材料在弯曲过程中、应力的分布情况是()。A.整个断面都有应力,且每处的应力是一样的

题型:单项选择题

问题:

材料在弯曲过程中、应力的分布情况是()。

A.整个断面都有应力,且每处的应力是一样的

B.整个断面都有应力,外层受拉伸,内层受挤压,没有一个不受压又不受拉的中层存在

C.整个断面都有应力,外层受拉伸,内层受挤压,中间有一个既不受压又不受拉的中性层,就是厚度的中心

D.整个断面都有应力,外层受拉伸,内层受挤压,中间有一个既不受压又不受拉的中性层,但不一定在厚度的中心

考点:冷作钣金工铆工铆工题库
题型:单项选择题
任务型阅读,根据短文内容完成所给任务。
根据短文内容,完成表格中小沈阳和刘谦的信息,每空限填一词。
As we know, Xiao Shenyang and Liu Qian did wonderful jobs in the CCTV Spring Festival GALA(春节联欢晚会). Now many people are crazy about these two persons. But how much do you know about them?
Xiao Shenyang was born in a poor peasant family which is in difficult family conditions. His real name is Shen He. He is an actor. He is good at Er Ren Zhuan. He learned acts, following Zhao Benshan. During the school life, he was very active in many activities. He looks like a simple man, but he never stops pursuing (追求) his artistic aspiration(渴望). More and more people like his style of performance, and we hope he can make great progress in the future.
Liu Qian is a young magician from Taiwan. At the age of 7, Liu saw a cute magic toy in a shop. At that moment he began to love magic and decided to learn it. Liu didn’t go to any magic school. He practiced tricks every day to improve his skills himself, until one day he was able to put on a show for his class. He saw the surprise on everyone’s face, and he felt it was cool. He often does street shows for passers-by, police and farmers. He worked hard at it. Now he is a famous magician.
Name
Xiao Shenyang
Liu Qian
Job
An actor
A young 1______ from Taiwan.
How
to
succeed
He learned acts, following Zhao Benshan. During the school life, he was very2______.
He looks like a 3_____ man. But he never stops pursuing the artistic aspiration.
He learned the magic only by 4____. Liu didn’t go to any magic school.
At his show for his class, he found everyone5______ and he felt it was cool.
题型:单项选择题

某五金工具厂为小规模纳税人,适用的增值税征收率为6%。2004年3月份,该厂取得销售收入(含增值税) 5 512元,则该厂3月份应缴纳的增值额为( ) 元。

A.312

B.330.72

C.884

D.937.04

题型:单项选择题

递等式计算,能简算的就简算.

(1)1.25×8.08

(2)49.5÷7.5+49.5÷2.5

(3)15.7×1.3+14.3×1.3

(4)(1.8-1.8×0.9)÷(0.38-0.28)

题型:单项选择题

常用带电作业工具使用荷重如何决定?

题型:单项选择题

当列车()在运行中施行制动时,从实施制动开始到全列车闸瓦压上车轮这段时间称为制动空走时间。

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