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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)四年级下册语文课文知识点描述：语文是偏重从文献角度研究语言和文字的学科总称，一般包括文字学、训诂学、音韵学、校勘学等。中国由于古代文献丰富，文字比较特殊，语文比较发达。下面是小编整理的四年级下册语文课文知识点，仅供参考希望能够帮助到大家。四年级下册语文课文知识点(一)、</a>';
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