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　　弟弟少义嗜赌成性，将房契地契输给陈剑锋的父亲陈子秋的手下，袍哥头目马三。少诚答应还钱，想用凌副Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:不过也无所谓，杨长帆的礼到位了，千户的礼到不到位跟他没关系。此时。/scratchThree, the use of star endorsements to pay attention to its periodicity, identityIn 2009, Xueershi preschool education began to offer mathematics thinking courses, and in 2011, Mobi Mathematics offered thinking ability training courses to children aged 2-15. In 2017, New Oriental will offer children's mathematics thinking classes to students who are about to enter large classes in kindergartens. This year, New Oriental Bubble Children will also launch mathematics thinking enlightenment picture books for first-year students, which have been used in some school districts this summer. Zhihui School, an elite education school, began to train children's thinking ability for children aged 4-12 in 2014. One-on-one leader also recently launched the discipline thinking quality education brand "Leader Children" for children aged 4-12.