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1 天前 · Serena Jameka Williams (born September 26, 1981)[1] is an American former professional tennis player. Widely regarded as one of the greatest tennis players of all time,[a] she was ranked world No.1 in singles by the Women's Tennis Association (WTA) for 319 weeks, including a joint-record 186 consecutive weeks, and finished as the year-end No.1 ...
1 天前 · The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, that started in 1947, two years after the end of World War II and lasted to 1991, the fall of the Soviet Union. The term cold war is used because there was no large-scale fighting ...
1 天前 · Georgia is a mountainous country situated almost entirely in the South Caucasus, while some slivers of the country are situated north of the Caucasus Watershed in the North Caucasus. [164] [165] The country lies between latitudes 41° and 44° N, and longitudes 40° and 47° E, with an area of 67,900 km 2 (26,216 sq mi).
3 天前 · Alzheimer's disease ( AD) is a neurodegenerative disease that usually starts slowly and progressively worsens, [2] and is the cause of 60–70% of cases of dementia. [2] [15] The most common early symptom is difficulty in remembering recent events. [1] As the disease advances, symptoms can include problems with language, disorientation ...
1 天前 · Sigmund Freud (/ f r ɔɪ d / FROYD, German: [ˈziːkmʊnt ˈfrɔʏt]; born Sigismund Schlomo Freud; 6 May 1856 – 23 September 1939) was an Austrian neurologist and the founder of psychoanalysis, a clinical method for evaluating and treating pathologies seen as originating from conflicts in the psyche, through dialogue between patient and psychoanalyst, and the distinctive theory of mind and ...
2 天前 · Silicon Valley is a region in Northern California that is a global center for high technology and innovation. Located in the southern part of the San Francisco Bay Area, it corresponds roughly to the geographical area of the Santa Clara Valley. [1] [2] [3] The term "Silicon Valley" refers to the area in which high-tech business has proliferated ...
1 天前 · Shawn Corey Carter (born December 4, 1969), known professionally as Jay-Z,[a] is an American rapper, record producer, and entrepreneur.[8] Known for his involvement in the success of other artists,[9][10] he was named the greatest rapper of all time by Billboard and Vibe in 2023.[11] He served as the president and chief executive officer of ...
