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  1. 22 小時前 · 185 M4 Sherman tanks [14] 4,000–9,000 killed, wounded, missing, or captured [15] The Normandy landings were the landing operations and associated airborne operations on Tuesday, 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during World War II. Codenamed Operation Neptune and often referred to as D-Day, it is the ...

    • 6 June 1944
    • Allied victory [8]
  2. 1 天前 · The Battle of Mogadishu (Somali: Maalintii Rangers, lit. 'Day of the Rangers'), also known as the Black Hawk Down Incident, was part of Operation Gothic Serpent.It was fought on 3–4 October 1993, in Mogadishu, Somalia, between forces of the United States—supported by UNOSOM II—against the forces of the Somali National Alliance (SNA) and armed irregulars of south Mogadishu.

  3. 1 天前 · Avatar: The Last Airbender, also known as Avatar: The Legend of Aang in some regions, is an American animated fantasy action television series created by Michael Dante DiMartino and Bryan Konietzko and produced by Nickelodeon Animation Studio. Avatar is set in a largely Asiatic-inspired world in which some people can telekinetically manipulate one of the four elements—water, earth, fire or ...

  4. 2 天前 · Principal component analysis (PCA) is a linear dimensionality reduction technique with applications in exploratory data analysis, visualization and data preprocessing. The data is linearly transformed onto a new coordinate system such that the directions (principal components) capturing the largest variation in the data can be easily identified.

  5. en.wikipedia.org › wiki › SiliconSilicon - Wikipedia

    2 天前 · Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive ...

  6. en.wikipedia.org › wiki › CopperCopper - Wikipedia

    2 天前 · Copper is a chemical element; it has symbol Cu (from Latin cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a ...