第3题: [单项选择]无线局域网需要实现移动结点的哪几层功能 Ⅰ.物理层 Ⅱ.数据链路层 Ⅲ.网络层 A. Ⅰ和Ⅱ B. Ⅰ、Ⅱ和Ⅲ C. Ⅰ和Ⅲ D. Ⅱ和Ⅲ 参考答案:A 答案解析:[解析] 无线局域网是实现移动计算机网络的关键技术之一。它以微波、激光、红外线等无线电波来部分或全部代替有线局域网中的电缆、双绞线和光纤,实现了移动计算网络中移动结点的物理层与数据链路层功能,构成无线
第35题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. The man is very rich. B. He really enjoys buying books. C. The woman works in the university. D. That he wants to learn about applying for a loan. 参考答案:B 答案解析:[听力原文] M: I haven’t got enough money. Wily are books so expensive I can’t afford any of them.