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單項(xiàng)選擇題

All vessels（）size shall, whether in a fairway or not,observe the International Regulation for Preventing Collisions at Sea 1972.

A.in spite of
B.irrespective
C.in respect
D.in matter of

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單項(xiàng)選擇題

An ABC dry chemical fire extinguisher would be least effective against a fire in（）.

A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can

單項(xiàng)選擇題

An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.

A.greater range
B.effective on all types of fires
C.cleanliness
D.All of the above

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