斯金纳认为强化的作用在于改变同类反应在将来发生的概率。()
地球南北极上空,经常出现极光,下列关于极光成因的正确说法是( )
皮亚杰认为,人从其生物方面继承了()
在Excel中,工作簿一般是由下列哪一项组成?()
Which of the following does a teacher want his / her students to develop if he / she guides them to takenotes key words, abbreviations and symbols?