单选题If the temperature in the icebox is too high, the trouble could be（）Aa clogged scale trapBair in the systemCautomatic controls not functioning properlyDinsufficient cooling water to the condenser
单选题
If the temperature in the icebox is too high, the trouble could be（）
A
a clogged scale trap
B
air in the system
C
automatic controls not functioning properly
D
insufficient cooling water to the condenser
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