單項(xiàng)選擇題

Removing which will extinguish a fire?（）.

A.nitrogen
B.Carbon dioxide
C.Sodlium
D.Oxygen

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單項(xiàng)選擇題

A band or collar on the top end of a boom which the topping lift, midships guy, and outboard guys are secured, is called the（）.

A.collar band
B.guy band
C.pad eye collar
D.spider band

單項(xiàng)選擇題

A bench hook is used for（）.

A.handing of cargo cases
B.handing oilskings
C.sewing canvas
D.splicing small stuff