As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into （）.<br>A:liquid<br>B:oily mixture<br>C:emulsion<br>D:vapor

As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into （）.
A:liquid
B:oily mixture
C:emulsion
D:vapor

出自：海船船员证

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