题目内容
降压作业时，管道内燃气压力控制在()Pa范围内
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疲劳测定的标准：身体情况的变化，完成某种专门任务时的()降低，感到()
下列属于临时备用医嘱的是
______ that this policy will be a golden opportunity for all business sectors.
AThere is no doubt
Bthere is no fact
CUndoubting
DIt has no doubt
He’s a very naughty boy and is always in ________ for his mischief.
Adifficulty
Bmisery
Cpunishment
Dtrouble
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