文氏桥正弦波发生电路如下图所示,产生正弦波的频率是http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/689a456d79704917be632ef4bb25a7db.png
( ).http://img0.ph.126.net/P62l95axIqys124dtx-Pbg==/6630305804140872099.gif
下列病种中,最易发生离心性肥大的疾病是
http://img2.ph.126.net/cHybyb3yJ8qnys5Qd-7Pnw==/6630701628326517965.gif
http://img0.ph.126.net/fJT0JZPPggdU88BYehGlQA==/664280945054456724.gif