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2 天前 · The Northrop B-2 Spirit, also known as the Stealth Bomber, is an American heavy strategic bomber, featuring low-observable stealth technology designed to penetrate dense anti-aircraft defenses.
2 天前 · Amyotrophic lateral sclerosis ( ALS ), also known as motor neurone disease ( MND) or Lou Gehrig's disease in the United States, is a rare but terminal neurodegenerative disorder that results in the progressive loss of both upper and lower motor neurons that normally control voluntary muscle contraction. [3] .
6 天前 · Sulfuric acid ( American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling ), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, and hydrogen, with the molecular formula H2SO4. It is a colorless, odorless, and viscous liquid that is miscible with water. [6]
6 天前 · More formally, the uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the product of the accuracy of certain related pairs of measurements on a quantum system, such as position, x, and momentum, p. [1] .
2 天前 · Richard Wagner. Wilhelm Richard Wagner ( / ˈvɑːɡnər / VAHG-nər; [1] [2] German: [ˈʁɪçaʁt ˈvaːɡnɐ] ⓘ; 22 May 1813 – 13 February 1883) was a German composer, theatre director, polemicist, and conductor who is chiefly known for his operas (or, as some of his mature works were later known, "music dramas"). Unlike most opera ...
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. [165] [166] 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).
2 天前 · Blockbuster Video [5] is an American multimedia brand and former rental store chain. The business was founded by David Cook in 1985 as a single home video rental shop, but later became a public store chain featuring video game rentals, DVD-by-mail, streaming, video on demand, and cinema theater. [6] The logo was designed by Lee Dean at the ...
