已知双代号网络中,某项工作的ES=4天,EF=6天,LS=7天,LF=9天,该工作的 TF=( )天。
A.3B.5C.6D.8
参考答案:C
— I'm too busy to go to the cinema with you, Mike.
— __ ____.The film is said to be a very good one.[ ]
A. That's all right
B. I'm so sorry
C. What a shame
D. It doesn't matter
地铁原则上每年()至()为空调季节,其它时间为非空调季节。