. The nature of the Semantic Web is such that companies and single users must build tools， add content，and use that content. We cannot wait until the full Semantic Web vision materializes-it may take another ten years for it to be realized to its full（75） （as envisioned today， of course）.

完形填空：下面的短文有5处空白，请根据短文内容为每处空白确定一个最佳选项。
The development of the Semantic Web proceeds in steps， each step building a layer on top of another. The pragmatic justification for this approach is that it is easier to achieve （71） on small steps， whereas it is much harder to get everyone on board if too much is attempted. Usually there are several research groups moving in different directions； this （72） of ideas is a major driving force for scientific progress. However， from an engineering perspective there is a need to standardize. So， if most researchers agree on certain issues and disagree on others， it makes sense to fix the point of agreement. This way， even if the more ambitious research efforts should fai1， there wil1 be at least（73） positive outcomes. Once a （74） has been established ， many more groups and companies will adopt it， instead of waiting to see which of the alternative research lines will be successful in the end. The nature of the Semantic Web is such that companies and single users must build tools， add content，and use that content. We cannot wait until the full Semantic Web vision materializes-it may take another ten years for it to be realized to its full（75） （as envisioned today， of course）.

完形填空：下面的短文有5处空白，请根据短文内容为每处空白确定一个最佳选项。
The development of the Semantic Web proceeds in steps， each step building a layer on top of another. The pragmatic justification for this approach is that it is easier to achieve （71） on small steps， whereas it is much harder to get everyone on board if too much is attempted. Usually there are several research groups moving in different directions； this （72） of ideas is a major driving force for scientific progress. However， from an engineering perspective there is a need to standardize. So， if most researchers agree on certain issues and disagree on others， it makes sense to fix the point of agreement. This way， even if the more ambitious research efforts should fai1， there wil1 be at least（73） positive outcomes. Once a （74） has been established ， many more groups and companies will adopt it， instead of waiting to see which of the alternative research lines will be successful in the end. The nature of the Semantic Web is such that companies and single users must build tools， add content，and use that content. We cannot wait until the full Semantic Web vision materializes-it may take another ten years for it to be realized to its full（75） （as envisioned today， of course）.