题目内容

教师把实物、教具呈示给学生看，或者向学生作示范性实验，使学生通过________，从而获得知识、发展能力的方法，叫做演示法。

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Frederick Douglass' s_________ is an autobiography, relating the archetypal story of African Americans escaping from their cruel and wicked white masters to emancipation.

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