Whenreplacingapowersupply,whatMUSTthetechnicianobserve?()A.voltageB.currentC.wattageD.resistance
题目
Whenreplacingapowersupply,whatMUSTthetechnicianobserve?()
A.voltage
B.current
C.wattage
D.resistance
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参考答案和解析
参考答案：C