问题 问答题 简答题

计算机分那几类?各有什么特点?

答案

参考答案:

传统上分为三类:大型主机、小型机、微型机。大型主机一般为高性能的并行处理系统,存储容量大,事物处理能力强,可为众多用户提供服务。小型机具有一定的数据处理能力,提供一定用户规模的信息服务,作为部门的信息服务中心。微型机一般指在办公室或家庭的桌面或可移动的计算系统,体积小、价格低、具有工业化标准体系结构,兼容性好。

阅读理解

阅读理解。

     It was getting late. There was no noise in the forest. We could only hear the birds singing. And then,

a bear-a big brown bear-came into the forest.

     The bear stopped under a tall tree. He was very hungry. He looked up into the tree. There in the nut

tree was his supper-a supper of nice nuts. But the nuts were high up in the tree. The hungry  bear  could

not reach them. But he knew how to get his supper. He climbed up the tree.

     Up and up he climbed. He climbed onto a big branch of the tree. He sat there  and  then shook(摇)

the branch again and again. At last the branch broke. The brown bear fell down  with  the branch  and

nuts.

     The bear sat up and looked around. With his big paws he picked up the nuts and ate them up.

1.How did the brown bear get his supper?                  

A. He climbed up the tree and ate the nuts there.

B. He shook the apples off a tree and ate them.

C. He picked up the nuts on the ground and ate them.

D. He fell down with the branch of the tree. Then he took the nuts and ate them.

2.The bear was         .

A. black        

B. brown    

C. black and white    

D. brown and black

3.The story took place          .

A. in the morning  

B. at noon

C. before evening ca        

D. at midnight

4.The word "branch" in this passage means          in Chinese.

A. 树干        

B. 树叶        

C. 树枝            

D. 树桩

5.Where did the bear eat the nuts?

A. in a forest.  

B. outside the forest.

C. near a forest.  

D. in front of the forest.

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