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> 广播电台通过________________将信息传播给千家万户．某收音机的面板上有“AM”，和“FM”两个波段（如图所示），其中波长较长的是________________波段．

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发布时间：2024-09-08

广播电台通过将信息传播给千家万户．某收音机的面板上有“AM”，和“FM”两个波段（如图所示），其中波长较长的是波段．

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提问用户：l1***By3

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