单选题During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.Athe highestBabove 3/4C1/2 -3/4Dthe lowest
单选题
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
A
the highest
B
above 3/4
C
1/2 -3/4
D
the lowest
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