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單項(xiàng)選擇題

It is dangerous for vessels without the operational radar（）the estuary.

A.to get
B.to approach
C.to proceed
D.to close

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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