题型:问答题 简答题 In the past, we often a mooncake several parts to enjoy it. [ ] A. separated; from B. divided; into C. cuts: into D. divided; from 查看答案
题型:问答题 简答题 有一件工作,A单独做需要12天,A、B合作完成需要8天,先由A做3天,后由B来完成剩下的工作,那么A和B一共用了多少天来完成这项工作( )。A.21B.18C.15D.12 查看答案