单项选择题
In order to reduce the accumulation of static electricity while loading petroleum products, you should（）.
A.start to load at maximum pressure
B.start to load slowly
C.increase the air flow into the tank
D.use the overall method of loading only
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In ship construction, frame spacing is（）.
A.greater at the bow and stern
B.reduced at the bow and stern
C.uniform over the length of the vessel
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单项选择题
In the absence of external forces, adding weight on one side of a floating vessel causes the vessel to（）.
A.heel until the angle of loll is reached
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In the absence of external forces, the center of buoyancy of an inclined vessel is vertically aligned directly below the（）.
A.center of gravity
B.amidships station
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