大香蕉伊人久草色尼姑

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.Pin Arrangement DirectionDuring a DNS NXDOMIAN flood attack, the DNS server makes multiple domain name queries and its cache is filled with a large number of NXDOMAIN records, resulting in a slow response to DNS resolution requests from normal users我国首部解读中国制造文化密码，弘扬航空报国精神的电视剧。该剧以严谨的现实主义创作精神书写了新中国航空工业70年悲壮伟大的奋斗历程，题材宏大、行业尖端，具有很强的标志性和引领性。该剧以三大战役为背景，塑造了以柴福东为首的共军特工队和以马伯驹为首的国民党军统之间的殊死较量。《冷枪手》集谍战、枪战、夺宝等精彩元素于一体，突出表现了特工队的成员们的才智，众心如城为完成民族大义。Zhang Xiaobo blinked after saying these words, After a pause and a sigh, Like every veteran interviewed, these are memories they don't want to mention again. His expression told me more that he must have remembered something more that made him feel heavy-hearted. I saw the details of his facial changes after writing the interview information just collected, and asked: