反流物中对食管黏膜有损害作用的主要成分是（）
A.胃酸与胃蛋白酶
B.胰液
C.胆汁
D.胰蛋白酶
E.胆盐
参考答案：A
The currency of Argentina is ( ).
A．afghani
B．lira
C．markka
D．peso
I thought that this would be a funny trick（）Jim.
A.to play on
B.to have played
C.playing on
D.to being played on
