有吞咽困难时，食管癌应同下列疾病鉴别，除外（）
A.食管良性肿瘤
B.贲门失迟缓症
C.食管炎
D.纵隔肿瘤
E.晚期肺癌侵犯食管
参考答案：A
人工膝关节置换术后常见并发症是（）。
A.关节感染
B.深静脉血栓和肺栓塞
C.腓总神经损伤
D.假体周围骨折和髌韧带撕脱
E.以上都正确
If you had told me in advance, I ___ him at the airport. [ ]
A. would meet
B. met
C. would have met
D. were to meet
