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資料來源：臺北市食材登錄平台
2 天前 · Hydrogen peroxide (H 2 O 2) is a nonplanar molecule with (twisted) C 2 symmetry; this was first shown by Paul-Antoine Giguère in 1950 using infrared spectroscopy.Although the O−O bond is a single bond, the molecule has a relatively high rotational barrier of 386 cm −1 (4.62 kJ/mol) for rotation between enantiomers via the trans configuration, and 2460 cm −1 (29.4 kJ/mol) via the cis ...
2 天前 · The monarch butterfly or simply monarch ( Danaus plexippus) is a milkweed butterfly ( subfamily Danainae) in the family Nymphalidae. [6] Other common names, depending on region, include milkweed, common tiger, wanderer, and black-veined brown. [7] It is among the most familiar of North American butterflies and an iconic pollinator, [8] although ...
2 天前 · A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk -producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
3 天前 · TSMC was the first foundry to market 7-nanometre and 5-nanometre (used by the 2020 Apple A14 and M1 SoCs, the MediaTek Dimensity 8100, and AMD Ryzen 7000 series processors) production capabilities, and the first to commercialize ASML 's extreme ultraviolet (EUV) lithography technology in high volume.
2 天前 · where the vertical bars denote the absolute value.This is an example of the (ε, δ)-definition of limit. If the function is differentiable at , that is if the limit exists, then this limit is called the derivative of at .Multiple notations for the derivative exist. The derivative of at can be denoted ′ (), read as "prime of "; or it can be denoted (), read as "the derivative of with respect ...
2 天前 · The Great Pyramid of Giza [a] is the largest Egyptian pyramid. It served as the tomb of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom. Built c. 2600 BC, [3] over a period of about 27 years, [4] the pyramid is the oldest of the Seven Wonders of the Ancient World, and the only wonder that has remained largely intact.
2 天前 · Gone with the Wind is a 1939 American epic historical romance film adapted from the 1936 novel by Margaret Mitchell.The film was produced by David O. Selznick of Selznick International Pictures and directed by Victor Fleming.Set in the American South against the backdrop of the Civil War and the Reconstruction era, the film tells the story of Scarlett O'Hara (Vivien Leigh), the strong-willed ...
