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All the people present at the position, No one has ever seen this posture, When the reaction comes back, Someone used the water from the kettle to pour Jiang Yong's small arm, It means that I want to rinse him, but the result is not bad. The rinse is even more serious. The speed of blistering has not weakened, but also accelerated a lot. I later thought that this may be the trick of the Vietnamese army. It can make this toxic substance react violently with water, that is, to prevent us from rinsing with water. The intention is really too vicious!小镇上的商店街开了一家女仆咖啡厅“SEASIDE”，但跟时下流行的女仆咖啡厅不同的是，这家咖啡厅的店长是个对女仆文化一窍不通的老太婆，她仅仅是抱着“听说女仆咖啡厅很赚钱”的想法，让员工换上女仆装，将原本普通的咖啡厅改造成女仆咖啡厅。Proper use posture of drugs赵强子（金喜善 饰）曾经是人见人怕称霸一方的不良少女，如今，早已经“金盆洗手”的她藏起了所有锋芒，成为了一名母亲。让赵强子没有想到的是，自己的女儿吴雅兰（金裕贞 饰）竟然成为了校园暴力的受害者，更让赵强子难过的是，当她鼓动女儿为自己讨回公道时，女儿竟然选择了沉默。从来不按常理出牌的赵强子想出了一计，就这样，她入驻了女儿的班级，成为了女儿的同班同学。I follow the execution process of this small program: first, I take exp and "\ +" as parameters, call the calculation (String, String) method in the AbstractCalculator class, call split () of the same kind in the calculation (String, String), then call the calculation (int, int) method, enter the subclass from this method, after executing return num1 + num2, return the value to the AbstractCalculator class, assign it to result, and print it out. This just verifies our thinking at the beginning.The Interface Segmentation Principle (ISP) means that it is better to use multiple specialized interfaces than to use a single total interface. That is to say, don't let a single interface take on too many responsibilities, but should separate each responsibility into multiple specialized interfaces for interface separation. Too bloated an interface is a kind of pollution to the interface.