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Advanced Mathematics (3rd Edition of Peking University): I don't read much books on linear algebra. I studied advanced mathematics when I was in school, but it doesn't matter. Just look at the first five chapters. Cooperate with the corresponding video and master the relevant knowledge of matrix and determinant.This is Pantanal, the largest tropical wetland in the world, and it is the home of thousands of animals. In this magical land, the pearl-like water and the swamp make waves and fog, just like a beautiful scenery of heaven on earth, but there are many hidden worries behind it. The fate of the animals living here is uncertain. Every year, the land here is sometimes submerged and sometimes plunged into drought. Even the most powerful animals cannot rest easy to survive in Pantanal. (Animal World 20190324 South American Wild World (III))Others:/gasp (gasp)　　某日，白雪公主和王子收到了矮人邀请他们参加聚会的消息，然而，发送这条消息的，却是王后本人。不知情的白雪公主和王子来到了聚会地点，遭到了敌人的袭击，最终，王子被抓成为了俘虏，白雪公主则在意外之中跌落瀑布。幸运的是，白雪公主得到了矮人的帮助，她决定同矮人合作，一起踏上了解救王子的旅途。最终，白雪公主能否揭露王后的阴谋，顺利救出心上人呢？(3) If a ship windy on the port side sees a ship on the windward side and cannot determine whether the ship is windy on the port side or on the starboard side, give way to the ship.* Author: Ren Zixing, please indicate from FreeBuf.COM for reprinting.