题目内容
浮点数的一般表示形式是N=2E×F，其中E是阶码，F是尾数。以下关于浮点表示的叙述中错误的是（3），两个浮点数进行相加运算，应首先（4）。 （3）处填（）。
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从物流业务分析中，可以看出在物流业务中的包装业属于低投资、低成本、高收入的行业。
设有员工实体 Emp(员工号，姓名，姓别，年龄，出生年月，联系方式，部门号)，其中“联系方式”要求记录该员工的手机号码和办公室电话，部门号要求对照别一部门实体 Dept的主码“部门号”。Emp实体中存在派生属性和多值属性：（54）：对属性部门号应该进行（ 55）约束；可以通过命令（56）修改表中的数据。 （56）处填（）。
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 ________
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
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