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【判断题】
蒸发真空跌会使闪蒸罐真空跌。
A.
正确
B.
错误
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【单选题】Obtaining Drinking Water from Air Humidity Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a (51) of obtaining drinking water from a...
A.
who
B.
where
C.
when
D.
which
【单选题】真空的磁导率为()。A 2π×10-7H／mB 4π×10-7H／mC 5π×10-7H／m
A.
2π×10-7H/m
B.
4π×10-7H/m
C.
5π×10-7H/m
相关题目：
【单选题】Obtaining Drinking Water from Air Humidity Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a (51) of obtaining drinking water from a...
A.
who
B.
where
C.
when
D.
which
【单选题】真空的磁导率为()。A 2π×10-7H／mB 4π×10-7H／mC 5π×10-7H／m
A.
2π×10-7H/m
B.
4π×10-7H/m
C.
5π×10-7H/m
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