1、公共英语五级-171 及答案解析(总分：110.00，做题时间：90 分钟)一、Section Listening (总题数：0，分数：0.00)二、Part A(总题数：1，分数：10.00)(1).The recent social and economic changes in the US have great impact on all the American housing system.（分数：1.00）A.正确B.错误(2).One out of four married couples have got divorced in America.（分数：1.00）A.正确B.
2、错误(3).The change in family size has affected the size of houses needed.（分数：1.00）A.正确B.错误(4).In many areas of the US, people would rather rent an apartment than buy a house.（分数：1.00）A.正确B.错误(5).People form cooperatives to spend less money on houses.（分数：1.00）A.正确B.错误(6).People move back to cities beca
3、use they want to be closer to their offices.（分数：1.00）A.正确B.错误(7).laving underground can help reduce the cost of heating and lighting.（分数：1.00）A.正确B.错误(8).Inflation has made the interest on housing loans 18% higher than before.（分数：1.00）A.正确B.错误(9).Unemployment in housing industry and depression in ho
4、using market result from social and economic changes.（分数：1.00）A.正确B.错误(10).Mobile houses are built in order to lower the cost.（分数：1.00）A.正确B.错误三、Part B(总题数：3，分数：10.00)Questions 11 13 are based on the following talk. You now have 15 seconds to read Questions 11 13.（分数：3.00）(1).Which of the following
5、about pickpocketing is not true?A. It is a fast increasing crime.B. Its methods are improving.C. Nobody is safe from a veteran pickpocket.D. There are about 4000000 victims every year.（分数：1.00）A.B.C.D.(2).What was probably the reason for discontinuing to hang a pickpocket in the 18th century?A. Hang
6、ing was a useless warning.B. It was too cruel and violent.C. Too many people watched the practice.D. Other pickpockets were only spectators.（分数：1.00）A.B.C.D.(3).Where is the least likely place for pickpocketing?A. Banks and supermarkets.B. Train and bus stations.C. Post offices and hospitals.D. Elev
7、ators and airports.（分数：1.00）A.B.C.D.Questions 14 16 are based on the following conversation. You now have 15 seconds to read Questions 14 16.（分数：3.00）(1).What are the speakers doing?A. Visiting the new restaurant.B. Watching a parade.C. Having a picnic.D. Going to the beach.（分数：1.00）A.B.C.D.(2).How
8、does the man feel about the rain?A. Excited. B. Confused.C. Afraid. D. Surprised.（分数：1.00）A.B.C.D.(3).What will the speakers probably do next?A. Go home.B. Go to a restaurant.C. Unpack the car.D. Put a dry blanket under the tree.（分数：1.00）A.B.C.D.Questions 17 20 are based on the following talk. You n
9、ow have 20 seconds to read Questions 17 20.（分数：4.00）(1).What is the main topic of this talk?A. Bicycles and cars.B. Building codes.C. Energy conservation.D. New housing construction.（分数：1.00）A.B.C.D.(2).Why is insulation required in new houses?A. To limit discussion on heating bills.B. To prevent he
10、at loss.C. To determine the temperature in homes.D. To convert homes to electric heat.（分数：1.00）A.B.C.D.(3).What is the purpose of building new houses facing north or south?A. To avoid direct sunlight.B. To limit space used.C. To keep out the cold.D. To conform to other houses.（分数：1.00）A.B.C.D.(4).Wh
11、at has the city of Davis provided for bicycle riders?A. Special paths.B. Resurfaced highways.C. More parking space.D. Better street lighting.（分数：1.00）A.B.C.D.四、Part C(总题数：1，分数：10.00)(1).What do you know about Beethovens music talent when he was 7?（分数：1.00）填空项 1:_(2).How old was he when he was made a
12、ssistant organist in Bonn?（分数：1.00）填空项 1:_(3).In which year did Beethoven meet his idol Mozart?（分数：1.00）填空项 1:_(4).What was Mozarts reaction after he heard Beethovens performance?（分数：1.00）填空项 1:_(5).What did Beethoven think of Haydns teaching?（分数：1.00）填空项 1:_(6).What was Beethovens personality?（分数：1
13、.00）填空项 1:_(7).What can we learn about Beethoven from his style of composing?（分数：1.00）填空项 1:_(8).Which is the most popular of all his symphonies?（分数：1.00）填空项 1:_(9).How did Beethoven communicate with others after he had lost his hearing?（分数：1.00）填空项 1:_(10).Till 2004 how long has he been dead?（分数：1.
14、00）填空项 1:_五、Section Use of Eng(总题数：1，分数：20.00)You may say that the business of marking books is going to slow down your reading. (31) probably will. Thats one of the (32) for doing it. Most of us have been taken in by the notion that speed of (33) is a measure of our intelligence. There is (34) such
15、 things as the right (35) for intelligent reading. Some things should be (36) quickly and effortlessly, and some should be read (37) and even laboriously. The sign of intelligence (38) reading is the ability to read (39) things differently according to their worth. In the (40) of good books, the poi
16、nt is not to see how many of them can you get through, (41) how many can you get through themhow many you can (42) your own. A few friends are (43) than a thousand acquaintances. If this be your goal, (44) it should be, you will not be impatient if it takes more time and effort to read a great book
17、than a newspaper (45) .You may have another objection to (46) books. You cant lend them to your friends (47) nobody else can read them (48) being distracted by your notes. Whats more, you wont want to lend them because a (49) copy is a kind of intellectual diary, and (50) it is almost like giving yo
18、ur mind away.If your friend hopes to read your Shakespeare, or The Federalist Papers, tell him, gently but firmly, to buy a copy. You will lend him your car or your coatbut your books are as much a part of you as your head or your heart.（分数：20.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项
19、1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_六、Section Reading Co(总题数：0，分数：0.00)七、Part A(总题数：0，分数：0.00)八、Text 1(总题数：1，分数：5.00)Gene therapy and gene based drugs are two ways we could benefit from our growing mastery of genetic science. But there will be other
20、s as well. Here is one of the remarkable therapies on the cutting edge of genetic research that could make their way into mainstream medicine in the coming years.While its true that just about every cell in the body has the instructions to make a complete human, most of those instructions are inacti
21、vated, and with good reason: the last thing you want for your brain cells is to start churning out stomach acid or your nose to turn into a kidney. The only time cells truly have the potential to turn into any and all body parts is very early in a pregnancy, when so-called stem cells havent begun to
22、 specialize.Yet this untapped potential could be a terrific boon to medicine. Most diseases involve the death of healthy cellsbrain cells in Alzheimers, cardiac cells in heart disease, pancreatic cells in diabetes, to name a few; if doctors could isolate stem cells, then direct their growth, they mi
23、ght be able to furnish patients with healthy replacement tissue.It was incredibly difficult, but last fall scientists at the University of Wisconsin managed to isolate stem cells and get them to grow into neural, gut, muscle and bone cells. The process still cant be controlled, and may have unforese
24、en limitations; but if efforts to understand and master stem cell development prove successful, doctors will have a therapeutic tool of incredible power.The same applies to cloning, which is really just the other side of the coin. True cloning, as first shown with the sheep Dolly two years ago, invo
25、lves taking a developed cell and reactivating the genome within, resetting its developmental instructions to a pristine state. Once that happens, the rejuvenated cell can develop into a full-fledged animal, genetically identical to its parent.For agriculture, in which purely physical characteristics
26、 like milk production in a cow or low fat in a hog have real market value, biological carbon copies could become routine within a few years. This past year scientists have done for mice and cows what lan Wilmut did for Dolly, and other creatures are bound to join the cloned menagerie in the coming y
27、ear.Human cloning, on the other hand, may be technically feasible but legally and emotionally more difficult. Still, one day it will happen. The ability to reset body cells to a pristine, undeveloped state could give doctors exactly the same advantages they would get from stem cells: the potential t
28、o make healthy body tissues of all sorts, and thus to cure disease. That could prove to be a true “miracle cure“.（分数：5.00）(1).The writer holds that the potential to make healthy body tissues will _.A. aggravate moral issues of human cloningB. bring great benefits to human beingsC. help scientists de
29、code body instructionsD. involve employing surgical instruments（分数：1.00）A.B.C.D.(2).The word “rejuvenated“ (Para. 5) most probably means _.A. modified B. re-collectedC. classified D. reactivated（分数：1.00）A.B.C.D.(3).The research at the University of Wisconsin is mentioned to show _.A. the isolation o
30、f stem cellsB. the effects of gene therapiesC. the advantages of human cloningD. the limitations of tissue replacements（分数：1.00）A.B.C.D.(4).Which of the following is true according to the text?A. The principle of gene therapy is applicable to that of cloning.B. The isolation of stem cells is too dif
31、ficult to be feasible.C. It is reasonable for all body instructions to be activated.D. Cloned animals will eventually take control of the world.（分数：1.00）A.B.C.D.(5).Towards the genetic research, the authors attitude can best be said to be that of _.A. frustration B. indifferenceC. amazement D. oppos
32、ition（分数：1.00）A.B.C.D.九、Text 2(总题数：1，分数：5.00)Earthquake survivors trapped in rubble could one day be saved by an unlikely rescuer: A robotic caterpillar that burrows its way through debris. Just a few centimeters wide, the robot relies on magnetic fields to propel it through the kind of tiny crevice
33、s that would foil the wheeled or tracked search robots currently used to locate people trapped in collapsed buildingsThe caterpillars inventor, Norihiko Saga of Akita Prefectural University in Japan, will demonstrate his new method of locomotion at a conference on magnetic materials in Seattle. In a
34、ddition to lights and cameras, a search caterpillar could be equipped with an array of sensors to measure other factorssuch as radioactivity or oxygen levelsthat could tell human rescuers if an area is safe to enter.The magnetic caterpillar is amazingly simple. It moves by a process similar to peris
35、talsis, the rhythmic contraction that moves food down your intestine. Saga made the caterpillar from a series of rubber capsules filled with a magnetic fluid consisting of iron particles, water, and a detergent-like surfactant, which reduces the surface tension of the fluid. Each capsule is linked t
36、o the next by a pair of rubber rods. The caterpillars guts are wrapped in a clear, flexible polymer tube that protects it from the environment.To make the caterpillar move forwards, Saga moves a magnetic field backwards along the caterpillar. Inside the caterpillars “head“ capsule, magnetic fluid su
37、rges towards the attractive magnetic field, causing the capsule to bulge out to the sides and draw its front and rear portions up. As the magnetic field passes to the next capsule, the first breaks free and springs forward and the next capsule bunches up. In this way, the caterpillar can reach speed
38、s of 4 centimeters per second as it crawls along.Moving the magnetic field faster can make it traverse the caterpillar before all the capsules have sprung back to their original shapes. The segments then all spring back, almost but not quite simultaneously.Saga plans to automate the movement of the
39、caterpillar by placing electromagnets at regular intervals along the inside of its polymer tube. By phasing the current flow to the electromagnets, he 11 be able to control it wirelessly via remote control. He also needs to find a new type of rubber for the magnetic capsules, because the one hes usi
40、ng at the minute eventually begins to leak.But crawling is not the most efficient form of locomotion for robots, says Robert Full of the University of California at Berkeley, an expert in animal motion who occasionally advises robotics designers. “If you look at the energetic cost of crawling, compa
41、red to walking, swimming or flying, crawling is very expensive,“ he says. Walking, on the other every step, energy is conserved in the foot and then released to help the foot spring up.Saga acknowledges this inefficiency but says his caterpillar is far more stable than one that walks, rolls on wheel
42、s or flies. It has no moving parts save for a few fluid-filled rubber capsules. Biped robots and wheeled robots require a smooth surface and are difficult to miniaturize, and flying robots have too many moving parts. “My peristaltic crawling robot is simple and it works, “ he says.（分数：5.00）(1).From
43、this passage, we can learn that _.A. a robotic caterpillar can crawl by a pair of rubber rodsB. when a caterpillar moves, the magnetic field moves backwards along itC. the environment couldnt influence a robotic caterpillars guts, which are wrapped in a capsuleD. crawling is very stable and efficien
44、t, and when it moves, only a few elements are needed（分数：1.00）A.B.C.D.(2).According to this passage, which is not true about the construction of the robotic caterpillar?A. A robotic caterpillar is made from a series of rubber capsules filled with a magnetic fluid.B. Iron particles, water and a deterg
45、ent-like surfactant form a magnetic fluid.C. Each capsule filled with a magnetic fluid is linked to the next by a pair of rubber rods.D. In order to keep stable condition, the caterpillars guts are wrapped in a clear, flexible polymer tube.（分数：1.00）A.B.C.D.(3).The meaning of the word “peristalsis“ i
46、n Paragraph 3 is similar to _.A. swimming B. flyingC. crawling D. walking（分数：1.00）A.B.C.D.(4).Comparing the robotic caterpillar and the other robots, which of the following is not true?A. A smooth surface is indispensable to biped robots and wheeled robots.B. Flying robots are very inconvenient when
47、 moving, because they have too many moving parts.C. The robotic caterpillar only has rubber capsules filled with a magnetic fluid.D. Its incapable for wheeled robots to locate trapped people because they are impossible to miniaturize.（分数：1.00）A.B.C.D.(5).The passage is mainly about _.A. why a roboti
48、c caterpillar can find trapped peopleB. how a robotic caterpillar worksC. the instruction of the magnetic caterpillarD. how a robotic caterpillar crawls（分数：1.00）A.B.C.D.十、Text 3(总题数：1，分数：5.00)Could the bad old days of economic decline be about to return? Since OPEC agreed to supply-cuts in March, the price of crud
