大學(xué)英語(yǔ)四級(jí)試卷(更新版)

　　

【正文】 about , I regard this as the majordiscovery of the past hundred years of is,in its way,an illuminating piece of would have amazed the brightest minds of the 18th century Enlightenment (啟蒙運(yùn)動(dòng) )to be told by any of us how little we know and how confusing seems the way ahead .It is this sudden confrontation(對(duì)抗 )with the depth and scope of ignorance that represents the most significant contribution of 20th century science to the human earlier times,we either pretended to understand how things worked or ignored the problem,or simply made up storied to fill the that we have begun exploring in earnest,we are getting glimpses of how huge the questions are ,and how far from being of this,we are is not so bad being ignorant if you are totally ignorant,the hard thing is knowing in some detail the reality of ignorance,the worst spots and here and there the not so bad spots,but no true light at the end of the tunnel nor even any tunnels that can yet be trusted. But we are making a beginning,and there ought to be some are probably no questions we can think up that can’ t be answered,sooner or later,including even the matter of be sure,there may well be questions we can’ t think up,ever,and therefore,limits to the reach of human intellect,but that is another our limits we should be able to work our way through to all our answers,if we keep at it long enough,and pay attention. to the author,really good science ___. A)would surprise the brightest minds of the 18th century enlightenment B)will produce results which cannot be foreseen C)will help people to make the right choice in advance D)will bring about disturbing results can be inferred from the passage that scientists of the 18th century____. A)thought that they knew a great deal and could solve most problems of science B)were afraid of facing up to the realities of scientific research C)knew that they were ignorant and wanted to know more about nature D)did more harm than good in promoting man’ s understanding of nature of the following is NOT mentioned about scientists in earlier times? A)They invented false theories to explain things they didn’ t understand. B)They falsely claimed to know all about nature. C)They did not believe in results from scientific observation. D)They paid little attention to the problems they didn’ t understand. is the author’ s attitude towards science? A)He is depressed because of the ignorance of scientists. B)He is doubtful because of the enormous difficulties in scientific research. C)He is confident though he is aware of the enormous difficulties in scientific research. D)He is delighted because of the illuminating scientific findings. author believes that ___. A)man can find solutions sooner or later to whatever questions concerning nature he can think up B)man can not solve all the problems he can think up because of the limits of human intellect C)sooner or later man can think up all the questions concerning nature and answer them D)questions concerning consciousness are outside the scope of scientific research Passage 2 Questions 26 to 30 are based on the following passage. Sugar is so much a part of our modern life that we only really think about it when,for some reason,we cannot obtain has been known to man for at least 3,000 years,but has e into mon use only in modern quite recently it was considered as a medicine and as a luxury for the very rich only. Sugar is,then,very important to our what exactly is it?Of course,most of us recognize sugar immediately as the sweet material which we put in coffee or mon form of sugar is derived from two plants:the sugar cane(a type of grass which grows to a height of twenty feet)and the sugar beet(which grows underground..But there are in fact many types of sugar,and the chemist recognizes hundreds of different varieties,each ing from a different source. About 90% of the sugar produced as 10% is used in industry for purposes other than food sugar has great possibilities for use as the basis of can even be used for making the future these potential uses will certainly be developed more than in the past. There are many reasons why we should increase the production of important is that it is one of the most highly concentrated of energy sugar cane and beet produce an average of 7,000,000 calories per this way they have the advantage over potatoes which give only 4,000,000, while figure for wheat and beans is 2,000,000 three acres of land growing wheat and potatoes give only slightly more energy than one acre of sugar. heading of Paragraph one may be ___. A)What sugar is B)Sugar Through the Ages C)The Advantages of Sugar D)Present and Future Uses of Sugar third paragraph emphasizes____. A)about 90% of sugar used as food B)only 10% used in industry C)sugar used for making plastics D)future uses of sugar has been used widely ___ A)for 3,000 years B)in modern times C)quite recently D)for 300 years many mon forms of sugar are exemplified in this passage? A)One. B)Two . C)One hundred. D)Several hundreds. main reason why we should increase the production of sugar is ____. A)it tastes sweet B)we can save plenty of land C)we can get more energy D)it is one of the most highly concentrated of energy food Passage 3 Questions 31 to 35 are based on the following passage. The nervous looking young man hesitated for a few moments outside the jeweler’ s before summoning up the courage to was cordially greeted by a young assistant who offered to help felt a rush of blood to his face as he explained he would be bringing in his fiancee to choose an engagement ring later that assistant listened attentively and assured him that the