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问题 单项选择题

图6-3给出了不同类型IPSec数据包的封装示意图。其中，______工作在传输模式；______支持报文加密服务。


A．a.和b.
B．a.和c.
C．c.和d.
D．b.和d.

答案

参考答案：A

单项选择题 A1型题

手三阴经的循行走向是（）

A.从胸走手

B.从腹走手

C.从手走头

D.从头走足

E.从足走腹
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写作题

You are finding it more and more difficult to communicate with your dad / mom, because

1. he / she can’ t understand you when sometimes you say “你已经out了”, “今天我们去FB一下吧” and so on;

2. he / she sometimes checks your cellphone or schoolbag, trying to find something secret belonging to you;

3. when you fail in an exam, he / she scolds (责备) more than comforts and encourages you.

根据上面提示用英语给你的爸爸或妈妈写一封信，反映你现在的心情，说说你的想法和希望。（任选以上一个原因、两个原因或三个原因进行陈述均可。）

词数120左右。（开头和结尾已为你写好，不计入总词数。）

Dear Dad / Mom,

I love you, so I’ m writing to                                            

                                                                           

                                                                         

I would be very happy if you could accept my advice.
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