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d.innerHTML = d.innerHTML + '<a class=\"download_word download_word_lb\" href=\"javascript:;\" id=\"vipdown\" onclick=\"showpay(2)\"><div class=\"download_card\"><div class=\"card_nr card_nr_lb\"><h4 class=\"card_bt\">化学氧气性质知识点</h4><div class=\"download_card_msg\">学好化学一定要勤做练习题，即保证做一定的课内练习和课外练习题。它是应用所学知识的一种书面形式，只有通过应用才能更好地巩固知识、掌握知识。下面是小编整理的化学氧气性质知识点，仅供参考希望能够帮助到大家。化学氧气性质知识点1.氧气的物理性质：无。下面小编给大家分享化学氧气性质知识点，希望能帮助到大家。 化学氧气性质知识点文档下载网址链接：</div></div><div class=\"download_card_btn download_card_btn_lb\"><div class=\"content_box_tj\"><span>推荐度：</span><img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\"></div><div class=\"downlod_btn_right demo_tc downlod_btn_right_lb\"><em class=\"downlod_icon\"></em>点击下载文档<span>文档为doc格式</span></div> </div></div></a>';
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