A compressor should never be stopped （）.<br>A:without first cooling it<br>B:without first heating it<br>C:without first unloading it<br>D:without first loading it

A compressor should never be stopped （）.
A:without first cooling it
B:without first heating it
C:without first unloading it
D:without first loading it

出自：海船船员证

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