问题 问答题 简答题

电除尘采用高频电源的优点?

答案

参考答案:(1)可以较大幅度地提高除尘效率:

(2)高效节能:

(3)体积小、重量轻:

(4)提高运行电压,并可有效抑制反电晕:

(5)火花控制特性好:

(6)绿色电源.

选择题
阅读理解

阅读理解。

     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 fruit which are full of vitamins.

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