问题 判断题

在机械加工中,为了保证加工可靠性,工序余量留得过多比留得太少好。

答案

参考答案:错

阅读理解

阅读理解

     If you are in a town in a western country, you'll often see people walking with their dogs. It is still

true that a dog is one of the most useful animals in the world, but the reason that one keeps a dog has

changed. Long, long ago, a man met a dog and wanted it to help him fight other animals and he found

that the dog listened to him and did what he told it to. Later people used dogs for hunting for other

animals, and the dog didn't eat what they got until their master agreed. So dogs were used for driving

sheep and guarding chickens. But now people in the towns and cities do not need dogs to fight other

animals. They keep them to frighten thieves, but the most important reason is that people feel lonely in

the city. For a child, a dog is the best friend when he has no friends to play with. For a young wife, a

dog is her child when she doesn't have her own. For old people, a dog is also a child when their real

children have grown up and left. Now people do not have to use a dog, but they keep it as a friend,

just like a member of the family.

1. In western countries some people still think __________ are more useful than a dog.

A. many animals

B. a few animals

C. some animals

D. no other animals

2. In the past, people kept dogs because dogs __________.

A. didn't eat other animals

B. helped and listened to people

C. met the people

D. frightened thieves

3. Now people in cities keep dogs because dogs __________.

A. fight other animals

B. are like their friends

C. are lonely

D. are afraid of thieves

4. A dog can be __________.

A. a child's friend only

B. a young woman's son

C. old people's real child

D. everybody's friend

5. So a dog will __________ in a family.

A. always be used

B. not be useful

C. still fight

D. be a good friend

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