3.有关火药的英语作文80词左右Gunpowder, also known since the late 19th century as black powder, was the first chemical explosive and the only one known until the mid-1800s. It is a mixture of sulfur, charcoal, and potassium nitrate (saltpeter)—with the sulfur and charcoal acting as fuels, while the saltpetre works as an oxidizer.Because of its burning properties and the amount of heat and gas volume that it generates, gunpowder has been widely used as a propellant in firearms and as apyrotechnic composition in fireworks 。
4.用英文写一段关于火药的资料Gunpowder was invented by the Chinese people, it has been one thousand years ago. The research began from the ancient alchemy gunpowder
The Tang Dynasty alchemists in Karata Muneyongjun first year (682 years) pioneered the sulfur volt fire method, with sulfur, saltpeter, and research into a powder, coupled with the soap slot (containing carbon). Tang Xian Zong Yuan and three years (808 years) and a fire like Cephas, with saltpeter, sulfur and aristolochic (containing carbon) with firing. These two formulations, are the three kinds of spices mixed together, we have the ingredients of gunpowder. The invention of the country has been more than one thousand years ago. The research began from the ancient alchemy gunpowder.
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