目前我国央企重组、地方国企整合的步伐正在明显加快。至2009年8月，已有77家央

词语辨析.

A. add up／add to／add up to

1. Five ____ seven makes twelve.

2. The pupils are too young to ____ these figures.

3. The amount of money he makes a month ____ more than 59 000 dollars.

B. calm／still／silent

4. After the storm the sea became ____ again.

5. Keep ____. I am taking a photo of you.

6. Don't keep ____ on bad behavior.

C. too much／much too

7. Never drink ____, for it is bad for your health.

8. The question is ____ difficult for me. Would you please help me out?

烧水的锅炉内形成水垢的原因是（　　）

A．水中含有大量的不溶性杂质

B．该地区的水是软水

C．水中含有较多可溶性钙和镁的化合物

D．该地区的水是硬水

下列不属于用药禁忌的是

A.配伍禁忌

B.妊娠禁忌

C.不合理用药

D.服药禁忌

下列各项中，具有"走息道以行呼吸，贯心脉以行气血"功能的气是（）

A.元气

B.宗气

C.营气

D.卫气

E.胃气

塑料模的合模导向装臵主要有导柱导向和锥面定位，通常用（）。