Once ____________ ,  a plan should be carried out.

A．make

B．making

C．made

D．to make

可治疗开角型青光眼的β阻滞药是()

A.毛果芸香碱

B.普萘洛尔

C.毒扁豆碱

D.噻吗洛尔

E.新斯的明