單項(xiàng)選擇題

A spark arrestor（）.

A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an enging's exhaust system
D.grounds static electicity

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單項(xiàng)選擇題

A stay is（）.

A.standing rigging
B.a downhaul
C.a halyard
D.a jib

單項(xiàng)選擇題

A survival craft being used to pick up a person who has fallen overboard from a vessel ahould approach the person（）.

A.at a high rate of speed
B.under oars
C.against the wind
D.with the wind

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A spark arrestor（）.

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A stay is（）.

A survival craft being used to pick up a person who has fallen overboard from a vessel ahould approach the person（）.