严重休克等原因引起末梢循环障碍的患者,即使动脉血氧分压尚正常,也可出现发绀,称作( )。而真正由于动脉血氧饱和度降低引起的发绀,称作( )。
参考答案:外周性发绀 中央性发绀
3. In an open society, people enjoy complete freedom of different religious ______, as long as they don’t do harm to the stability of the society and its people.
A.ideas
B.beliefs
C.believes
D.origins
把岩屑携带出井底要经过几个过程()
A.1
B.2
C.3
D.4