为了探究声音产生的条件有人建议利用以下几个实验现象甲在钟罩内的闹钟正在响铃把钟罩内的空气抽出一些后铃声会明显减小乙在吊着的大钟上 Template




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tomski为了探究声音产生的条件有人建议利用以下几个实验现象甲在钟罩内的闹钟正在响铃把钟罩内的空气抽出一些后铃声会明显减小乙在吊着的大钟上 coloring