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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."So to speak, But it was only later that we found out, At that time, the smell had just dispersed, At first it just smelled bad, Nothing special, But after a while, I found something was wrong. Anyone who smells this smell, Have severe dizziness and nausea discomfort, In a short time, someone couldn't help vomiting on the position. I smelled it only a few times, and then it was also painful to churn in my stomach. Not only was my stomach uncomfortable, but my eyes were also very swollen, as if I wanted to "earn" and open my eyes to "jump" out from the inside. At that time, I thought "broken". This was not the chemical weapons used by the Vietnamese army, was it? Looking back on the common sense of the field learned during the surprise study, remember that the Vietnamese army did not have chemical weapons that would cause similar reactions? However, at that time, I felt uncomfortable patronizing and did not think further.3.网络告密《镜子森林》，原剧名为《文化流氓》，2019年台湾职人剧，为民视年度旗舰型连续剧。本剧共分为三季，以新闻媒体生态为题材。本剧获文化部106年度旗舰型连续剧制作补助6330万元。于2018年11月30日开镜，2019年4月20日杀青。民视无线台于2019年12月1日首播、公视主频于12月7日播出。故事从「火线新闻」的新闻工作说起，面对官商勾结、威胁利诱，新闻记者如何秉持正义，坚持理想，写出最真实报导以及内心深层的人味情感。In popular terms, it is to use network node resources such as IDC server, personal PC, mobile phone, smart device, printer, camera, etc. to launch a large number of attack requests on the target, which leads to waste of network resources, congestion of link bandwidth, depletion of server resources and interruption of service, making it impossible to provide normal services to the outside world, and only game over can be announced. The detailed description is shown in the following figure:他还是不死心啊。Infrared circuit part