题目内容：
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．32.5
B．42.5
C．42.5R
D．425
参考答案：
单选：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
- 题目分类：材料科学
- 题目类型：单选
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A．32.5
B．42.5
C．42.5R
D．425
A．32.5
B．42.5
C．42.5R
D．425
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