噪声是一种严重的环境污染.李明想制作一个防噪音的耳罩,他通过比较几种材料噪声是一种严重的环境污染.小明想制作一个防噪声的耳罩,他通过比较几种材料(衣服、锡箔纸、泡沫塑料)的隔
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![噪声是一种严重的环境污染.李明想制作一个防噪音的耳罩,他通过比较几种材料噪声是一种严重的环境污染.小明想制作一个防噪声的耳罩,他通过比较几种材料(衣服、锡箔纸、泡沫塑料)的隔](/uploads/image/z/3662202-66-2.jpg?t=%E5%99%AA%E5%A3%B0%E6%98%AF%E4%B8%80%E7%A7%8D%E4%B8%A5%E9%87%8D%E7%9A%84%E7%8E%AF%E5%A2%83%E6%B1%A1%E6%9F%93.%E6%9D%8E%E6%98%8E%E6%83%B3%E5%88%B6%E4%BD%9C%E4%B8%80%E4%B8%AA%E9%98%B2%E5%99%AA%E9%9F%B3%E7%9A%84%E8%80%B3%E7%BD%A9%2C%E4%BB%96%E9%80%9A%E8%BF%87%E6%AF%94%E8%BE%83%E5%87%A0%E7%A7%8D%E6%9D%90%E6%96%99%E5%99%AA%E5%A3%B0%E6%98%AF%E4%B8%80%E7%A7%8D%E4%B8%A5%E9%87%8D%E7%9A%84%E7%8E%AF%E5%A2%83%E6%B1%A1%E6%9F%93.%E5%B0%8F%E6%98%8E%E6%83%B3%E5%88%B6%E4%BD%9C%E4%B8%80%E4%B8%AA%E9%98%B2%E5%99%AA%E5%A3%B0%E7%9A%84%E8%80%B3%E7%BD%A9%2C%E4%BB%96%E9%80%9A%E8%BF%87%E6%AF%94%E8%BE%83%E5%87%A0%E7%A7%8D%E6%9D%90%E6%96%99%28%E8%A1%A3%E6%9C%8D%E3%80%81%E9%94%A1%E7%AE%94%E7%BA%B8%E3%80%81%E6%B3%A1%E6%B2%AB%E5%A1%91%E6%96%99%29%E7%9A%84%E9%9A%94)
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