试题与答案

张师傅单独完成一项工作需5小时,如果张师傅和王师傅同时工作,则只用3小时即可完成,如

题型:单项选择题

题目:

张师傅单独完成一项工作需5小时,如果张师傅和王师傅同时工作,则只用3小时即可完成,如果王师傅单独工作,问需多少小时才能完成该项工作( )

A.3.5

B.7.5

C.8

D.8.5

答案:

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参考答案:A,B,D

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