分布于心脏的受体主要是：
A．α1受体B．β1受体C．M受体D．α2受体E．β2受体
参考答案：B
现有95%乙醇500ml，要配制l70%乙醇，需加入灭菌蒸馏水约
A．132ml
B．179ml
C．185ml
D．279m1
E．285ml
Even though you are a project manager in a pharmaceutical company，you have worked as a scientist in the industry for several years．Your subordinates look up to you for guidance and advice．The power that you have over your subordinates is （）.
A．referent
B．expert
C．legitimate
D．reward
