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Human's classification consciousness and practice on vegetation, animals and other organisms have existed since ancient times. They existed in ancient China and ancient Greece, and developed into a science-taxonomy. However, the early classification was mainly based on morphology, such as the shape of roots, stems and leaves. Taxonomy based on morphology is the oldest discipline in biology, and the earliest phyla, classes, orders, families, genera and species basically came from here. Taxonomy in the general sense refers to a specialized discipline that identifies, identifies, describes, names and classifies organisms. The task and purpose of taxonomy can be divided into two parts:某剧场这晚迎来现代爱情悲剧《暗恋》和古装爱情喜剧《桃花源》两个不相干的剧组，因为都与之签定了当晚的彩排合约、又都是演出在即，双方发生争执只为独占唯一的舞台，结果谁都不愿相让只能间隔着排戏。 现代悲剧里，江滨柳和云之凡在上海战乱时生出爱情，无奈一别竟是杳无音信大半生，江滨柳几十年来不间断的寻找云之凡从来无果，耄耋之年身患重病的他拿看似美满的家庭事业比对永藏在心间的对云之凡的单纯爱恋，只觉空落。古装喜剧中，武陵渔夫老陶被妻子春花戴绿帽，每日受尽她及其情人袁老板的欺辱，某日借口外出打鱼实为想自杀之时，误入桃花仙境，而春花与袁老板结为夫妻后，过的却是比原来更不堪的日子。《时间也能配送吗 2002》以满街红色浪潮、人与人之间充满温情的2002年为背景，讲述了新冠肺炎疫情猖獗后，为正在经受艰难时期的现在的青春和怀念那个时代的青春们传达的温暖的慰藉故事。When I heard this, I coughed gently and motioned for his words to be a bit off the topic. Wang Zeduan was embarrassed at first. Looking at his expression, he did feel that what he said had nothing to do with the topic, but then he smiled and didn't care, but went on to say:Considering performance, the whole program only needs to create an instance once, so performance will not have any impact.第073章燕南天郑武翻开书页，急不可耐地看下去。The above design, as commented above, when executing the Resize method of SmartTest, if a rectangular object is passed in, when the height is greater than the width, the width will be automatically increased until it exceeds the height. However, if a square object is passed in, it will fall into a dead loop. The fundamental reason at this time is that rectangles cannot be the parent class of squares. Since there is a problem, they can be reconstructed so that both of them inherit from quadrilateral classes. The refactoring code looks like this: