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八年级物理全册3.1科学探究声音的产生与传播习题课件新版沪科版20190117365.pptx

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第三章 声的世界,第一节 科学探究:声音的产生与传播,一,二,一,二,一,二,一,二,三,答案,解析,一,二,三,答案,解析,一,二,三,答案,解析,答案,解析,一,二,三,答案,解析,一,二,三,答案,解析,一,二,三,一,二,三,答案,解析,

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