题目内容

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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__________ 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.

人本管理理论认为人是_________的核心因素。

A增益
B固有频率
C阻尼比
D相频特性

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