问题 单项选择题

下列()作为潜油电机机组过载保护或短路保护的一种简单有效措施。

A.真空接触器

B.熔断器

C.电源开关

D.控制电源变压器

答案

参考答案:B

阅读理解

阅读理解。

     Your body, which has close relations with the food you eat,

is the most important thing you own, so it needs proper treatment

and proper nourishment (营养). The old saying"An apple a day

keeps the doctor away. "is not as silly as some people think. The

body needs fruits and vegetables because they contain vitamin C.

Many people take extra vitamins in pill form (丸剂) ,  believing

that these will make them healthy. But a good diet is made up of

nourishing food and this gives all the vitamins you need.  The body

doesn't need or use extra vitamins, so why waste money on them?

     In the modern western world, many people are too busy to

bother about eating properly. They throw away the good habits and

throw anything into their stomachs, eating hurriedly and

carelessly. The illnesses caused or made worse by bad, eating

habits are frightening.

1. From the first sentence we know that ____.   

A. the more you eat,the better you will feel

B. your body is made up of the food you eat

C. what you eat has great effect on your health

D. all kinds of food you eat can be made into your nourishment

2. How do you understand the old saying underlined in Paragraph 1? 

A. Doctors are no longer necessary if we eat an apple every day.

B. Eating apples regularly brings lots of benefits to our health.

C. The apple is the best among all kinds of fruits.

D. Eating apple is a good way to cure illnesses.

3. In modern western countries, ____.   

A. people are only too busy to cook meals for themselves

B. people don't want to pay more attention to their eating

C. people throw everything into their stomachs without digestion

D. lots of people's illnesses are caused or made worse by bad eating habits

4. If we want to keep healthy,we should _____ .   

A. eat properly

B. only eat an apple a day

C. take as many vitamin pills as possible

D. throw everything into our stomachs slowly and carefully

问答题 简答题