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问题 单项选择题

混凝土强度等级为C70，HRB400级钢筋的相对受压区高度ξb（）。

A．0.550

B．0.544

C．0.518

D．0.481

答案

参考答案：D

解析：

C70混凝土，根据规范第7.1.3条

根据规范7.1.2条fcu，k=70N/mm2

由规范式(7.1.2-5)

εcu=0.0033-(fcu，k-50)×10-5=0.0031

故

补全对话，情景问答
补全对话。
从方框中选择最佳选项完成对话，有两项多余。
A. I want a job I love.
B. Why not?
C. But money isn't everything.
D. How about being a professional athlete?
E. But it's my dream to play soccer.
F. It's important to get a higher education.
G. But if I don't do this now, I'll never do it.
Father: Michael, you shouldn't join the Lions right now.
Michael:    1    
Mother: If you become a professional soccer player, you'll never go to college.
Michael: But I really want to play soccer.    2    I want to be happy.
Father: Of course you want to be happy, but there are many interesting jobs you'd like.
Michael:    3    Don't you think it's really exciting that I could join the Lions?
Father: Of course it's exciting. And I know you want to make a lot of money.    4    
Michael: I know.    5   
Mother: But don't you want to get a higher education?
1.______    2.______    3.______    4.______    5.______
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开放性试题

下面是七年级二班几位同学的对话：

张明说：分数是学生的命根，分数高，你就什么都好。

李燕说：只要老师不发现，我偷看又怎么啦？反正我的分数比你高。

林平说：老实人就是吃亏，某某偷看取得了好成绩，老师还表扬他。

请对上述观点进行评析。

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