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录像机与录音机工作原理的相同点是( )

单选题
2021-07-17 23:00
A、都采用磁头高速扫描
B、都是利用电磁信号转换
C、都可录制两面节目
D、都采用多磁头结构
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正确答案
B

试题解析

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