指出下面钢种HRB335中各符号的意义,H代表(),的代表(),B代表(),335代

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问题:

指出下面钢种HRB335中各符号的意义,H代表(),的代表(),B代表(),335代表屈服强度是335Mpa。

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若函数y=-2mx-(m2-4)的图象经过原点,且y随x的增大而增大,则[ ]

A、m=2

B、m=-2

C、m=±2

D、以上答案都不对

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My mother is a kind and nice woman. 小题1:____ One Sunday night, when I was watching the film Harry Potter very happily, she asked me to go to bed. 小题2:______ that I didn’t move. But for a while, I noticed that she didn’t say anything. 小题3:_____ I was so sad and that I went into my room and cried. I thought “I have only two nights in a week to enjoy the TV. 小题4:_____”The next day she cooked and talked with me as usual. I pretended not to hear, but she didn’t mind and told me why she didn’t allow me to watch TV. 小题5:_____ Then I understood her. I love my mother.
A. But she is very strict with me.
B. because she wanted me to have a good rest .
C. Then she got angry and turned off the TV.
D. I loved the film so much.
E. Why doesn’t mother allow me to watch TV?
题型:填空题

成组设计多个样本比较秩和检验的近似检验为

A.F检验

B.t检验

C.χ2检验

D.拟合优度检验

E.u检验

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下列哪项不能用来检测类别变量?()

A.T检验

B.百分比

C.比例

D.Chi-square tests

题型:填空题

网球英文记分方法love、()、thirty、()、game。

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