食管癌的典型症状是() A.持续性胸背痛 B.进行性吞咽困难 C.声音嘶哑 发布时间:2017-05-18 07:56 │ 来源:www.tikuol.com 题型:单项选择题 B型题 问题: 食管癌的典型症状是()A.持续性胸背痛 B.进行性吞咽困难 C.声音嘶哑 D.刺激性干咳 E.有杵状指(趾)
题型:单项选择题 B型题 — Do you know this city? — No, this is the first time that I ______ here.[ ]A. was B. amC. have been D. had been 查看答案