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In reality, we often encounter multi-classification learning tasks. Some two-classification learning methods can be directly extended to multi-classification, but in more cases, we use two-classification learners to solve multi-classification problems based on some basic strategies. Therefore, the fundamental method of multi-classification problem is still the two-classification problem.好了，诸位请起。…,他真的能够带领大军出巴蜀？樊哙愕然站在原地，有些不能相信自己的耳朵。他们比葫芦差的，只是年龄罢了，平日也是喜爱练武的，尤其是青山，疯狂起来跟葫芦竟然有的一比。大学女生白墨桃在课外活动中于雷峰塔误入豪门公子尹苍冬的结界，而尹苍冬实际身份却是隐藏于人类世界的神羽族继承人，尹苍冬认定白墨桃是宿敌蛇族一员，对白墨桃展开...A low temperature stop valve, Unlike Example 1, Comprises a valve body 1 and a valve cover 2, A valve stem 3 is arrange in that valve body 1, One end of the valve stem 3 is provided with a valve disc 4, The other end of the valve stem 3 is provided with an adjusting handwheel 5, A low portion of that disc 4 is provided with a guide sleeve 6, The guide sleeve 6 is fixed by means of a connecting piece and a spring pad 8, Between that disc 4 and the guide sleeve 6 is provide a valve seat 7, A packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, the O-ring 10 is further arranged at the upper part of the packing assembly 9, the upper part of the O-ring 10 is provided with a packing gland 11, the valve body 1 is provided with an arc-shaped end face 12 which forms a line seal between the valve body 1 and the valve seat 7, and the contact end of the valve disc 4 and the valve seat 7 is provided with a water grain surface 41, the packing assembly 9 comprises a flexible graphite packing layer.陈启向陈文羽几人告别。