M型受体属_____受体，可被阿托品选择性阻断。
参考答案：胆碱能
I have been looking for you everywhere. This is the _____ place in the world I would have expected to find you.
A．right
B．last
C．just
D．only
个人计算机属于( )。
A．小巨型机B．小型计算机C．微型计算机D．中型计算机
