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。
Frederick Douglass' s_________ is an autobiography, relating the archetypal story of African Americans escaping from their cruel and wicked white masters to emancipation.
__________ was one of the founders of the black theater in the Federal Theater Project during the Depression.
__________ and _________are two of the most important female African American novelists.