题目内容
在工程网络计划中,工作M的最早开始时间为第17天,其持续时间为5天,该工有三项紧后工作,它们的最早开始时间分别为第25天、第27天和第30天,则工作M的自由时差为()天。
查看答案
搜索结果不匹配？点我反馈
更多问题
John ________ hard and there seemed to be someone whispering inside the house.
The police ________ into the hotel room and found the young lady dead on the floor.
The kind old woman ________ more than twenty homeless children by herself.
His father can ________ a plane but not a kite.
微信支付 
支付宝支付