下列哪项药物不是β2受体激动剂
A．丁氯喘
B．肾上腺素
C．间羟胺
D．沙美特罗
E．福莫特罗
参考答案：C
—What would you like to drink?
— . please. [ ]
A. Some apples
B. Two breads
C. A cup of tea
D. Two sandwiches
最大流量小于10m/h的燃气表必须进行周期检定。（）
