题目内容
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提问人:网友cl18507496603
发布时间:2022-01-07
[主观题]
The water level showing in a boiler water gauge glass is usually () duringworking.A.h
The water level showing in a boiler water gauge glass is usually () duringworking.
A.higher than the actual drum water level
B.equal to the actual drum water level
C.increasing due to steam condensation in the glass
D.lower than actual drum wafer level
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