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2. You must first sign up for Nanjing Social Security Training (the training duration is 1 hour, please sign in on time) before you can apply for the CA certificate. The clerks registered on Nanjing Social Security Website, the trainees and the CA certificate managers must be the same person (other people can also bring the relevant certificates of the clerks and enterprise information to handle the CA, and the managers on the application form still fill in the clerks themselves).老子是一位出色的智者，他所撰的《道德经》是一个知识宝库，内藏的哲理使不少迷惘的心灵得到解脱，难怪几年前的纽约时报把老子列为古今十大作家之首。　　第一季《优步之战》改编自Mike Isaac的纪实文学《热血野心/恣意橫行(台) Super Pumped: The Battle for Uber》，由《亿万》的两位主创Brian Koppelman及 David Levien负责。Go and see, won't be disappointed!　　莉可在深界四层中了穿弹兽的毒。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.