X线的本质是A．电磁波B．光子C．超声波D．电磁效应E．以上都不是

作者: rantiku 人气: - 评论: 0

问题 X线的本质是

选项 A．电磁波 B．光子 C．超声波 D．电磁效应 E．以上都不是

答案 A

解析

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