男性，70岁。确诊为慢性阻塞性肺病20年，加重1周入院。入院时神清，血气分析Pa0240mmHg，PaC0275mmHg。吸入40%浓度氧后，患者出现呼之不应，查动脉血气分析示PaO285mmHg，PaCO2100mmHg。患者出现意识障碍的原因是（）
A.感染加重
B.气道阻力增加
C.呼吸中枢受到抑制
D.脑血管意外
E.心力衰竭致脑缺血
参考答案：C
| 读下面短文，先理解大意，再选词填空，可重复用。 | |
___________ two bedrooms, a living room, a kitchen and a bathroom. I ___________ a baby monkey. I have my own room now. It ___________ small and nice. There ___________ a bed, green curtains and a big closet. There is ___________ end table and a mirror. There is ___________ air-conditioner over the bed. I ___________ my new room very much. |