试论述托运人提供保函要求签发清洁提单的情形以及法律效力。

既能固精缩尿，又能涩肠止泻的药物为（）

A．金樱子

B．覆盆子

C．桑螵蛸

D．鸡内金

根据汉语意思完成单词。

1. we may get a headache when we can't get _____ (足够的)sleep.

2. Jane is a young girl, but she's very _____ (勇敢的)

3. LiMing _____ (讨厌) to play with those bad boys

4. You shouldn't work on the______(因特网)too long

5. Water is _____ (必要的)for us.

If you have _____ problem, you can ask the policeman for help.[ ]

A. a

B. an

C. the

D. /

汉译英：“加尔各答”，正确的翻译为( )。

A．Chicago

B．Cagliari

C．Calcutta

D．Cartagena