问题
单项选择题
冷拉后的钢筋，再做拉伸试验则( )。
A．屈服强度降低，伸长率提高
B．屈服强度提高，伸长率提高
C．屈服强度降低，伸长率降低
D．屈服强度提高，伸长率降低
答案
参考答案：D
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冷拉后的钢筋，再做拉伸试验则( )。
A．屈服强度降低，伸长率提高
B．屈服强度提高，伸长率提高
C．屈服强度降低，伸长率降低
D．屈服强度提高，伸长率降低
参考答案：D
| 用方框中所给的单词的适当形式填空。 | |
Wendy: Yes. I 1 her invitation yesterday. Are you going tomorrow, Nina? Nina: Yes, of course. I wouldn't 2 her birthday party for anything. Wendy: Could you tell me what I should take as a birthday present? Nina: I was going to ask the same question. Wendy: We must hurry. he 3 , the better. Nina: I can't agree more. Well, I'll tell you what. Let's go 4 together right now and pick out what she may like. Wendy: Good 5 ! 1._____2._____3._____4._____5._____ |