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單項選擇題

標(biāo)準(zhǔn)型高效減水劑的1天抗壓強度比不小于（）%為合格。

A.135
B.140
C.170
D.180

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單項選擇題

早強型普通減水劑的1天抗壓強度比不小于（）%為合格。

A.135
B.140
C.170
D.180

單項選擇題

早強劑的1天抗壓強度比不小于（）%為合格。

A.135
B.140
C.170
D.180

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