判断题
错误(↓↓↓ 点击‘点击查看答案’看答案解析 ↓↓↓)
A.0 B.1/2 C.1/3 D.2/3
A.3×220×1200 B.1.732×220×1200 C.2×220×1200 D.2×110×1200
A.0.05Hz B.0.1Hz C.0.2Hz D.0.5Hz
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