【简答题】(A man and a woman are talking at the Shanghai Hongqiao Airport.) M:The airplanes are late, aren’t they? W: 1 I never expect planes to be on time. M:Are you working here or just a visitor? W:A visitor...
【单选题】In the project network plan, the ES and LS of work M are 15d and 18d respectively, D=7d, and the work M has two back closely work, their ES are 24d and 26d respectively, then the TF and FF of work M a...