單項(xiàng)選擇題You detect oil around your tank vessel while discharging. The first thing to do is（）.
A.try to find out where the oil is coming from
B.call the master
C.have the pumpman check the discharge piping
D.shut down operations
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A. Wet clothes during the day to decrease perspiration
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A.No, I have
B.Yes, I haven't
C.Yes, I have
D.No, I didn't
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