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? Generally speaking, the factory mode is suitable: whenever a large number of products need to be created and have a common interface, they can be created through the factory method mode. Of the above three modes, the first cannot create the object correctly if the incoming string is wrong, and the third does not need to instantiate the chemical factory class compared with the second, so in most cases, we will choose the third-static factory method mode. ?季木霖又警告了一句，才开始落笔。Prepare contingency plans in advanceSuch as XX version!《怒火英雄》是由剧酷传播出品的热血英雄剧，由毛卫宁、张彤、侯京龙执导，王雷、邓家佳、霍政谚、乔乔等出演。Therefore, the problems brought by XSS should be solved by XSS defense scheme.The network cable is the transmission medium. A computer can correspond to multiple IP addresses. In fact, the network card interface of a computer corresponds to one IP address. If the computer has two network cards, then the computer can have two IP addresses!