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【多选题】
空气压缩机过滤装置主要是去除()A.
空气中的水分
B.
空气中的油滴
C.
杂质、风尘等
D.
氢气、一氧化碳等易燃易爆气体
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皮皮学刷刷变学霸
举一反三
【单选题】As NC machines need a large capital investment, we should efficient ly use the m .
A.
T
B.
F
【简答题】个人卫生应做到哪“四勤”?
【单选题】The author thinks that ______.
A.
we should have enough water if every large city purified and reused its water
B.
even if we could purify and reuse the water, water shortage might still be a problem
C.
most large cities in the world have succeeded in purifying and reusing their water
D.
purifying water is the only way to deal with the problem of water shortage
【判断题】The body requires large amount of minerals so we should eat food containing a lot of them .
A.
正确
B.
错误
【简答题】厨房人员的个人卫生应做到哪四勤?
【判断题】As NC machines need a large capital investment, we should efficiently use them.
A.
正确
B.
错误
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