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问题 单项选择题

到岸价格用字母( )表示。

A．FOB

B．BOF

C．CIF

D．FIC

答案

参考答案：C

填空题
选词填空。
ought to;      cut down;      tell a lie;      put on weight;      before long;
lose weight;      in debt;      earn one's living;      glare at;      get away with
1. They ______ damaging the car.
2. One ______ not ______ cross the street against the traffic rules.
3. The workers are doing all they can to ______ the accident rate.
4. She ______ because she was on a diet.
5. He is heavily ______.
6. I'll see the film ______.
7. The teacher ______ by teaching.
8. Tom was very angry and ______ me.
9. She ______ a lot of ______ last winter.
10. Don't ______ when you are late for school.
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单项选择题

NO2的日平均浓度数据统计的有效性是每天至少有（）的采样时间。

A.12h

B.16h

C.18h

D.14h
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