Does she have a cell phone ?            .[ ]

A. No,she isn't  

B. No,he  doesn't  

C. No,  she  doesn't

胃食管反流病最常见的症状是

A．烧心和反酸
B．吞咽困难
C．胸骨后痛
D．咽部不适
E．吞咽痛