A:提高反应物的平衡转化率
B:以同样程度改变正逆反应的速率
C:增大正反应速率,减小逆反应速率
D:改变平衡混合物的组成
—Sorry, Mr. Clark. I won't do it again.
—Which of the two cameras are you going to buy?
— I'll buy______ of them because I want to give one to my best friend.