--- Would you mind my having another glass of beer?

---__________.

A．No, just go ahead

B．No, I’m not sure about it

C．Yes, here you are

D．Yes, help yourself

病原体由一个传染源传播到另一个易感者所经历的途径（）

A.流行过程

B.传播过程

C.传播机制

D.传播途径

E.传播因素