气开式调节阀是有气源（），无气源（）的调节阀。A、开、关 B、开、开 C、关、关 D、关、

选词填空。

look the same，look after，look at，look like，put…on，to go ,at work , in the hat ,

very much ,go to bed

1. He bought a jacket and _________.

2.It's time _________ to school.

3. Lily and Lucy _________.

4.He is too old to _________ himself.

5.The boy _________ is Tom.

6. They are, _________ now. Don't go in.

7. I like it __________.

8. I usually __________ at eleven in the evening.

9. These cats __________ some hats.

10. The teacher asked Jim to _________ the blackboard.

某校对全校1200名男女学生进行健康调查，选用分层抽样法抽取一个容量为200的样本．已知女生抽了85人，则该校的男生数应是______人．

能抑制囊泡摄取功能的抗高血压药是（）

A.哌唑嗪

B.普萘洛尔

C.卡托普利

D.硝苯地平

E.利血平

根据我国证券交易规则规定，企业信用必须在A级以上才有资格向社会公开发行债券。(　　)

皮疹高出皮肤，时现时隐，搔之连片，此为（）

A.阳斑

B.阴斑

C.麻疹

D.风疹

E.隐疹