【单选题】在保持不变的长期荷载作用下,钢筋混凝土中心受压构件中()。
A.
徐变使混凝土压应力减小,因为钢筋与混凝土共同变形,所以钢筋的压应力也减小
B.
由于徐变是应力不增加而变形随时间增长的现象,所以混凝土及钢筋的压应力均不变
C.
根据平衡,徐变使混凝土压应力减小,钢筋压应力增大
【简答题】听力原文:A: This is the Pan-American Club. May I help you? B: Yes, I believe you have a luncheon meeting this coming Wednesday. Could you give me some more information about that? A: Yes, of course. The g...
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【多选题】按财务报告反映的经济内容分类,一般可将其分为( )。
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【单选题】听力原文:M: Hello, Lucy. This is Mac. How are you? W: Fine, thank you. A bit too busy, though, you know, I'm trying to put everything in order in my new apartment. M: Oh, I see. Well, I was wondering if y...
A.
To ask if she's got the tickets.
B.
To invite her out for an evening.
C.
To offer his help with her new flat.
D.
To take care of his friend.
【判断题】混凝土在荷载长期保持不变的作用下随时间而增长的变形称为徐变。