單項選擇題A “stopper” is().

A.a short length of line used for temporarily holding another line
B.a snatch block for handling a topping lift
C.an engine order telegraph
D.the brake on a cargo winch


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1.單項選擇題()about 20 sq.m to be sand-blasted.

A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area