單項(xiàng)選擇題

Geographic range is the maximum distance at which a light may be seen under（）.

A.existing visibility conditions，limited only by the curvature of the Earth
B.perfect visibility conditions，limited only by the curvature of the Earth
C.existing visibility conditions，limited only by the intensity of the light
D.perfect visibility conditions，limited only by interference from background lighting

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單項(xiàng)選擇題

Due to the shape of the sea anchor，the best way to haul it back aboard is by（）.

A.hauling in on the anchor line as you would any anchor
B.getting all hands to assist
C.its trip line
D.cutting the line，as you cannot haul it back in

單項(xiàng)選擇題

Deficient oxygen content inside a chain locker can be detected with（）.

A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator

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Geographic range is the maximum distance at which a light may be seen under（）.

你可能感興趣的試題

Due to the shape of the sea anchor，the best way to haul it back aboard is by（）.

Deficient oxygen content inside a chain locker can be detected with（）.

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Due to the shape of the sea anchor，the best way to haul it back aboard is by（）.