单项选择题
A.AC50mA B.AC45mA C.AC40mA D.DC40mA
A.AC105mA B.AC100mA C.AC100A D.DC105mA
A.1.1mm B.1.3mm C.1.5mm D.1.8mm
A.AC8.5V B.AC9.2V C.AC9V D.DC9.2V
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