根据债券的( ),可将债券市场分为发行市场和流通市场。
A.发行主体
B.发行地点
C.运行过程和市场的基本功能
D.发行主体和发行地点的不同
参考答案:C
关于“真菌性食管炎”,下列描述哪项不正确()
A.多为白色念珠菌感染
B.主要侵犯食管中上段
C.常有胸骨后疼痛和进食梗阻
D.轻者粘膜增粗,呈串珠状,重者偶有“鹅卵石征”
E.主要侵犯食管中下段
He didn't realize he had forgot his bag _____ the plane had taken off.
A.unless
B.until
C.if
D.or