当采用轴肩做轴向定位时,为了使轴上零件能靠紧定位面,轴肩根部的圆角半径应()零件的倒

题型:单项选择题

问题:

当采用轴肩做轴向定位时,为了使轴上零件能靠紧定位面,轴肩根部的圆角半径应()零件的倒角

A.大于

B.小于

C.等于

D.以上都不对

考点:机械设计基础机械设计基础题库
题型:单项选择题

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项。

Health is the most important thing in the world. Nothing is more important than health. If we take away our money, houses, cars or even our clothes, we can still survive.   小题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.   小题2:  I eat a lot of vegetables and fresh fruit which are full of vitamins.

  小题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.   小题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.    小题5:  

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

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

C.Many studies show that people with a range of social contacts don’t get sick.

D.But if our health was taken away, it is certain that we would surely die.E.I only eat little meat.

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

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

题型:单项选择题

百日维新中,光绪皇帝颁布的政令要求裁减旧式绿营兵,改练()

A.新式海军

B.新式陆军

C.新式炮兵

D.新式骑兵

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楼面布草洗送工作繁杂时怎么办?

题型:单项选择题

卡文迪什实验室第一任主任是谁?()

A、卡文迪什

B、麦克斯韦

C、狄拉克

D、牛顿

题型:单项选择题

ZN28-10型真空开关真空度应小于等于()

A.1.33×10﹣2Pa

B.2.33×10﹣2Pa

C.3.33×10﹣2Pa

D.4.33×10﹣2Pa

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