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【单选题】
管桁架结构中的杆件大部分情况下只受轴线拉力或压力,应力在截面上均匀分布,因而容易发挥材料的作用,这些特点使得桁架结构用料经济,结构自重小。A.
扭矩
B.
弯矩
C.
轴线拉力或压力
D.
剪力
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举一反三
【简答题】A．He hit it with a hall. B．He accidentally dropped it. C．He tried to piece it together with super glue. D．He bumped into it with his arm.
【简答题】在制造系统中，机械加工所使用的（ ）、（ ） 、（ ）和（ ）组成了一个相对独立的统一体，称之为工艺系统。
【单选题】_____in physical shape, he dropped out of the University of Syracuse.
A.
As he was bad
B.
Bad as he was
C.
Bad although he was
D.
Bad though he was
【简答题】（）在制造系统中,机械加工所使用的（）、（）、（）和（）组成了一个相对独立的统一体,称之为工艺系统。
【单选题】Rewrite the following sentence using the cue and inversion: If he had understood the situation, he would have quit. (had)
A.
Should he had understood the situation, he would have quit.
B.
Had he undersood the situation, he would have quit.
C.
Did he have understood the situation, he would have quit.
【简答题】A．He hit it with a ball. B．He accidentally dropped it. C．He tried to piece it together with super glue. D．He bumped into it with his arm.
【简答题】机械制造系统中,机械加工所使用的 、 、 和 组成了一个相对独立的系统,称为工艺系统。
【单选题】He would have finished his college education, but he ______ to quit and find a job to support his family.
A.
had had
B.
has
C.
had
D.
would have
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