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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)鲁教版物理必修二课本知识点描述：物理公式的书写、物理计算题的解题格式，都要做到规范和熟练，物理用语也是，必须学好，它们是学好物理的基础。下面是小编整理的鲁教版物理必修二课本知识点，仅供参考希望能够帮助到大家。鲁教版物理必修二课本知识点一、知识点(一)曲线运动的条件：合外力</a>';
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