子网屏蔽码为( )位二进制数值。
A.4
B.8
C.与IP地址中网络号长度相同
D.32
参考答案:D
解析: 子网屏蔽码是32位二进制数值,分别对应IP地址的32位二进制数值。
At the railway station, the mother waved goodbye to her daughter until the train was _______. [ ]
A. out of sight
B. out of reach
C. out of order
D. out of place
柔韧素质测定方法有立位体前屈、引体向上等。