单选题To prevent the overflow of cargo tanks due to expansion, you should top off （）.Ato the bottom of the expansion trunkBto within 1% to 3% of its capacityCto within 1% to 3% inches of its capacityD1 to 3 inches from top of the vent pipe
单选题
To prevent the overflow of cargo tanks due to expansion, you should top off （）.
A
to the bottom of the expansion trunk
B
to within 1% to 3% of its capacity
C
to within 1% to 3% inches of its capacity
D
1 to 3 inches from top of the vent pipe
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