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2 天前 · The McDonnell Douglas F-4 Phantom II [N 1] is an American tandem two-seat, twin-engine, all-weather, long-range supersonic jet interceptor and fighter-bomber originally developed by McDonnell Aircraft for the United States Navy. [2] .
- 27 May 1958
- McDonnell Douglas Phantom FG.1/FGR.2
- 5,195
2 天前 · The McDonnell Douglas F/A-18 Hornet is an all-weather supersonic, twin-engine, carrier -capable, multirole combat aircraft, designed as both a fighter and attack aircraft (hence the F/A designation ). Designed by McDonnell Douglas and Northrop, the F/A-18 was derived from the latter's YF-17 in the 1970s for use by the United States Navy and ...
- 18 November 1978; 44 years ago
- F/A-18A/B/C/D: 1,480
1 天前 · Dawn Michelle Staley (born May 4, 1970)[1] is an American basketball Hall of Fame player and coach who is currently the head coach for the reigning champion South Carolina Gamecocks women's team. Staley won three Olympic gold medals with Team USA as a player and later was head coach of another U.S. gold-medal winning team. Staley was elected ...
5 天前 · Toni Michele Braxton (born October 7, 1967) is an American singer, songwriter, actress and television personality.She has sold over 70 million records worldwide and is one of the best-selling female artists in history. Braxton has won seven Grammy Awards, nine Billboard Music Awards, seven American Music Awards, and numerous other accolades.
5 天前 · Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features. [1] [12] There are three types of Down syndrome, the ...
- Third copy of chromosome 21
- Mostly at conception, rarely after fertilization
