试题与答案

根据历史统计资料,水泥强度等级值的富余系数为1.13,混凝土强度标准差为5MPa。某

题型:单项选择题

题目:

根据历史统计资料,水泥强度等级值的富余系数为1.13,混凝土强度标准差为5MPa。某施工企业用卵石、中砂和水泥强度等级为42.5的普通硅酸盐水泥配制C30混凝土,若设计用水为220kg,则每m3混凝土的水泥用量为( )kg。

A.406.18

B.427.52

C.437.41

D.502.96

答案:

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参考答案:D解析: 本题考查的知识点是:走私罪与妨害公务罪的数罪并罚。《刑法》第157条第2款规定:“以暴力,威胁方法抗拒缉私的,以走私罪和本法第二百七十七条规定的阻碍国家机关工作人员依法执行职务罪,依...

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