complete with recapturing their former interests and relationships while also looking into a friend who's in the area, generates the kind of solid and workable storyline at the center of the film. As well, there's also quite a lot to like with the group coming into contact with the murder...
A. 5/6 hours B. 6/5 hours C. 1/5 hours D. 1/6 hours 相关知识点: 试题来源: 解析 B。解析:设工作总量为 1,Jack 的工作效率为 1/2,Jill 的工作效率为 1/3,两人合作的工作效率为 1/2 + 1/3 = 5/6,所以合作完成所需时间为 1÷5/6 = 6/5 小时。解题关键是求出两人合作的工作效率...
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