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【单选题】
某汽车R134a空调系统制冷不足,经检测高、低压侧的压力分别为1.95~2.45MPa和0.30~0.40MPa,以下说法正确的是( )。A.
制冷剂正常
B.
制冷剂不足
C.
制冷剂过量
D.
制冷剂有水分
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