题目内容
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[主观题]
常见的砌筑砂浆的强度等级分为()等几个类别。
A.M 2.5M5M 7.5M10M15M20
B.M1M5M 7.5M10M15M20
C.M 2.5M5M7.5M10M16M20
D.M 2.5M5M10M15M20M25
答案
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A.M 2.5M5M 7.5M10M15M20
B.M1M5M 7.5M10M15M20
C.M 2.5M5M7.5M10M16M20
D.M 2.5M5M10M15M20M25