单项选择题
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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单项选择题
（）about 20 sq.m to be sand-blasted.
A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area
