按照国际商会《UCP600》的解释，所有的信用证都应该为（）。A．

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问题单项选择题

按照国际商会《UCP600》的解释，所有的信用证都应该为（）。

A．可撤销信用证

B．不可撤销信用证

C．既可能是可撤销信用证，也可能是不可撤销信用证

D．由开证行和受益人协商确定

答案

参考答案：B

填空题

用since 和for 填空。

1. The German teacher has worked in China _____ quite a few years.

2. Dick has worked as a taxi driver _____ about ten years.

3. Helen has worked as a shop assistant _____ 1992.

4. We have studied English _____ about five years.

5. They have studied French _____ 1990.

6. Hans has made a lot of friends _____ he came to China.

7. _____ last January, the city has developed its telephone services swiftly.

8. I have been a Youth League Member (青年团员) _____ two years.

单项选择题 A1型题

含生物碱类成分药物常用何辅料炮制（）

A.黄酒、米醋

B.盐水、蜂蜜

C.麦麸、灶心土

D.蛤粉、滑石粉

E.银花、黑豆