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No.51 Jin Minzhi看着周云涛的文章，众人也都是感慨万千。Originated in Europe. It was listed as the first Olympic Games in 1896.The fundamental reason for using design patterns is to adapt to changes, improve code reuse rate, and make software more maintainable and scalable. In addition, the following principles should be followed when designing: single responsibility principle, open and closed principle, Richter substitution principle, dependency inversion principle, interface isolation principle, composite reuse principle and Dimit principle. Each design principle is described below.1. "Mast Light" is a white light designated to be placed above the centerline of the head and tail of the ship. It displays uninterrupted light in a horizontal arc of 225 degrees. Its device is to display the light from the front of the ship to 22.5 degrees behind each side.Other requirements for kindergarten teacher qualification certificate: