下列表达错误的是( )。A．(A) 规范验算的裂缝宽度是指钢筋水平

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问题单项选择题

下列表达错误的是( )。

A．(A) 规范验算的裂缝宽度是指钢筋水平处构件侧表面的裂缝宽度

B．(B) 受拉钢筋应变不均匀系数愈大，表明混凝土参加工作程度愈小

C．(C) 钢筋混凝土等截面受弯构件，其截面剐度不随荷载变化，但沿构件长度变化

D．(D) 钢筋混凝土梁采用高等级混凝土时，承载力提高有限，对裂缝宽度和刚度的影响也很有限

答案

参考答案：C

补全对话，情景问答

补全对话，每空一词.

A: ____ did you do ____ Sunday morning?

B: I went ____．

A: What did you ____?

B: I bought a new jacket.

A: What ____ is it?

B: It is white.

A: Hi,Zhao Jun. How was your Sunday?

B: It _____ great.

A: Really? What did you do?

B: I _____ _____.

A: _____ did you play it with?

B: I played it with my friends.

A: Did you have a good time?

B: Yes, we _____.

A: Hey, Lucy.

B: Hi, Jim.

A: _____ _____ your weekend?

B: It was great.

A: So, what _____ you _____ _____ weekend?

B: Well, _____ Saturday morning I _____ soccer, on Saturday afternoon I _____ to the beach,

and on _____ _____ I _____ _____ the movies.

A: Cool.

B: Then, _____ _____ moming, I _____ my room. On Sunday _____, I _____ soccer, and _____

_____ night, I _____ some homework.

填空题

种群数量在较长的时期内维持在几乎同一水平，这种现象称为______。