解:令dv=ydx,则有v=∫ydx=1/2y^2+C,故原方程的通解为y^2/2+C=x,即y=±√(2x-2C)...
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定制伴手礼是一种特殊的礼品,它们可以根据客户的需求进行个性化设计。它们不仅可以作为传递友谊和亲情的象征,而且还能够表明对特殊场合的尊重。 定制伴手礼有很多形式,其中最常用的是杯子、T恤、帽子、钥匙扣、文具盒和书签。你可以根据你要送出去的人来自定义这些物品,例如将你要送出去的人的名字印在T恤上,将你要送出去人最喜欢的图片印在杯子上或者将一些话语印在书签上。此外,如果你想要表达一些真诚感情时,可以考虑使用金银制品或者高端皮具作为伴手礼。 此外,如果想覆盖大量人员时,便利店也有很多选择。便利店中有各式各样的小巧方便耐用、功能性强并浅易理解并搭配不同风格装修之间保留一定风格一致性之间保留一定风格单...<未完>点击进入
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Good morning, everyone! It's my pleasure to be here and share my lesson with you. The title of my lesson is Unit 5 Let's Save the Elephant. This unit mainly consists of 3 parts. Part 1 is about an introduction to endangered species, in which we will learn some new words and expressions related t...<未完>点击进入
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Let's save the elephant Elephants are amazing animals, but their populations are decreasing. People hunt them for their tusks and for meat. They also lose their habitats as people cut down forests to make farms and homes. We must do something to save these gentle giants! One way we can help is by r...<未完>点击进入
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