单项选择题
A.0.5ml/h B.5ml/h C.1ml/h D.0.1ml/h
A.系统异常 B.阻塞 C.电池电压低 D.系统故障
A.1600mah B.2400mah C.4800mah D.2600mah
A.变快 B.变慢
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