题目内容

梁在集中力偶作用截面处____

A. Fs图有突变,M图无变化
B. M图有突变,Fs图有折角
C. M图有突变,Fs无变化
D. M图有突变,Fs图有折角

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用叠加法____

A. 只能作M图,不能做Fs图
B. 只能作Fs图,不能做M图
C. 只能作弯曲内力图,不能做其它内力图
D. 可以作各种内力图

The greenhouse gases ————————energy in the atmosphere and make the Earth warmer.

Shut down the computer when we are through with it; put it ———— when we leave it for a while.

A lot of small problems can be solved by ____________ your computer.

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