肺动脉口起自()A.左心房 B.左心室 C.右心房 D.右心室 E.室间隔 发布时间:2017-06-07 16:49 │ 来源:www.tikuol.com 题型:单项选择题 B1型题 问题: 肺动脉口起自()A.左心房B.左心室C.右心房D.右心室E.室间隔
题型:单项选择题 B1型题 . Since last year, the global economic slowdown ________ in many countries. It is expected that the world economy will not recover until the end of 2010.A.is spreadingB.spreadC.had spreadD.has been spreading 查看答案