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Explain that in the OrderPizza method, we do a lot of things, including calling the CreatePizza method to generate a desired pizza, and then doing a series of operations on the pizza. The key point is that Pizza is defined as an abstract class, which means that in the OrderPizza method we don't care what type this Pizza is at runtime, in other words, this is decoupling. The coupling between PizzaStore and Pizza is uncoupled.Methods:For example, in the back-end system, There are tabular data, Each piece of data is preceded by a check box button, When you click the check box button, After obtaining the id, it needs to be passed to the server to send an ajax request. The server needs to record this data, To request, if we send an http request to the server every time we click, For the server, the pressure is relatively high and the network requests are frequent. However, if the real-time data of the system is not very high now, we can collect all ID for a period of time (e.g. 2-3 seconds) through a proxy function and send AJAX requests to the server at one time. Relatively speaking, the network requests are reduced and the server pressure is reduced.马镫投入使用之后，一定程度上可以弥补战马素质上的不足。小葱则派人给葫芦、刘井儿送信，并在王府布置安排。讲述娜迦之神和人类的爱情故事！泰版白蛇传，一个男人和一条美丽的小蛇的爱将如何继续?...都市爱情电影《感动她77次》为《原谅他77次》续集。恢复单身的Eva（蔡卓妍 饰）与泰国红星Marvel（马里奥 饰）偶遇并互有好感，而Adam （周柏豪 饰）仍希望通过努力换来Eva的第78次原谅。为完成身患绝症的母亲（惠英红 饰）心愿，Eva考虑走进婚姻。Adam能否趁机挽回真爱呢？