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【单选题】
混凝土强度等级是根据混凝土()划分的。
A.
轴心抗压强度;
B.
立方体抗压强度标准值;
C.
抗拉强度;
D.
抗弯强度。
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A.
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B.
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C.
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D.
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A.
can't be see
B.
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C.
can't be saw
D.
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A.
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