搜题请搜索小程序“爱下问搜题”
问题 单项选择题

普萘洛尔是（）。

A．M受体阻滞药

B．N1受体阻滞药

C．N2受体阻滞药

D．a1受体阻滞药

E．β受体阻滞药

答案

参考答案：E

解析：

传出神经系统药物的作用方式和分类

选择题
— What's that noise?
— Oh, I forgot to tell you. The new machine _____.

A. was tested
B. will be tested
C. is being tested
D. has been tested
查看答案
选择题
Tom and Lucy fell in love with each other at the first sight and they ______ for about two years.

A.have married
B.have got married
C.have been married
D.were getting married
查看答案