当网络图中某一非关键工作的持续时间拖延△,且大于该工作的总时差TF时,网络计划总工期将()。
A.拖延△
B.拖延△+TF
C.拖延△-TF
D.拖延TF-△
参考答案:C
发生脱位率最高的关节是()
A.肩关节
B.肘关节
C.髋关节
D.膝关节
E.骶髂关节
— How amazing it is that astronauts are exploring outer space!
— It's a challenge, I guess, _____ man against nature. [ ]
A. of
B. for
C. by
D. about