使用消毒液应注意（）。A、消毒只是多种预防措施中的一种 B、消毒是唯一的预防措施 C

选出一个与所给句子中划线部分意思相近的词语。

1. Tom has learned over 500 Chinese words.

A. about      

B. nearly

C. more than    

D. less than

2. Please join the two parts together.

A. put      

B. pull

C. push    

D. get

3. He lived in that building all his life.

A. for many years  

B. since he was born

C. with his wife    

D. all the time

4. It's 1995. We have known each other since 1990.

A. since five years    

B. for 1990

C. five years ago    

D. for five years

5. I'm a teacher. I've been at this school for ten years.

A. lived        

B. stayed

C. studied      

D. taught

索-膜结构

简述马斯洛娃被涅赫柳多夫抛弃沦落妓院的经过。

食管破裂可有（）

A.皮下气肿

B.纵隔气肿

C.两者均有

D.两者均无

RAM具有的特点是

A．海量存储

B．存储的信息可以永久保存

C．一旦断电，存储在其上的信息将全部消失无法恢复

D．存储在其中的数据不能改写