单选题:学生不是空着脑子走进教室的。这一观点源自于( )

题目内容:
学生不是空着脑子走进教室的。这一观点源自于( ) A.联结学习理论
B.认知-结构理论
C.有意义接受学习理论
D.建构主义学习理论

参考答案:

下列关于机械台班折旧费的说法不正确的是(  )。

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权益乘数与财务杠杆呈正比。(  )

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