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d.innerHTML = d.innerHTML + '<a class=\"download_word download_word_lb\" href=\"javascript:;\" id=\"vipdown\" onclick=\"showpay(1)\"><em></em>下载文档(未登录)九年级上册物理电功率知识点描述：物理实验可以帮助我们更好的理解相关规律并能更深入理解好公式。对于实验，最基本的要求是我们要认真观察实验现象，总结实验结论，掌握物理研究方法。下面是小编整理的九年级上册物理电功率知识点，仅供参考希望能够帮助到大家。九年级上册物理电功率知识点1</a>';
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