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【多选题】
影响水泥凝结时间的因素有()。
A.
水泥细度
B.
水灰比
C.
C 3 A 含量
D.
混合材掺量的多少
E.
环境中的 MgSO 4
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A.
one can choose his color preference
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one is born with his color preference
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readily
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readily
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necessarily
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instantly
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