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7. An imperceptible, partially submerged tugboat or object or a combination of such ships or objects shall show:Some Calculations of Akhan Scourge Flow情况紧急，不告而别，还请上将军和范亚父见谅In the near future, glacial melting has covered 98% of earth's landmass. Sharks have flourished and now dominate the planet, operating as one massive school led by a mutated alpha shark.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:10,000 Yuan Rao Wenyi and Li Jingze ["Depth" China Mobile Phone India Confrontation: How Did Xiaomi Achieve No.1 in Three Years? [Editor: Liu Fangyuan等等。