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Questions 53-56 When did sport begin If sport is, in essence, play, the claim might be made that sprot is much older than humankind for, as we all have observed, the beasts play. Dogs and cats wrestle and play ball games. Fished and birds dance. The apes have simple, pleasurable games. Frolicking infants, school children playing tag, and adult arm wrestlers are demonstrating strong, trans-generational and trans-species bonds with the universe of animals past present and future. Young animals, particularly, tumble, chase, run wrestle, mock, imitate, and laugh( or so it seems) to the point of delighted exhaust. Their play, and ours, appears to serve no other purpose than to give pleasure to the players, and apparently to remove us temporarily form the anguish of life in earnest. Some philosophers have claimed that our playfulness is the most noble part of our basic nature. In their generous conception, play harmlessly and experimentally permits us to put our creative forces, fantasy, and imagination into action. Play is release form the tedious battles against scarcity and decline which are the incessant, and inevitable, tragedies of life. This is a grand conception that excites and provokes. The holders of this view claim that origins of our highest accomplishments-liturgy, literature and law-can be traced to play a impulse which, paradoxically, we see most purely enjoyed by young beasts and children. Our sports, in this rather happy, non-fatalistic view of human nature, are more splendid creations of the non-datable, trans-species play impulse. It seems to the author that young animals play in order to ________
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Question 45-48 The horse preceded man on earth. Although the earliest remains of primitive horses have been found on the North American continent, many scientist believe this small species traveled over a land mass in the Bering Sea to found the beginnings of the modern horse in Asia. It became extinct in America. Other scientists believe that the horse may have originated in Asia. In any event the animal soon spread into China, Europe, and the Middle East. The first modern horses to be introduced into the American continent came with the early Spanish explorers. Horses were bred into many types. The heavy horses developed in the low countries of Europe and were used for Arabian. The only true wild horses left in the 20th century are found in Mongolia. Horses are said to rate in intelligence after the ape, elephant, and dog. They have excellent memories and can sometimes find their way home when lost, and sense danger better that their masters. The early civilizations of man that had made use of ht horse developed more rapidly than those which did not. What can be said about the varieties of horses
Why is(71)fun What delights may its practitioner espect his reward First is the sheer joy of making things.As the child delights in his mud pie,so the adult enjoys building things,especially things of his own design.Secong is the pleasure of making things that are useful to other people.Third is the fascinanon of fashioning complex puzzle-like objects of interlocking moving parts and watching them work in subtle eyeles,playing out the consequences of principies built in from the beginning.Fourth is the joy of always learning,which springs from the(72)nature of the task.In one way or another the problem is ever new,and its solver learns something:sometimes(73),sometimes theoretical,and sometimes both.Finally,there is the delight of working in such a tractable medium.The(74),like the poet,works only slightly removed from nure thought-stuff.Few media of ereation are so flexible,so easy to polish and rework,so readily capable of realizing grand conceptual structures. Yet the program(75),unlike the poet’s words,is real in the sense that it moves and works,producing visible outputs separate from the comstrct itself.It prints results,draws pictures,produces sounds,moves arms.Progamming then is fun because it gratifies creative longings built deep within us and delights sensibities we have in common with all men. （75）处填（）。
已知一个二叉树的先序遍历序列为① 、② 、③ 、④ 、⑤ 中序遍历序列为② 、① 、④ 、③ 、⑤ ，则该二叉树的后序遍历序列为（57），对于任意一棵二叉树，叙述错误的是（58）。 （57）处填（）。
某家庭准备以抵押贷款方式购买一套住房。该家庭月总收入7000元，最多能以月总收入的25%支付住房贷款的月还款额。年贷款利率为6%，最长贷款期限20年。最低首付款为房价的30%，若采用按月等额偿还方式，问：（1）该家庭能购买此房的最高总价是多少（2）若第5年末银行贷款利率上调为9%，为保持原月偿还额不变，则该家庭需在第6年初一次性提前偿还贷款多少元（3）如果不提前偿还贷款，则需将贷款期限延长多少年？
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