单项选择题
A.within two hours B.within three hours C.within four hours D.within five hours
It is dangerous for vessels without the operational rad...
单项选择题It is dangerous for vessels without the operational radar（）the estuary.
A.to get B.to approach C.to proceed D.to close
Bales close to the deckhead should be covered to preven...
单项选择题Bales close to the deckhead should be covered to prevent（）.
A.damage by dripping sweat B.damage by odor contamination C.from striking structure D.from steel rusty
The force resulting from the earth’s rotation that caus...
单项选择题The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
A.pressure gradient B.Coriolis effect C.aurora borealis D.ballistic deflection
