中心发绀是由心、肺疾病导致（）；周围性发绀是由于（）所致。
参考答案：动脉血氧饱和度降低；周围循环血流障碍
— How could you have trusted the online dictionary that much in translating your resume?
— Well, I never expected it should translate it so ______.
A．literally
B．originally
C．sufficiently
D．professionally
鹅口疮是指（）。
A、口腔的脓疱疮
B、口腔的单纯疱疹
C、口腔的念珠菌病
D、口腔的HIV感染
