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1 天前 · Taekwondo (/ ˌ t aɪ k w ɒ n ˈ d oʊ, ˌ t aɪ ˈ k w ɒ n d oʊ, ˌ t ɛ k w ə n ˈ d oʊ /; Korean: 태권도; [t ʰɛ.k wʌ n.d o] ), also spelled tae kwon do or taekwon-do, is a Korean martial art and combat sport involving punching and kicking techniques. The literal translation for taekwondo is "kicking", "punching", and "the art or way of". ...
4 天前 · Søren Aabye Kierkegaard ( / ˈsɒrən ˈkɪərkəɡɑːrd / SORR-ən KEER-kə-gard, US also /- ɡɔːr / -gor, Danish: [ˈsɶːɐn ˈɔˀˌpyˀ ˈkʰiɐ̯kəˌkɒˀ] ⓘ; [8] 5 May 1813 – 11 November 1855 [9]) was a Danish theologian, philosopher, poet, social critic, and religious author who is widely considered to be the first ...
2 天前 · The gunfight at the O.K. Corral pitted lawmen against members of a loosely organized group of cattle rustlers and horse thieves called the Cowboys. While lasting less than a minute on October 26, 1881, the gunfight has been the subject of books and films into the 21st century. Taking place in the aptly-named Tombstone, Arizona Territory, the ...
1 天前 · Ayatollah Ruhollah Musavi Khomeini (17 May 1900 or 24 September 1902 – 3 June 1989) was an Iranian Islamic revolutionary, politician, and religious leader who served as the first supreme leader of Iran from 1979 until his death in 1989.He was the founder of the Islamic Republic of Iran and the main leader of the Iranian Revolution, which overthrew Mohammad Reza Pahlavi and ended the Iranian ...
23 小時前 · In a DNA double helix, each type of nucleobase on one strand bonds with just one type of nucleobase on the other strand. This is called complementary base pairing.Purines form hydrogen bonds to pyrimidines, with adenine bonding only to thymine in two hydrogen bonds, and cytosine bonding only to guanine in three hydrogen bonds. . This arrangement of two nucleotides binding together across the ...
2 天前 · The 828-metre (2,717 ft) tall Burj Khalifa in Dubai has been the tallest building since 2010. The Burj Khalifa has been classified as megatall. A diagram showing the tallest buildings as of 2024 This is a list of the tallest buildings.Tall buildings, such as skyscrapers, are intended here as enclosed structures with continuously occupiable floors and a height of at least 340 metres (1,120 ft).
1 天前 · Wireless network technologies. In telecommunications, 5G is the fifth-generation technology standard for cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the successor to 4G technology that provides connectivity to most current mobile phones. Like its predecessors, 5G networks are cellular networks, in ...
