mm糖糖豆
超电磁炮，中文又称电磁炮，包括线圈炮、磁轨炮等。就是利用超强的电磁铁，将导体制成的炮弹打出去的武器，一般用在战舰上，优点是威力大、射程远、精度高且成本小。在动漫《某科学的超电磁炮》以及《魔法禁书目录》中，御坂美琴的的外号叫做“超电磁炮”，其英文名称为Railgun也就是磁轨炮。磁轨炮的原理是安培力，不过方式与磁悬浮列车的动力有些区别。电流在磁场中会受到安培力的作用，大小为F=BILsinθ，因此有电流通过的物体在磁场中会产生加速度（只要电流方向与磁场方向有夹角）。磁轨炮有两根通电的长金属导轨产生极强的磁场，同时导轨中的部分电流通过金属弹丸，从而使弹丸加速，最终在出膛时拥有极高的初速度。尽管御坂美琴的超电磁炮没有金属导轨，但她能产生极高的电压击穿空气以形成等离子体（电浆体），代替了导轨的作用，原理和磁轨炮相同。Super electromagnetic gun, Chinese also called electromagnetic gun, including coil gun, magnetic rail gun etc.. Is the use of strong electromagnet, the weapon will conductor shells hit out, generally used in warship, has the advantages of big power, long range, high accuracy and low cost.在动漫《某科学的超电磁炮》以及《魔法禁书目录》中，御坂美琴的的外号叫做“超电磁炮”，其英文名称为Railgun也就是磁轨炮。磁轨炮的原理是安培力，不过方式与磁悬浮列车的动力有些区别。电流在磁场中会受到安培力的作用，大小为F=BILsinθ，因此有电流通过的物体在磁场中会产生加速度（只要电流方向与磁场方向有夹角）。磁轨炮有两根通电的长金属导轨产生极强的磁场，同时导轨中的部分电流通过金属弹丸，从而使弹丸加速，最终在出膛时拥有极高的初速度。尽管御坂美琴的超电磁炮没有金属导轨，但她能产生极高的电压击穿空气以形成等离子体（电浆体），代替了导轨的作用，原理和磁轨炮相同。 In the cartoon "a scientific super electromagnetic gun" and "toaru majutsu no index", Misaka Miko's nickname is "the super electromagnetic gun", the English name for the Railgun is magnetic rail gun. The principle of magnetic rail gun is the ampere force, but the power and maglev train differently. The current will be the ampere force in a magnetic field, the size of F=BILsin θ, therefore the current through the object will generate acceleration in a magnetic field (as long as the current direction and magnetic field direction angle). Railguns have long metal rail two electricity generated magnetic field, at the same time in the guide rail part of the current through the metal shell, so that the initial velocity of projectile acceleration, finally has a high muzzle. Although the super electromagnetic gun Misaka Miko without the metal guide rail, a breakdown voltage of air but she can produce very high to form plasma (plasma), instead of the guide role, principle and railguns are the same望采纳
陈709479558
The AK-47 (contraction of Russian: Автомат Калашникова образца 1947 года; Avtomat Kalashnikova obraztsa 1947 goda; "Kalashnikov's automatic rifle model of year 1947") is a 7.62 mm assault rifle developed in the Soviet Union by Mikhail Kalashnikov in two versions: the fixed stock AK-47 and the AKS-47 (S—Skladnoy priklad) variant equipped with an underfolding metal shoulder stock.Design work on the AK began in 1944. In 1946 the rifle was presented for official military trials, and a year later the fixed stock version was introduced into service with select units of the Red Army (the folding stock model was developed later). The AK-47 was officially accepted by the Soviet Armed Forces in 1949. It is also used by the majority of the member states of the former Warsaw Pact. The AK-47 was also used as a basis for the development of many other types of individual and crew-served firearms.It was one of the first true assault rifles and, due to its durability, low production cost and ease of use, remains the most widely used assault rifle in the world - so much so that more AK-type rifles have been produced than all other assault rifles combinedAK - 47（俄语：收缩АвтоматКалашниковаобразца1947года；avtomat拉什尼科娃obraztsa1947戈；“卡拉斯尼柯夫自动步枪模型1947”）是一个7.62毫米突击步枪在苏联的米哈伊尔冲锋枪2版本：固定股票AK - 47和aks-47（s-skladnoypriklad）变配备一underfolding金属枪托。设计工作的公司开始在1944。1946步枪提出正式的军事审判，并在一年后固定库存版本引入服务与选择的红军部队（折叠股票模型开发后）。AK - 47正式接受了苏联武装力量在1949。它还可用于大多数会员国的前华沙条约。AK - 47也被用来作为发展的基础，许多其他类型的个人和重武器。它是第一个真正的突击步枪和，由于其耐久性，生产成本低，使用方便，仍然是最广泛使用的突击步枪
优质英语培训问答知识库
