下列哪些符合COPD急性加重期行无创正压机械通气的基本条件
A.神志基本清楚,有合作能力,依从性好
B.分泌物少
C.自主咳嗽、咳痰能力较强
D.肠梗阻
参考答案:A, B, C
下列除哪一项外,其余结构在层次上是一致的( )
A.花
B.心脏
C.根
D.血液
Many more policeman should be sent to ________ them ________ some endangered animals. [ ]
A. prevent; to hunt
B. stop; hunting
C. keep; to hunt
D. keep; hunting