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【单选题】
以下计算机硬件故障诊断的方法正确的是( )A.
观察是维修判断过程中最基本的方法，它只用于整个维修的最初阶段
B.
鲁大师等软件的测试报告可以准确定位计算机故障
C.
因插拔法需要反复开关机，建议不使用
D.
在怀疑某设备有接触不良的故障时，可以通过振动、适当的扭曲来判断
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A.
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B.
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C.
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D.
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