单项选择题
A.10cmB.30cmC.50cmD.100cm
A.10.5~15.0VB.12.5~16.0VC.11.5~14.0VD.9.0~14.8V
A.蓄电池的接线B.万用表检查充电电流C.万用表测试启动电压D.试灯检测是否亮
A.10mAB.50mAC.80mAD.100mA
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