【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...
【多选题】A driving wheel and three driven wheels are installed in the transmission shaft with a diameter of D shown. The torques m 1 =15 KN × m , m 2 =2 KN × m , m 3 =8 KN × m, m 4 =5 KN × m are exerted on the...