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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)必修五第一章数学知识点描述：数学思想方法是数学知识的精髓，是分析、解决数学问题的基本原则，也是数学素养的重要内涵，它是培养学生良好思维品质的催化剂。下面是小编整理的必修五第一章数学知识点，仅供参考希望能够帮助到大家。必修五第一章数学知识点(一) 解斜三角形1、解斜三角</a>';
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