Austin-Flint杂音见于( )A.二尖瓣关闭不全B.二尖瓣狭窄C.主动脉瓣 发布时间:2017-12-06 04:20 │ 来源:www.tikuol.com 题型:单项选择题 问题: Austin-Flint杂音见于( )A.二尖瓣关闭不全B.二尖瓣狭窄C.主动脉瓣关闭不全D.主动脉瓣狭窄E.肺动脉瓣关闭不全
题型:单项选择题 Although the causes of cancer ____we do not yet have any practical way to prevent it.A.are being uncoveredB.have been uncoveringC.are uncoveringD.have uncovered 查看答案