在探究声音的产生和传播的条件时同学们做了以下实验请根据要求回答问题.1小华同学将一只通电的小电铃放在连通于抽气机的玻璃罩内如图1示 Template




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tomski在探究声音的产生和传播的条件时同学们做了以下实验请根据要求回答问题.1小华同学将一只通电的小电铃放在连通于抽气机的玻璃罩内如图1示 coloring