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MacTask Items:板栗往后一靠。In real life, China's income tax is divided into enterprise income tax, foreign-invested enterprises or foreign-invested enterprises income tax and personal income tax. For these three types of income tax, each is calculated in a different way. Personal income tax has a personal income tax calculation method, while enterprise income tax has its corresponding calculation method. If we do not adopt the policy mode to realize such a requirement, we will define an income tax class, which has an attribute to identify the type of income tax and a CalculateTax () method to calculate the tax. In this method, we need to judge the tax type and calculate the income tax for different tax types through if-else statements. Such an implementation can indeed solve this scenario, but such a design is not conducive to expansion. If the system needs to add an income tax in the later period, it has to go back and modify the CalculateTax method to add an additional judgment statement, which clearly violates the principle of "open-closed". At this time, we can consider using the strategic mode to solve this problem. Since the tax method is the changing part of this scenario, we can naturally think of abstracting the tax method at this time, which is also the essence of the implementation of the strategic mode.向田邦子以“爱”为主题，描绘了四个背离道德却又坚强、美丽的女人，遵循着原始的本性，去爱着别人的故事。毫无掩饰的无罪之爱，在现代复苏！本剧共分为4个故事，第一话，隔壁女子，讲述了隐藏在普通主妇表面下女人的嫉妒心；第二话，金鱼之梦，描绘了爱上有妇之夫的女人，幸福而悲伤的故事；第三话，三角波，已经决定结婚的女子，又碰上了另一个男人；第四话，爱这个字，细致地描绘了爱的残酷和温暖。　　面对昔日的恋人、妻子所承受的精神折磨，邵钧内心多次被动摇。但少年时的家破人去楼空的记忆蒙蔽了他原本善良的心。为了能够掌权安氏企业，邵钧费尽心机，倾尽才华。在与竞争对手宋氏集团的较量中，邵钧面对的不仅仅是商场上的竞争，更有情敌之间的较量。夜总会六周年庆，杨素卿的艳丽及高贵气质让所有宾客、尤其是天成企业的小开吴书怀眼睛为之一亮，不禁对素卿产生爱慕！素卿下班时，好友洪斌送素卿回家，洪斌一路上看出了素卿的不安，原来她在担心其二妹杨素云失踪一个多月的事情。同时在韩国郊外的山上，一辆跑车极速而上，车中是素云及其交往多年的男朋友王柏东，素云怒责柏东已经变心，柏东断然否认。双方在争执的时候，素云一不小心掉入山崖。柏东怕被人发现，随即驾车而去。书怀每晚必到酒廊，此事终于被书怀的父亲吴天成发觉而发生争执，而继母沈秋问及方知书怀迷恋夜总会的女孩，沈秋叫天成去找素卿谈判；事后素卿反而主动邀约书怀，书怀受宠若惊，和素卿情感进展迅速，此举引来爱慕素卿的洪斌默默担心。素卿对二妹素云的行踪多方查询后，猜测其男友柏东有所隐瞒，因此找来警察调查柏东，却未能查出任何蛛丝马迹，只得作罢，但素卿和三妹素芳决心继续追查……