轮胎的胎侧胶料主要要求()
A、耐磨、耐刺穿、耐撕裂
B、耐屈挠、耐疲劳
C、耐屈挠、耐疲劳、耐磨
D、耐磨
参考答案:B
注入式教学最本质的特征是 ( )
A.教师从头讲到尾
B.以讲授法为主
C.强调教师的主导作用
D.把学生看作是知识的容器
In the early 1960s, the famous Swiss psychologist Piaget established his theory of ______ development.