If a refrigeration compressor is running continuously without lowering temperature as normal in the refrigerator, the trouble may be （）.<br>A:excessive condenser cooling water<br>B:warm food in the refrigerator<br>C:a shortage of refrigerant<br>D:s shortage of compressor oil

If a refrigeration compressor is running continuously without lowering temperature as normal in the refrigerator, the trouble may be （）.
A:excessive condenser cooling water
B:warm food in the refrigerator
C:a shortage of refrigerant
D:s shortage of compressor oil

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