我们在教学“直角三角形”时,总是变动直角的位置,以突出其关键特征,是使用了()
A.肯定实例和否定实例
B.变式教学
C.比较教学
D.分类教学
正确答案是B
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Passage One Computers should be in the schools. Theyhave the potential to accomplish great things. With the right software, theycould help make science tangible or teach neglected topics like art and music.They could help