《史记》三家注

阅读短文，回答问题。

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

dog is the most useful animal in the world, but the reason why one keeps a dog has changed. Once upon a time, a man met a dog and wanted it to help him in the fight against other animals, and he found that the dog listened

to him and did what he told to. Later people used dogs for the hunting of other animals, and the dogs did not eat what they got until their master agreed. So dogs were used for driving sheep and guarding chickens.

       But now the people in the towns and cities do not need dogs to fight against other animals. Of course 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 his 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. ____ are more useful than a dog in the world. [ ]

A. No other animals

B. Some animals

C. Many animals

D. Few animals

2. In the past people kept dogs because dogs ____. [ ]

A. could fight

B. met the people

C. did not eat other animals

D. helped and listened to people

3. Now people keep dogs in the cities because dogs ____. [ ]

A. fight against other animals

B. are lonely

C. are like their friends

D. are afraid of the 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. remain a good friend

由公共低压配电网配电的照明负荷，（）A以上应采用三相四线配电。

A、100

B、50

C、30

D、20

男性，15岁。室间隔缺损，持续高热4天。查体：胸骨左缘第3、4肋间可触及收缩期震颤，肝未触及，脾左肋下2cm，质软，无压痛。该患者最可能的诊断是（）

A.肝炎

B.伤寒

C.疟疾

D.败血症

E.感染性心内膜炎

头痛宁胶囊中土茯苓的传统功效（）

A.健脾利湿，杜生痰之源

B.补肝肾

C.熄风除痰

D.行经络、止疼痛

钻进过程中，以下（）不是发生溢流的预兆。

A.钻井液池体积增加

B.泵冲数减小

C.泵压下降

D.出口流速增加