曾经被一条大狗咬过的人，看见非常小的狗也可能产生恐惧。这是( )
A．刺激泛化
B．刺激分化
C．刺激获得
D．刺激消退
参考答案：A
There are more people who are obese today than 20 years ago.
A．gainfully employed
B．upwardly mobile
C．excessively overweight
D．privately educated
澶渊之盟
