环氧乙烷解吸、吸收系统在停车倒空时,当系统中乙二醇含量()时塔釜液可以就地排入地沟。
A、≤0.05%
B、≤0.1%
C、≤0.2%
D、≤0.5%
参考答案:C
—I ________ my son to Laos for sightseeing.
—I would rather you didn't do that,for the bird flu ________ several lives there.[ ]
A. took;claimed
B. am taking;has claimed
C. took;had claimed
D. will take;claimed
工作A的工作持续时间为3天,该工作有三项紧后工作,工作持续时间分别为4天、6天、3天;最迟完成时间分别为第16天、第12天、第11天,则工作A的最迟开始时间为第( )天。
A.6B.3C.8D.12