风湿性心脏病时最易受累的心脏瓣膜是()
A. 左房室瓣
B. 右房室瓣
C. 主动脉瓣
D. 肺动脉瓣
E. 左房室瓣和右房室瓣
The class ()so happy,for everyone smiles to you.
A. is
B. are
C. being
D. ha
遭遇蛇类咬伤,最先采取的应急措施是()
A. 就地取材将伤口捆扎
B. 就地取材在伤口的远心端捆扎
C. 用绳索等在伤口的近心端捆扎
D. 用布带等在伤口的近心端5cm处捆住
E. 就地取材在伤口的近心端10cm处捆住