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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\">圆的方程教案</h4><div class=\"download_card_msg\">圆的方程教案                   教学目的：掌握圆的标准方程，并能解决与之有关的问题 教学重点：圆的标准方程及有关运用 教学难点：标准方程的灵活运用 教学过程： 一、导入新课，探究标准方程 二、掌握知识，巩固练习 练习：⒈说出下列圆的方程 ⑴圆心（3，-2）半径为5 ⑵圆心（0，3）半径为3 ⒉指出下列圆的圆心和半径 ⑴（x-2）2+(y+3)2=3 ⑵x2+y2=2 ⑶x2+y2-6x+4y+12=0 ⒊判断3x-4y-10=0和x2+y2=4的位置关系 ⒋圆心为（1，3），并与3x-4。下面小编给大家分享圆的方程教案，希望能帮助到大家。 圆的方程教案文档下载网址链接：</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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