食管癌好发于食管的() A.上段 B.中上段 C.中段 D.胃食管前庭段 E.中下段 发布时间:2017-08-25 15:14 │ 来源:www.tikuol.com 题型:单项选择题 问题: 食管癌好发于食管的()A.上段B.中上段C.中段D.胃食管前庭段E.中下段
题型:单项选择题 When we worked in the same office,we _______ often have coffee together.A.couldB.shouldC.wouldD.ought to 查看答案