可快速扩张支气管的药物是（）
A.异丙托溴铵
B.沙丁胺醇
C.沐舒坦
D.二丙酸倍氯米松
E.布地奈德
参考答案：B
putchar(c ) 函数的功能是是是_____________________________________。
Bats are surprisingly long-lived creatures, some ______ a life span of around 20 years.
A. having B. had C. have D. to have
