Oil water separators are used to ensure that ships don’t discharge oil when （） bilge water.<br>A:to pump off<br>B:being pumped<br>C:pumping out<br>D:it pumping out

Oil water separators are used to ensure that ships don’t discharge oil when （） bilge water.
A:to pump off
B:being pumped
C:pumping out
D:it pumping out

出自：海船船员证

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