问题 问答题 简答题

20头FDY当同一位的一个计量泵电机过载跳停,另一个是否可以启动?为什么?

答案

参考答案:

不能,20头FDY纺位要保证同一位的两个计量泵同时启动和停止,两个电机热保护继电器的常闭触头串接在启动回路中,当一个过载另一个会立即停止。

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选。

     Health is the most important thing in the world. Nothing is more important than health. If one takes

away our money, houses, cars, or even our clothes, we can still survive__1__That is why we always try to eat in a healthy way and exercise regularly.

     How can we keep healthy? In order to eat healthily, I usually avoid eating food high in fat, like French

fries or cookies, which are junk foods__2__Besides, I only eat little meat.

__3__ Taking exercise every day helps us build a strong body. Regular exercise is an important part of

keeping me healthy.

     What's more, I think friends are an important part of one's health__4__I always feel better when I am

with friends than when I am alone. When I am with my friends, I always laugh. Laughing is also an

important part of health. It is good to stay with my friends.

     By eating properly and exercising regularly, I can keep my body at a proper weight and keep healthy. By spending time with my friends, I can keep my mind as well as my body happy. These things sound easy to do, but not many people can manage them__5__

A. Many studies show- that people with a narrow range of social contacts often get sick.

B. There, are some people who like staying alone, but they keep healthy.

C. On the other hand, doing exercise is very important.

D. But if our health was taken away, it is certain that we would surely die.

E. I think a strong will is necessary if we want to keep healthy.

F. I eat a lot of vegetables and fresh trust fruit which are full of vitamins.

G. Some people appear fat because they often eat too much.

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