催化剂的组成包括哪几部分？
参考答案：
包括活性组分、载体、助催化剂
大学组的比赛分为：1、（）组；2、体育院校（系）组；3、普通高校组。
His wife has left him, but he behaved _______ nothing had happened.
A．even though
B．as soon as
C．as though
D．as long as
