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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)电脑基础知识教程第13讲：调节音量描述：十三、调节音量在听音乐或者看视频时，需要调整音量，有时候也需要把声音关闭，设置成静音，1、调节音量1）在桌面下边的任务栏右边有一个“系统托盘”，里面有一个小喇叭图标，这个就是音量控制图标；2）瞄准小喇叭，单击鼠标左键，注意瞄准了再点，就可以</a>';
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