在建工程作业场所的临时疏散通道应采用不燃、难燃材料建造，对其耐火极限和净宽度分别是如

足厥阴肝经的荥穴是()
足厥阴肝经的输穴是()

A.大敦

B.行间

C.曲泉

D.太冲

E.中都

根据口诀各写出两道乘法算式。

二三得六(    )(    )          三四十二(    )(    )

根据汉语提示或英语解释，写出各单词的正确形式，每空填一词。

1. It is about 9 years since Hong Kong's _____ (coming back) to China.

2. Something should be done to protect the _____ (环境) in our hometown.

3. Can you _____ (描述) what he looks like?

4. The writer wrote the workers' _____ (everyday) lives in the book.

5. There is a robot _____ (展览) in the hall.

6. Now the student has _____ (get to know and understand something) that he was wrong.

7. He is very young, but he has a rich _____ (知识) of computers.

8. Beijing is the second biggest city and the _____ (文化的) centre of China.

装车前，检查铁路槽车（）是否完好有效，否则不装车。

A、铅封口

B、呼吸阀

C、栏杆

D、罐盖拉手

宫南、（）是天津古代金融业的中心。