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2 天前 · Alpha Centauri (α Centauri, Alpha Cen, or α Cen) is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil Kentaurus (Alpha Centauri A), Toliman (B) and Proxima Centauri (C).[13] Proxima Centauri is the closest star to the Sun at 4.2465 light-years (1.3020 pc). Alpha Centauri A and B are Sun-like ...
1 天前 · Four UN members (Cuba, Liechtenstein, Monaco and North Korea) do not belong to the IMF hence their economies are not ranked below. Kosovo, despite not being a member of the United Nations, is a member of IMF. Taiwan is not a IMF member but it is still listed in the official IMF indices. Several leading GDP-per-capita (nominal) jurisdictions may ...
5 天前 · A plot of normal distribution (or bell-shaped curve) where each band has a width of 1 standard deviation – See also: 68–95–99.7 rule. Cumulative probability of a normal distribution with expected value 0 and standard deviation 1 In statistics, the standard deviation is a measure of the amount of variation of a random variable expected about its mean.
1 天前 · e. Camilla (born Camilla Rosemary Shand, later Parker Bowles, 17 July 1947) is Queen of the United Kingdom and the 14 other Commonwealth realms as the wife of King Charles III. [note 1] Camilla was raised in East Sussex and South Kensington in England and educated in England, Switzerland, and France. In 1973, she married British Army officer ...
1 天前 · The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to ...
5 天前 · Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
2 天前 · Gone with the Wind is a 1939 American epic historical romance film adapted from the 1936 novel by Margaret Mitchell.The film was produced by David O. Selznick of Selznick International Pictures and directed by Victor Fleming.Set in the American South against the backdrop of the Civil War and the Reconstruction era, the film tells the story of Scarlett O'Hara (Vivien Leigh), the strong-willed ...
