什么叫电力系统?对电力系统运行有哪些基本要求?

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问题:

什么叫电力系统?对电力系统运行有哪些基本要求?

考点:电气运行工考试电气运行工(高级)电气运行工(高级)题库
题型:问答题 简答题

Running is becoming popular these days. Many of us run for our health. Doctors say many of the health problems come from these bad habits: eating too much, drinking too much, smoking too much and not having enough exercise. Doctors tell us, "Eat less, don't smoke, and exercise more."

Running is good exercise because it helps build a strong heart. It also helps most people lose weight. One 68-year-old woman runs three times a week. She runs to lose weight. "I love to eat," she says.

Running is good for our health in other ways, too. Many runners say running makes colds and other small health problems go away. "Running is my doctor," says one man.

Running can also help people to relax. So today men and women of all ages enjoy running.

小题1:What bad habits do the health problem come from?

A.Eating too much.

B.Drinking too much.

C.Smoking cigarettes and not having enough exercise

D.All the above(以上所有)小题2:What do doctors tell us to keep healthy?

A.Eat less,don't smoke and exercise more.

B.Eat more,drink more and sleep less.

C.Eat less,drink less and sleep less.

D.Smoke a lot and exercise more.小题3:The underlined word means ______________ in Chinese.

A.疾病

B.体重

C.速度

D.健康小题4:The third paragraph shows____________.

A.running helps people to relax

B.people who like running have many healthy problems

C.running helps build a strong heart.

D.people who like running have fewer healthy problems小题5:The writer mainly tell us ________

A.how to run

B.running is a good way to keep healthy

C.how to lose weight

D.running is better than doctors

题型:问答题 简答题

磨削加工的主运动是()。

A、砂轮圆周运动 

B、工件旋转运动 

C、工作台移动 

D、砂轮架运动 

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在滚齿机上加工斜齿圆柱齿轮的全过程中,()传动链和()传动链都不能断开。

题型:问答题 简答题

按作用原理分类,属于透平式风机的是()。

A.混流式

B.滑片式

C.螺杆式

D.罗茨式

题型:问答题 简答题

出气化炉碳黑水中的碳黑浓度高会导致气化炉出水不畅。

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