第2题: [多项选择]下面对PPP协议的描述正确的是:() A. 不需要数据必须是规定字符集,对任何一种比特流,均可以实现透明的传输 B. 物理层可以是同步电路或异步电路 C. 具有各种NCP协议,可以承载多种网络层协议 D. 具有验证协议,更好的保证了网络的安全性 E. 是在SLIP的基础上发展起来的 参考答案:B,C,D,E
第11题: [单项选择]{{B}} Passage One
Questions 26 to 28 are based on the passage you have just heard.{{/B}} A. They play against each other in order to get the best score. B. They want to get some exercises. C. They want to win a prize. D. They want to keep a score. 参考答案:A 答案解析:[听力原文]26-28
There are two main kinds of sports. The two kinds of sports are team sports and indi
第16题: [单项选择]Where does the conversation take place A. At a drug store. B. In a supermarket. C. At the dentist’s. D. At the police station. 参考答案:C 答案解析:[听力原文]
M: Open your mouth widely. I think we need to take it out.
W: Will it be painful
M: it wi