The disappearance of dinosaurs made _______ the evolution and dominance of mammals on the earth.

A．it was possible

B．it possible

C．possible to be

D．possible

下列药物经肾脏代谢最少的是

A．格列本脲

B．格列吡嗪

C．格列齐特

D．格列波脲

E．格列喹酮