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2 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 ...
1 天前 · The National Broadcasting Company (NBC) is an American commercial broadcast television and radio network serving as the flagship property of the NBC Entertainment division of NBCUniversal, a subsidiary of Comcast. The headquarters of NBC is in New York City at the Comcast Building. NBC also has offices in Chicago at the NBC Tower. Founded in ...
2 天前 · The Public Broadcasting Service (PBS) is an American public broadcaster and non-commercial, free-to-air television network based in Crystal City, Virginia. PBS is a publicly funded nonprofit organization and the most prominent provider of educational programs to public television stations in the United States, distributing shows such as Frontline, Nova, PBS NewsHour, Masterpiece, Sesame Street ...
2 天前 · Early history Manila galleon in the Marianas and Carolinas, c. 1590 Boxer Codex Palau was originally settled between the 3rd and 2nd millennia BCE, most likely from the Philippines or Indonesia. Sonsorol was sighted by the Spanish as early as 1522, when the Spanish mission of the Trinidad, the flagship of Ferdinand Magellan's voyage of circumnavigation, sighted two small islands around the 5th ...
2 天前 · Philosophy (φιλοσοφία, 'love of wisdom', in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, value, mind, and language. It is a rational and critical inquiry that reflects on its own methods and assumptions. Historically, many of the individual sciences ...
3 天前 · The Trail of Tears was the forced displacement of approximately 60,000 people of the "Five Civilized Tribes" between 1830 and 1850, and the additional thousands of Native Americans within that were ethnically cleansed by the United States government. As part of Indian removal, members of the Cherokee, Muscogee, Seminole, Chickasaw, and Choctaw nations were forcibly removed from their ancestral ...
3 天前 · Incandescent light bulb. A 230-volt incandescent light bulb with a medium-sized E27 (Edison 27 mm) male screw base. The filament is visible as the mostly horizontal line between the vertical supply wires. A scanning electron microscope image of the tungsten filament of an incandescent light bulb. Elaborate light in Denver, Colorado.
