刺激分化
参考答案：刺激分化：通过选择性强化和消退使有机体学会对条件刺激和与条件刺激相类似的刺激做出不同的反应。
If you want to work for our country in the future,_____ you should have strong body and rich
knowledge. [ ]
A. at first
B. first of all
C. for the first time
D. after all
A．成果
B．结果
C．后果
D．结论
