食管腐蚀伤后最常见的狭窄部位是:()
A.食管入口
B.左支气管压迹处
C.主动脉弓压迹处
D.食管下段横膈以上
E.贲门
参考答案:D
注射剂常用的抑菌剂有()
A.苯甲醇
B.山梨酸
C.苯酚
D.三氯叔丁醇
E.苯甲酸
The city of Nanchong has grown so fast that it’s at least what it used to be.
A.five times the size of
B.five times the size as large as
C.five times larger
D.five times size as