A precaution you should take before bunkering is to （） .<br>A:plug the vents<br>B:plug the sounding pipes<br>C:plug the scuppers<br>D:close the lids on the vents

A precaution you should take before bunkering is to （） .
A:plug the vents
B:plug the sounding pipes
C:plug the scuppers
D:close the lids on the vents

出自：海船船员证

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