问题
单项选择题
Where is the only place a person can obtain beta blockers
A．Supermarket.
B．Convenience store.
C．Stationary store.
D．Doctor's office.
答案
参考答案：D
解析：[分析] 细节题型。 见文中：Beta blockers are prescription drugs which have been around for 25 years．β-受体阻滞药是一种已存在25年左右的处方类药。既是处方药，当然要从医生处获得了。