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  1. 1 天前 · The European Economic Area ( EEA) was established via the Agreement on the European Economic Area, an international agreement which enables the extension of the European Union 's single market to member states of the European Free Trade Association. [4] The EEA links the EU member states and three of the four EFTA states (Iceland, Liechtenstein ...

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

    3 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 ...

  3. 3 天前 · Coal, oil, and natural gas remain the primary global energy sources even as renewables have begun rapidly increasing. Definition Renewable energy is usually understood as energy harnessed from continuously occurring natural phenomena. The International Energy Agency defines it as "energy derived from natural processes that are replenished at a faster rate than they are consumed".

  4. en.wikipedia.org › wiki › ISO_3166-1ISO 3166-1 - Wikipedia

    3 天前 · ISO 3166-1 ( Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest. It is the first part of the ISO 3166 standard published by the International Organization for Standardization .

  5. 3 天前 · In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.

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

    2 天前 · Phosphorus is a chemical element; it has symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth. It has a concentration in the Earth's crust of about one gram per kilogram (compare copper at about ...

  7. 1 天前 · The index was 9.8 in 1914 and peaked at 25.3 in 1920, before declining to 15.8 in 1933 and 1934—prices were only about three times as high as they had been 180 years earlier. [148] Inflation has had a dramatic effect during and after World War II : the index was 20.2 in 1940, 33.0 in 1950, 49.1 in 1960, 73.1 in 1970, 263.7 in 1980, 497.5 in 1990, 671.8 in 2000 and 757.3 in 2005.