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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\">将多普勒频移转换成血流速度</h4><div class=\"download_card_msg\">&ensp;&ensp;&ensp;&ensp; 
&ensp;&ensp;&ensp;&ensp;将灰阶声像图与频谱多普勒相结合可以评估多普勒超声声束与血流方向所形成的角度（θ）。声束入射角度通过测量角度校正标尺与血流方向间的夹角获得。。下面小编给大家分享将多普勒频移转换成血流速度，希望能帮助到大家。 将多普勒频移转换成血流速度文档下载网址链接：</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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