题目:
预应力混凝土的预应力筋采用应力控制方法张拉时,应以( )进行校核。
A.内缩量
B.伸长值
C.应力值
D.变形率
答案:
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At present only a few students do some reading after class. Here are several reasons. First of all, quite a lot of students are burdened with too much homework. S...