单项选择题

某网络的IP地址空间为192.168.9.0/24，采用定长子网划分，子网掩码为255.255.255.224，则可划分出的子网数量、每个子网内可分配地址数量分别是

A．8, 32
B．8, 30
C．32, 6
D．30, 8

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单项选择题

法国的拉维莱特公园是谁的作品?（）。
A. 赖特

B. 密斯

C. 安藤忠雄

D. 屈米

单项选择题

[ * ] A four hole pattern has size limits of Φ10.7-11.0 and a position tolerance to a datum reference frame of Φ0.3 at MMC. Its mating pin pattern has size limits of Φ9.7-10.0,and its positioned to a representative set of datums. How much position tolerance is available for the pins within the pin pattern at MMC?

A．Φ0.7
B．Φ1.0
C．Φ0.5
D．Φ0.4