Since Pizza is still an abstract class, when we create a subclass of FactoryPizzaStore, we should also implement a specific subclass inherited from Pizza. If we only create a subclass of FactoryPizzaStore without a corresponding subclass of Pizza, what does our pizza shop sell?
爱情保卫战2021，节目把现实中青年男女在恋爱过程中遇到的各种困惑与矛盾搬上舞台，双方通过交流、沟通与争辩把内心的痛苦与困惑全盘托出。节目现场邀请情感导师为情侣提供理性分析、科学考量、恋爱指导和情感忠告，倡导正确的恋爱观、婚姻观、幸福观。同时也邀请明星夫妻等社会人士指导。
新人阿Pat（莫文蔚 饰）刚来这栋大楼的一间公司上班，遇到了前男友阿Ken（冯德伦 饰）。两人聊了一会儿，随后阿Pat乘电梯回公司。电梯内一名只有白衣女子，她蹲在地上不停说“对不起”，阿Pat觉得十分诡异。同事说可能是鬼节将至造成…
For the first point, we also often use it in our daily work, such as our Ajax request, which has a success and error callback function, and we can subscribe to Ajax success and error events. We don't care about the state of the object running asynchronously, we only care about success or error when we have to do something of our own ~
韩国MBC电视台新剧《归来的福丹芝》将于5月首播，讲述从白马上坠落的王子与江南大妈“福丹芝”之间发生的一系列故事。
