呼吸性碱中毒表现为：（）
A.HCO-3减少
B.HCO-3增高
C.PCO2增高
D.继发性H2CO3增多
E.PCO2下降
参考答案：E
如果8A=9B，那么B：A=8：9．______．
Don't be too _____ about things you are not supposed to know. [ ]
A. strange
B. amusing
C. curious
D. conscious
