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First of all, the cost of obtaining customers on a large scale remains high. Although parents' awareness of online learning has improved significantly due to the market for online children's English, parents' trust in online learning still needs to be improved.Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.由《暖春》原班人马创作，乌兰塔娜执导的温情励志大戏《葵花进城》，讲述一个朴实善良的农村女孩“葵花”，为了给进城上大学的男友付学费，独自进城打工赚钱，男友却爱上了另一个女孩，“葵花”遭遇男友劈腿后被男友狠心抛弃，内心善良的她却依然再为了最新电影供男友上学打工赚钱，最终男友回心转意，终究回到“葵花”身边。When the patient is handed over to the hospital and the corpse is handed over to the funeral home, who will give the psychological pain? Who will ease people's psychological pressure when facing the death of their loved ones? How should I understand death? Huang Weiping began to think about this problem.When the poor think about buying a house, they first consider: how much I have in savings and how much my monthly income is, and then calculate in reverse whether they should buy a house and what kind of house they should buy. When the rich think about buying a house, they first consider: Do I want to buy a house or not and what kind of house do I want to buy? Then calculate, how much is still missing and how to solve it.This is the author's tank skill match:漫画《不伦食堂》将推出日剧，漫画是一个有老婆的35岁上班族男主角，在出差工作的时候与日本各地的美食以及小姐姐邂逅，在品尝完美食后，男主还是和小姐姐做了相当深入的了解。