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当前学科：水利工程造价
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已知洒水车4.8m3 折旧费为10.31元,修理费12.71元,人工费8.61元,动力燃料费24.60元,求洒水车4.8m3机械台时费?()
A. 58.23
B. 55.23
C. 56.23
D. 57.23
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