4. 你应该做一件值得你尽最大努力的工作。
A. You should do a job that’s worthy of you the best efforts.
B. You should do a job that’s worthy of your best effort.
C. You should do a job that’s worthy in your best efforts.
D. You should do a job that’s worthy of your best efforts.
5. 离婚不是一件能轻易忘却的事情。
A. Divorce is not something that is easy to get over.
B. Divorce is not a thing that is easy to over.
C. Divorce is not something which is easy to get over.
Divorce is not easy to forget.
P53 F. Complete the sentences with expressions from the boxes. (注意答案中应该去掉单词的首字母)
两级放大器中各级的电压增益分别是20dB 和 40dB 时,总的电压增益为( )
A. 60dB
B. 80dB
C. 800dB
D. 20dB