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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.如今张家因为大苞谷，又有结拜兄弟，又有儿媳妇，还有义父母，可见下官当初所想不无道理。《阿甘妙世界》是一出卡通喜剧，主角是住在平凡的虚构城市－艾尔摩镇却非常搞怪有趣的华特森蓝猫一家。大部分的故事围绕着这个家庭的日常生活发展。剧中内容融合现实场景，使用2D及3D绘图技术，少数角色是使用偶戏方式演出。有一天他们在那里遇到了一个叫鲍伯的神秘陌生人，和一个舞台剧剧本——“飞行教室”。随著创新的音乐和RAP歌词，它逐渐成了小鬼们学校圣诞节的独特表演。即使是叛逆的蒙娜都答应参加他们的表演，因为她从没遇过任何人像强纳森这么亲切。"Later things became more serious, The Vietnamese army attacked more than seven or eight times in a row. But it was almost halfway through the fire of the artillery group. Occasionally, sporadic ones escaped gunfire, Can't hide from our accurate shooting, Because the explosive power of the shells is very large, Apart from being killed by shrapnel at a long distance, It is normal for those who are closer to me to be blown to death without a whole body. At that time, because of the open terrain on our side, So the superior is more 'generous', In order to better understand the enemy situation and give full play to the terrain advantage of position 142, All the front-line officers and soldiers in our squad leader and above positions are equipped with binoculars, which is absolutely not treated in other positions. If other positions want to have their own binoculars, they have to be a deputy platoon leader. As a squad leader like me, I am still very proud to be able to observe the enemy's situation with binoculars.失忆的夕小灰从天而降摔落在三不管，涂涂声称小灰是他的救命恩人，并将无名饭店赠予她打理。原本人来人往的无名饭店现在空无一人，小灰决定聘请大厨改变现状，此时沐白、将夜同时出现。而在人间的夕小灿找到捉妖师，准备对付小灰。　　安东尼奥（乔恩·塞达 Jon Seda 饰）是汉克手下的一员要将，尽管他曾经和汉克有过一段不太愉快的过去，但他依然将在汉克手下工作当做是一种光荣。其他身在行动组的组员们亦是如此，能够跻身成为情报组中的一员是他们梦寐以求的事情。然而，情报组的工作谈何容易，加入了情报组，就以为这要和芝加哥最邪恶、最凶残的罪犯展开正面交锋。