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1、LESSON51New Concept English three Lesson 51SECTION 1: Predicting the future is notoriously difficult. Who could have imagined, in the mid 1970s, for example, that by the end of the 20th century, computers would be as common in people's homes as TV sets? In the 1970s, computers were common enough
2、, but only in big business, government departments, and large organizations. These were the so- called mainframe machines. Mainframe computers were very large indeed, often occupying whole air-conditioned rooms, employing full- time technicians and run on specially-written software. Though these lar
3、ge machines still exist, many of their functions have been taken over by small powerful personal computers, commonly known as PCs. notorious (a)著名的，臭名昭着的; 声名狼藉的 Be notorious for Predicting the future is notoriously difficult. Who could have imagined, in the mid 1970s, for example, that by the end of
4、 the 20th century, computers would be as common in people's homes as TV sets? In the 1970s, computers were common enough, but only in big business, government departments, and large organizations. These were the so- called mainframe machines. Mainframe computers were very large indeed, often occ
5、upying whole air-conditioned rooms, employing full- time technicians and run on specially-written software. Though these large machines still exist, many of their functions have been taken over by small powerful personal computers, commonly known as PCs.1Section 2: Predicting the future is notorious
6、ly difficult. Who could have imagined, in the mid 1970s, for example, that by the end of the 20th century, computers would be as common in people's homes as TV sets? In the 1970s, computers were common enough, but only in big business, government departments, and large organizations. These were
7、the so-called mainframe machines. Mainframe computers were very large indeed, often occupying whole air- conditioned rooms, employing full-time technicians and run on specially- written software. Though these large machines still exist, many of their functions have been taken over by small powerful
8、personal computers, commonly known as PCs. In 1975, a primitive machine called the Altair, was launched in the USA. It can properly be described as the first 'home computer' and it pointed the way to the future. This was followed, at the end of the 1970s, by a machine called an Apple. In the
9、 early 1980s, the computer giant, IBM produced the world's first Personal Computer. This ran on an 'operating system' called DOS, produced by a then small company named Microsoft. The IBM Personal Computer was widely copied. From those humble beginnings, we have seen the development of t
10、he user-friendly home computers and multimedia machines which are in common use today. Primitive 原始的: 原始文化 primitive culture, Primitive customs Primitive tribes （反） In 1975, a primitive machine called the Altair, was launched in the USA. It can properly be described as the first 'home computer&#
11、39; and it pointed the way to the future. This was followed, at the end of the 1970s, by a machine called an Apple. In the early 1980s, the computer giant, IBM produced the world's first Personal Computer. This ran on an 'operating system' called DOS, produced by a then small company nam
12、ed Microsoft. The IBM Personal Computer was widely copied. From those humble beginnings, we have seen the development of the user-friendly home computers and multimedia machines which are in common use today.2 1)送上轨道: launch a missile, launch a torpedo, launch a satellite 2)使（船）下水: launch a new wars
13、hip The lifeboat was launched immediately to rescue the four men. 3)发起，推出 launch an attack The scheme was launched a year ago. The company is launching a new model next month. In 1975, a primitive machine called the Altair, was launched in the USA. It can properly be described as the first 'home
14、 computer' and it pointed the way to the future. This was followed, at the end of the 1970s, by a machine called an Apple. In the early 1980s, the computer giant, IBM produced the world's first Personal Computer. This ran on an 'operating system' called DOS, produced by a then small
15、company named Microsoft. The IBM Personal Computer was widely copied. From those humble beginnings, we have seen the development of the user-friendly home computers and multimedia machines which are in common use today. Humble (指人）低下的, 卑微的: men of humble birth a humble occupation （指事物）简陋的 简陋的家Sectio
16、n 3: Considering how recent these developments are, it is even more remarkable that as long ago as the 1960s, an Englishman, Leon Bagrit, was able to predict some of the uses of computers which we know today. Bagrit dismissed the idea that computers would learn to 'think' for themselves and
17、would 'rule the world', which people liked to believe in those days. Bagrit foresaw a time when computers would be small enough to hold in the hand, when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals
18、to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitive clerical work. All these computer uses have become commonplace.3 dismiss (v) 解雇 遣散，解散 dismiss soldiers The class will be dismissed early today. The proposal was dismissed. 摒弃(某事）不再考虑（某人）
19、, I dismissed the idea from my mind I dismissed my ex-boyfriend I missed my boyfriend Considering how recent these developments are, it is even more remarkable that as long ago as the 1960s, an Englishman, Leon Bagrit, was able to predict some of the uses of computers which we know today. Bagrit dis
20、missed the idea that computers would learn to 'think' for themselves and would 'rule the world', which people liked to believe in those days. Bagrit foresaw a time when computers would be small enough to hold in the hand, when they would be capable of providing information about traf
21、fic jams and suggesting alternative routes, when they would be used in hospitals to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitive clerical work. All these computer uses have become commonplace. Alternative (a) 另外的，其它更好的 你有没有另外一个建议 Alte
22、rnative energy sources Considering how recent these developments are, it is even more remarkable that as long ago as the 1960s, an Englishman, Leon Bagrit, was able to predict some of the uses of computers which we know today. Bagrit dismissed the idea that computers would learn to 'think' f
23、or themselves and would 'rule the world', which people liked to believe in those days. Bagrit foresaw a time when computers would be small enough to hold in the hand, when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be
24、used in hospitals to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitive clerical work. All these computer uses have become commonplace.4 Diagnose If cancer is diagnosed in its early stages it can be cured His disease was diagnosed as bird-f
25、lue diagnose sb as (having) 我被诊断患有 我的电脑被诊断感染病毒了（virus) Bagrit foresaw a time when computers would be small enough to hold in the hand, when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals to help doctors to dia
26、gnose illnesses, when they would relieve office workers and accountants of dull, repetitive clerical work. All these computer uses have become commonplace. Relieve (vt)缓解，使宽慰，轻松 Drugs helped to relieve the pain. 缓解压力 缓解焦虑 relieved Relieve sb of sth 带走，拿走 A porter relieved her of the three large case
27、s. After the defeat General Meyer was relieved of his post. Bagrit foresaw a time when computers would be small enough to hold in the hand, when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals to help doctors t
28、o diagnose illnesses, when they would relieve office workers and accountants of dull, repetitive clerical work. All these computer uses have become commonplace. commonplace =everywhere=common (a) 平庸无奇的(often derog 常作贬义) ,平常的 Lobsters are commonplace in Australia Thefts are commonplace in this part o
29、f town. Of course, Leon Bagrit could not possibly have foreseen the development of the Internet, the worldwide system that enables us to communicate instantly with anyone in any part of the world by using computers linked to telephone networks. Nor could he have foreseen how we could use the Interne
30、t to obtain information on every known subject, so we can read it on a screen in our homes and even print it as well if we want to. Computers have become smaller and smaller, more and more powerful and cheaper and cheaper. This is what makes Leon Bagrit's predictions particularly remarkable. If
31、he, or someone like him, were alive today, he might be able to tell us what to expect in the next fifty years.5Not only to stay at home,but he was also forbidden to meet his family.A.he was forcingB.he was forced C.was he forcingD.was he forcedNever before met such a serious situation;I am at a loss
32、 what to do.A.did IB.was IC.have ID.shall ILittle about his own health though he was badly ill.A.he caredB.did he careC.does he careD.he caresSeldom to see his parents although he lives so close to them. A.he goesB.he wentC.did he goD.does he go Of course, Leon Bagrit could not possibly have foresee
33、n the development of the Internet, the worldwide system that enables us to communicate instantly with anyone in any part of the world by using computers linked to telephone networks. Nor could he have foreseen how we could use the Internet to obtain information on every known subject, so we can read
34、 it on a screen in our homes and even print it as well if we want to. Computers have become smaller and smaller, more and more powerful and cheaper and cheaper. This is what makes Leon Bagrit's predictions particularly remarkable. If he, or someone like him, were alive today, he might be able to
35、 tell us what to expect in the next fifty years.If she had worked harder, she .A. would succeedB. had succeededC. should succeedD. would have succeededThe riceif you had been more careful.A. would not be burningB. would not burnC. Would not have been burntD. would not burntIf my lawyerhere last Saturday, heme from going.A. had been; would have prevented B. had been; would preventC. were; would preventD. were; would have prevented6