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【单选题】
《江苏省市政工程计价表》定额中各类砌体所使用的砂浆均为普通现拌砂浆,若实际使用预拌(干混或湿拌)砂浆时,使用干混砂浆砌筑的,除将现拌砂浆数量同比例调整为干混砂浆外,另按相应定额中每立方米砌筑砂浆扣除( )工日,灰浆搅拌机台班数量乘以系数 0.6 。A.
0.2
B.
0.4
C.
0.45
D.
0.55
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A.
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B.
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