第7题: [单项选择]When does the train leave A. It leaves at 10:05. B. It leaves at 10:45. B. It leaves at 10:35. 参考答案:C 答案解析:[解析] M: What time does your train leave W: It leaves at 10:35. Q: When does the train sta
A. 128.14.32.0~128.14.32.255 B. 128.14.32.0~128.14.47.0 C. 128.14.31.0~128.14.47.255 D. 128.14.32.0~128.14.47.255 参考答案:D 答案解析:[分析] CIDR使用各种长度的“网络前缀”来代替分类地址中的网络号和子网号,而不是像分类地址中只能使用1字节、2字节、3字节长的网络号。CIDR还使用“斜线记法”,它又称为CIDR记法——“/网络前