根据句意及首字母提示完成单词。

1. We are m______ school students.

2. "Please s______ down," said the teacher.

3. Mr. Wang knows Australia well, because he is a g______ teacher.

4. Did you see the talk show "Y______, Today and Tomorrow"?

5. Alice s______ an exciting movie last Sunday.

实验室安全管理实行哪种管理？（）

A.校、（院）系、实验室三级管理

B.校、（院）系两级管理

C.院（系）、实验室两级管理

D.实验事自行管理