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  1. 6 天前 · 1969–1991. Number built. 712. The Grumman F-14 Tomcat is an American carrier-capable supersonic, twin-engine, two-seat, twin-tail, all-weather-capable variable-sweep wing fighter aircraft. The Tomcat was developed for the United States Navy 's Naval Fighter Experimental (VFX) program after the collapse of the General Dynamics-Grumman F-111B ...

  2. 4 天前 · A map of Europe, with ISO 3166-1 alpha-2 codes in place of the full names of countries and other territories. 'Exceptional reservations' codes CQ, EU and UK are not shown. ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories ...

  3. en.wikipedia.org › wiki › BitcoinBitcoin - Wikipedia

    4 天前 · Bitcoin (abbreviation: BTC; sign: ) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that guarantees the ...

  4. en.wikipedia.org › wiki › OECDOECD - Wikipedia

    2 天前 · The Organisation for Economic Co-operation and Development (OECD; French: Organisation de coopération et de développement économiques, OCDE) is an intergovernmental organisation with 38 member countries,[1][4] founded in 1961 to stimulate economic progress and world trade. It is a forum whose member countries describe themselves as ...

  5. 6 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.

  6. 2 天前 · Eurofighter Typhoon variants. The Eurofighter Typhoon is a European multinational twin-engine, supersonic, canard delta wing, multirole fighter. [3] [4] The Typhoon was designed originally as an air-superiority fighter [5] and is manufactured by a consortium of Airbus, BAE Systems and Leonardo that conducts the majority of the project through a ...

  7. en.wikipedia.org › wiki › AsiaAsia - Wikipedia

    2 天前 · Etymology Ptolemy's Asia The term "Asia" is believed to originate in the Bronze Age placename Assuwa (Hittite: 𒀸𒋗𒉿, romanized: aš-šu-wa) which originally referred only to a portion of northwestern Anatolia.The term appears in Hittite records recounting how a confederation of Assuwan states including Troy unsuccessfully rebelled against the Hittite king Tudhaliya I around 1400 BCE.