题目内容
___________made a speech named "I have a dream".
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The____________, also known as the Women’s Movement, Women’s Liberation, Women’s Lib, refers to a series of campaigns for reforms on issues such as reproductive right, domestic violence, maternity leave, equal pay, women’s suffrage, sexual harassment and sexual violence.
___________was a student protest which took place during the 1964-1965 school year on the campus of the University of California.
硅二极管死区电压（开启电压）为0.7V
对于实际二极管，只要加在二极管两端电压大于0，二极管一定导通
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