正位胸片上,动脉导管未闭的特征表现为() A.双房影 B.漏斗征 C.靴形心 D.梨 发布时间:2018-09-12 16:17 │ 来源:www.tikuol.com 题型:单项选择题 问题: 正位胸片上,动脉导管未闭的特征表现为()A.双房影B.漏斗征C.靴形心D.梨形心E.平腰征
题型:单项选择题 People have realized that they should go on __ balanced diet and do _____ exercise every day.A.a; /B.the; anC.the; theD./; an 查看答案
题型:单项选择题 You look so tired. You _____ have stayed up late again. [ ]A. should B. canC. may D. must 查看答案