影响化学物质经呼吸道吸收的因素有（）
A.脂水分配系数
B.血-气分配系数
C.溶解度
D.肺通气量
E.气态物质的水溶性
参考答案：B, C, D, E
When you’re faced with failure， you need is to take courage and try again．
A．that
B．all
C．which
D．it
With all the things he needed _______, he went home happily.
A．bought
B．buying
C．to be bought
D．to buy
