最好是关于物态变化、声、光、透镜、简单的电学的.最好要比较简单的 我们没写过论文= = 短点短点儿!
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![最好是关于物态变化、声、光、透镜、简单的电学的.最好要比较简单的 我们没写过论文= = 短点短点儿!](/uploads/image/z/8030294-62-4.jpg?t=%E6%9C%80%E5%A5%BD%E6%98%AF%E5%85%B3%E4%BA%8E%E7%89%A9%E6%80%81%E5%8F%98%E5%8C%96%E3%80%81%E5%A3%B0%E3%80%81%E5%85%89%E3%80%81%E9%80%8F%E9%95%9C%E3%80%81%E7%AE%80%E5%8D%95%E7%9A%84%E7%94%B5%E5%AD%A6%E7%9A%84.%E6%9C%80%E5%A5%BD%E8%A6%81%E6%AF%94%E8%BE%83%E7%AE%80%E5%8D%95%E7%9A%84+%E6%88%91%E4%BB%AC%E6%B2%A1%E5%86%99%E8%BF%87%E8%AE%BA%E6%96%87%3D+%3D+%E7%9F%AD%E7%82%B9%E7%9F%AD%E7%82%B9%E5%84%BF%21)
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