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1 天前 · Democracy (from Ancient Greek: δημοκρατία, romanized: dēmokratía, dēmos 'people' and kratos 'rule')[1] is a system of government in which state power is vested in the people or the general population of a state.[2] Under a minimalist definition of democracy, rulers are elected through competitive elections while more expansive ...
16 小時前 · Abraham Lincoln (/ˈlɪŋkən/ LING-kən; February 12, 1809 – April 15, 1865) was an American lawyer, politician, and statesman who served as the 16th president of the United States from 1861 until his assassination in 1865. Lincoln led the United States through the American Civil War, defending the nation as a constitutional union ...
1 天前 · Reading of the United States Constitution of 1787. The Constitution of the United States is the supreme law of the United States. [3] It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution delineates the national frame and constrains the powers of the ...
2 天前 · On June 16, 1866, Secretary of State William Seward transmitted the Fourteenth Amendment to the governors of the several states for its ratification. State legislatures in every formerly Confederate state, with the exception of Tennessee, refused to ratify it. This refusal led to the passage of the Reconstruction Acts.
6 天前 · Recorded 4 October 1994. Nelson Rolihlahla Mandela ( / mænˈdɛlə / man-DEH-lə; [1] Xhosa: [xolíɬaɬa mandɛ̂ːla]; born Rolihlahla Mandela; 18 July 1918 – 5 December 2013) was a South African anti-apartheid activist, politician, and statesman who served as the first president of South Africa from 1994 to 1999. He was the country's ...
1 天前 · Georgia is a mountainous country situated almost entirely in the South Caucasus, while some slivers of the country are situated north of the Caucasus Watershed in the North Caucasus. [164] [165] The country lies between latitudes 41° and 44° N, and longitudes 40° and 47° E, with an area of 67,900 km 2 (26,216 sq mi).
1 天前 · Probability theory. In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is. The parameter is the mean or expectation of the distribution (and also its median and mode ), while ...
