三仁汤中“三仁”指
A.杏仁
B.冬瓜仁
C.桃仁
D.白蔻仁
E.薏苡仁
参考答案:A, D, E
________ people go abroad, they have to bring their passports with them.
A.Until
B.When
C.Because
D.Before
简述胃食管反流病的并发症。