sử dụng quy luật lượng chất để chứng tỏ rằng sự phát triển của sự vật hiện tượng không phải là đường thẳng

c. troops marched forward in close formation against newer, more accurate weapons

was a long, primarily nonviolent series of events to bring full civil rights and equality under the law to all americans. the era has had a lasting impact on united states society, in its tactics, the increased social and legal acceptance of civil rights, and in its exposure of the prevalence and cost of racism. in the south violence and fraud in southern elections from 1868 to 1876, which had reduced black voter turnout and enabled southern white democrats to regain power in state legislatures across the south

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a case involving the laws of a single state.