储蓄的概念、本质和特征。

阅读理解。

       One day, a little monkey and a little fox (狐狸) went out to play. They saw an apple tree on the other

  side (边) of the river. There were many big and red apples on it. But there was no bridge (桥) over the

  river. The monkey thought hard and had an idea. They pulled down (拉倒) a tree and put it over the

  river as a bridge.

       The monkey said, "My old friend, you go there first." But after the fox went to the other side, he

  kicked (踢) the tree into the river and ran to the apple tree. "How can I get there without the tree?" cried

  the monkey. The fox laughed and said, "You just stand there and watch me eating the apples." The

  monkey was very angry.

       Suddenly it began to rain. The water level (水位) in the river rose (上涨) and tree flew away with the

   water.

       "You can eat all the apples. But you can't come back," shouted the monkey.

       The fox stopped eating and looked at the monkey sadly.

1. The little monkey and the little fox wanted to _____ on the other side of the river.

A. build a bridge        

B. eat the apples        

C. pull down a tree

2. The fox kicked the tree into the river because he wanted to _____.

A. eat all the apples by himself        

B. share the apples with the monkey    

C. get the apples first

3. The fox could not come back because _____.

A. the monkey had taken away the tree  

B. the tree had flown away

C. it began to rain

4. The fox was sad because _____.

A. the monkey was laughing

B. he couldn't reach the apples

C. he couldn't come back

5. The story tells us that _____.

A. the fox shouldn't go first          

B. the monkey should go first

C. one shouldn't care only about himself

线绕式异步电动机采用串级调速可以实现（）。

A、分级调速

B、无级调速

C、机械特性变软

D、电路简单化

炉膛“全部燃料失去”保护动作的条件为：同时满足（有火记忆、全部磨煤机停（）、燃油母管快关阀关或全部油枪油角阀关（））。

中药处方中，直接写药物的正名或制（炙）时，即付酒制的是（）

A.山茱萸

B.麦芽

C.狗肾

D.牵牛子

E.五灵脂

铁水预处理脱硫剂石灰的主要成分是（）。

A.CaO

B.CaC₂

C.Na₂CO₃

D.Mg