单项选择题
The Chief Tally would like to inquire（）the rotation of the discharging ports.
A.at
B.on
C.about
D.after
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单项选择题
The cargo，when（），should be completely covered with plastic.
A.stow
B.stowing
C.stowed
D.be stowed -
单项选择题
The cargo is liable to burn.Please keep it（）the engine room.
A.out of
B.away from
C.from away
D.out from -
单项选择题
The cargo fall over the dock is called the（）.
A.burton fall
B.down fall
C.hatch fall
D.stay fall
