材料的强度与强度等级的关系如何?

材料的强度与强度等级的关系如何?

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以下哪个代号不是新标准(GB175—1999)对水泥强度进行分级的代号()。A.32.5B.42.5C.42.5RD.425

以下哪个代号不是新标准(GB175—1999)对水泥强度进行分级的代号()。A.32.5B.42.5C.42.5RD.425

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- Lisa, I was wondering if you could come to my birthday party this Saturday?...

- Lisa, I was wondering if you could come to my birthday party this Saturday?...

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- Would you come and have dinner with us?- _________A. No, I think I do. B. No

- Would you come and have dinner with us?- _________A. No, I think I do. B. No

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