行为矫正的基本方法包括（）
A.强化
B.消退
C.示范
D.塑造
E.以上都是
参考答案：E
Yesterday I was about to leave for the market _____ my boss called and asked me to go back to the office at once．
A．when
B．while
C．as
D．because
玻璃棒跟丝绸摩擦后，它们带电的情况是[ ]
A．玻璃棒和丝绸都带正电
B．玻璃棒和丝绸都带负电
C．玻璃棒带正电，丝绸带负电
D．玻璃棒带负电，丝绸带正电
