在制冷机中十分重要的是节流过程 下列关于节流过程哪种是正确的？ Throttling is very important
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在制冷机中十分重要的是节流过程，下列关于节流过程哪种是正确的？ Throttling is very important in a refrigerator. Which of the following is correct about throttling？
A．氟里昂从大管子流向小管子； Freon flows from the big pipe to the small pipe;
B．氟里昂从小管子流向大管子； Freon flows from the smaller pipe to the larger pipe;
C．氟里昂从冷管子流向热管子； Freon flows from cold pipe to hot pipe;
D．氟里昂不流动； Freon does not flow;
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等焓过程