One third of the country_____ covered with trees and the majority of the citizens______ black people.

A．is; are

B．is; is

C．are; are

D．are; is

新生儿窒息首先应采取的复苏措施是（）。

A．清理呼吸道

B．触觉刺激

C．机械通气

D．持续气道正压通气

E．应用复苏气囊正压通气加压给氧