TEPT

可用于淋证的药是（）。

A.蒲公英

B.连翘

C.穿心莲

D.栀子

E.鱼腥草

选择适当的不定代词填空。

1. Very _____ of them came to last night's meeting. ( little, few)

2. He wrote few letters to _____ of his family, but he sent  a few cards to _____ of his f'riends.

 ( any, some)

3. If _____ calls, tell him I am busy. ( anyone, someone)

4. My sister gave me two pictures. One is the Great Wall, the _____ is the Ming Tombs. ( another, other)

5. The mother has three sons. _____ of them are teachers. ( both, all)

6. John and Mary have _____ won prizes. ( both, all)

7. The coat is too big. Please show me _____. (other,  another)

如果有p就一定有q，但是有q不一定有p，那么p是q的什么条件（）？

A、必要条件

B、充要条件

C、充分条件

D、既不充分也不必要

简述发光二极管的工作原理？

工班个体呼吸性粉尘检测：其他工作面或作业场所（）测定1次。

A、每3个月

B、每半年

C、每天

D、每月