---We’ll have a math exam this afternoon.  

---_________.

A．Take it easy

B．Have a good time

C．Wish you good luck

D．Congratulations to you

稳定肥大细胞膜的是

A．氨茶碱
B．沙丁胺醇
C．异丙托溴铵
D．布地奈德
E．色甘酸钠