不易引起呼吸性酸中毒的原因是（）
A.呼吸性中枢抑制
B.肺泡通气量减少
C.气道阻塞
D.肺泡气体弥散障碍
E.吸入气中CO2浓度过高
参考答案：D
We from his red face that he had been lying. [ ]
A. came to conclusion
B. draw a conclusion
C.jumped to a conclusion
D. reached to a conclusion
清代建筑的基本模数通常采用“斗口”和“檐柱径”。
