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正弦交流电的波形图描绘的是电流的大小和方向随()变化的曲线。
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正弦交流电的波形图描绘的是电流的大小和方向随()变化的曲线。
A、电压
B、电动势
C、频率
D、时间
时间:2021-12-30 23:13
关键词:
初级压缩机工
压缩机工考试
合成氨装置操作高级工
合成氨装置操作工
答案解析
D
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