[外语类试卷]大学英语六级模拟试卷610（无答案）.doc

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1、大学英语六级模拟试卷 610（无答案）一、Part I Writing (30 minutes)1 Directions: For this part, you are supposed to write a short essay entitled Internet according to the following outline given below in Chinese. The first sentence of each paragraph has been given to you.1. 因特网越来越普遍地进入到我们的学习、工作和生活当中2因特网的益处3. 因特网的消极方面I

2、nternetInternet has been playing an increasing role in our daily life._.Internet has enabled us to do a lot of things more easily and quickly._.However, if not managed properly, Internet can create many problems too._.All in all, we cannot live without Internet now._. 二、Part II Reading Comprehension

3、 (Skimming and Scanning) (15 minutes)Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-4, mark：Y (for YES) if the statement agrees with the information given in the passage;N (for NO) if the statement c

4、ontradicts the information given in the passage;NG (for NOT GIVEN) if the information is not given in the passage.1 Creatures of the Thermal (热量的 ) VentsThe three-person submersible Alvin sank through the cold, dark waters of the Pacific Ocean for more than an hour, finally touching down on the sea

5、floor more than 8,000 feet below the surface. It was December 1993, and the scientists inside the sub had come to thisstretch of the East Pacific Rise, an underwater mountain range about 500 miles southwest of Acapulco, Mexico, to inspect a recently formed hydrothermal vent-a fissure(裂缝) in the ocea

6、n bottom that leaks boiling, acidic water.Peering out through the subs tiny windows, the visitors were astonished to see thickets of giant tube worms, some four feet tall. The tail ends of the worms were firmly planted on the ocean floor, while red plumes on the other ends swayed like a field of pop

7、pies. Alvin had brought researches to the same spot less than two years earlier, when they had seen none of these strange creatures. Previous measurements showed that individual tube worms could increase in length at a rate of 33 inches per year, making them the fastest-growing marine invertebrates.

8、 That means tube worms can grow more rapidly than scientists once thought.The giant tube worm is one of the most eye-catching members of a diverse community that forms around hydrothermal vents. Scientists once thought that no living thing could survive the harsh combination of toxic chemicals, high

9、 temperatures, high pressures, and total darkness at these vents. But in 1977, researchers diving in Alvin discovered tube worms and other strange organisms thriving at a Vent off the Galapagos Islands. Similar communities have since been found at several hundred hot sots around the world. These cre

10、atures are like nothing else on Earth.Vents form where the planets crustal plates are slowly spreading apart and magma is welling up from below to form mountain ranges known as mid-ocean ridges. As cracks form at these spreading centers, seawater seeps a mile or two down into the hot rock. Enriched

11、with minerals leached from the rock, the water heats and rises to the ocean floor to form a vent. Vents are usually clustered in fields, underwater versions of Yellowstones geyser basins. Individual vent openings typically range from less than a half inch to more than six feet in diameter. Such fiel

12、ds are normally found at a depth of more than a mile. Most have been discovered along the crest of the Mid-Oceanic Ridge, a 46,000-mile-long chain of mountains that wraps around Earth like the seams on a baseball. A few vents have also been found at seamounts, underwater volcanoes that are not locat

13、ed at the intersection of crustal plates.Hydrothermal vents are underwater oases (避风港), providing habitat for many creatures that are not found anywhere else in the ocean. Water pouring out of vents can reach temperatures up to about 400; the high pressure keeps the water from boiling. However, the

14、intense heat is limited to a small area. Within less than an inch of the vent opening, the water temperature drops to 2, the ambient temperature of deep seawater. Most of the creatures that assemble around vents live at temperatures just above freezing. Thus, chemicals are the key to vent life, not

15、heat. The most prevalent chemical dissolved in vent water is hydrogen sulfide (硫化氢), which smells like rotten eggs. This chemical is produced when seawater reacts with sulfate (硫酸盐) in the rocks below the ocean floor. Vent bacteria use hydrogen sulfide as their energy source instead of sunlight. The

16、 bacteria in turn sustain large organisms in the vent community.The clams, mussels, tube worms, and other creatures at the vent have a symbiotic relationship (共生关系) with bacteria. The giant tube worms, for example, have no digestive system-no mouth or gut. The worm depends virtually solely on the ba

17、cteria for its nutrition and both partners benefit. The brown, spongy tissue filling the inside of a tube worm is packed with bacteria about 285 billion bacteria per ounce of tissue. The plumes at the top of the worms body are red because they are filled with blood, which contains hemoglobin that bi

18、nds hydrogen sulfide and transports it to the bacteria housed inside the worm. In return, the bacteria oxidize the hydrogen sulfide and convert carbon dioxide into carbon compounds that nourish the worm.Tube worms reproduce by spawning (产卵). They release sperm (精子) and eggs, which combine in the wat

19、er to create a new worm. Biologists dont know how the infant worm acquires its own bacteria. Perhaps the egg comes with a starter set. Scientists also dont know how tube worms and other organisms locate new vents for colonization. The vents are small, and they are separated like islands. Most vent o

20、rganisms have a free-swimming larval stage (幼虫期). But scientists arent sure whether the larvae float aimlessly or purposely follow clues such as chemical traces in the water-to find new homes.Studying the life cycle of vent organisms is difficult. Researchers have visited only a fraction of the ocea

21、ns hot spots. They have been able to observe vent life only by shining bright lights on creatures accustomed to in inky darkness, and many samples die quickly when removed from their unique environment. Underwater cameras are helping scientists make less interfering observations, but diving expediti

22、ons are still the most useful way to gather information. The 1993 Alvin expedition to the East Pacific Rise was one in a series of dives to the area.The site was first visited in 1989, and scientists observed vent organisms thriving there. But when Alvin returned two years later, its flabbergasted o

23、ccupants witnessed the birth of a hydrothermal vent. A recent volcanic eruption spread glassy lava across the ocean floor, and the researchers measured temperatures up to 403 the hottest ever recorded at a hydrothermal vent. The scientists dubbed the site Tube Worm Barbecue, because the worms they b

24、rought back to their ship had burned flesh.“The most spectacular sight down there was this massive blinding snowstorm of bacteria,“ says Rich Lutz, a marine ecologist at Rutgers University, who led the expedition. On the ocean floor, the bacteria formed mats several inches thick, but he scientists s

25、aw no other living things. Since the eruption, scientists have been able to watch several stages of colonization at the site. When they returned in March 1992, only a few bacterial mats remained. In their place were colonies of Jericho worms and a variety of small crustaceans. In December 1993, the

26、scientists first observed the giant tube worms there. The scientists named the area Phoenix, because new life had arisen from the ashes of the eruption.2 No living thing could survive at a vent except tube worms. （A）Y（B） N（C） NG3 Usually tube worms live in high-temperature environment. （A）Y（B） N（C）

27、NG4 The bacteria depend on worms for hydrogen sulfide in the symbiotic relationship. （A）Y（B） N（C） NG5 Vent life dies quickly when exposed to light. （A）Y（B） N（C） NG6 Hydrothermal vents are formed by _. 7 Scientists in Alvin were surprised in 1993 because they thought that those giant tube worms would

28、 be less than _ inches at that time. 8 Thanks to_, water beyond 100 could not boil. 9 It is _ that attract vent life. 10 According to the passage, tube worms live on _. 11 In year _, there were many dead tube worms found in the East Pacific Rise according to the information from the expeditions. Sec

29、tion ADirections: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. Duri

30、ng the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.（A）Fred forgot to call him last night about the camping trip.（B） He is not going to lend his sleeping bag to Fred.（C） He has not seen Fred at the gym for some time.（D）Fred may have borrowed a sleep

31、ing bag from someone else.（A）Summer has become hotter in recent years.（B） It will cool down a bit over the weekend.（C） Swimming in a pool has a relaxing effect.（D）He hopes the weather forecast is accurate.（A）Taking a picture of Prof. Brown.（B） Commenting on an oil-painting.（C） Hosting a TV program.（

32、D）Staging a performance.（A）She can help the man take care of the plants.（B） Most plants grow better in direct sunlight.（C） The plants need to be watered frequently.（D）The plants should be placed in a shady spot.（A）Change to a more exciting channel.（B） See the movie some other time.（C） Go to bed earl

33、y.（D）Stay up till eleven.（A）Both of them are laymen of modern art.（B） She has learned to appreciate modern sculptures.（C） Italian artists works are difficult to understand.（D）Modern artists are generally considered weird.（A）They seem satisfied with what they have done.（B） They have called all club m

34、embers to contribute.（C） They think the day can be called a memorable one.（D）They find it hard to raise money for the hospital.（A）The man shouldnt hesitate to take the course.（B） The man should talk with the professor first.（C） The course isnt open to undergraduates.（D）The course will require a lot

35、of reading.（A）To put an ad in the newspaper.（B） To renovate the apartment.（C） To rent the apartment.（D）To sell the apartment.（A）Its too small.（B） It has plenty of light.（C） Its rather expensive.（D）It doesnt have many closets.（A）Shes unimpressed by what the man told her.（B） She doubts she can afford

36、it.（C） She doesnt think its suitable for her.（D）Shes very interested in it.（A）To go to see and talk to a friend.（B） To go to cash his travelers checks.（C） To go to the bank and repair the computer.（D）To go to the bank and save some money,（A）He is from Germany.（B） He is from Europe.（C） He is from Bri

37、tain.（D）He is from America.（A）Traveling around the world.（B） Having a rest after a days work.（C） Going on business trip.（D）Working in their company.（A）About the places where to buy beautiful clothes.（B） About the places where to have great food.（C） About the places where to buy bus system.（D）About t

38、he places where to find expensive restaurants.Section BDirections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from t

39、he four choices marked A, B, C and D.（A）Nineteenth-century sea captains.（B） The development of the steamship.（C） The economic importance of sailing ships.（D）Employment in the fishing and whaling industries.（A）They were protected by a strong United States Navy.（B） They were supported by a well-develo

40、ped railroad.（C） Most crew members had experience on foreign ships.（D）As part owners of the ships, captains got some of the profits.（A）They carried passengers, but not cargo.（B） They were large, but surprisingly fast.（C） They were the first successful steam-powered ships.（D）They were more reliable t

41、han other ships of the 1860s.（A）The US should catch up to European environmental standards.（B） American exporters must adapt to new regulations in Europe.（C） The US should be more sensitive to environmental issues.（D）The EU s new regulations are a burden.（A）Their packaging of exports have to conform

42、 to EU regulations.（B） They have to cut out waste completely.（C） They must have an experienced distributor.（D）They will see expensive rise.（A）It will allow fewer trees to be cut.（B） It will require less labor costs.（C） It saves some shipping costs.（D）It will make them more competition.（A）They are lo

43、oked after by animal-care organizations.（B） They sacrifice their lives for the benefit of humans.（C） They look spotlessly clean throughout their lives.（D）They are labeled pet animals by the researchers.（A）They may breed out of control.（B） They may cause damage to the environment.（C） They may behave

44、abnormally.（D）They may affect the results of experiments.（A）When they are no longer useful.（B） When they become ill.（C） When they become escapees.（D）When they get too old.（A）While calling for animal rights, they allowed their kids to keep pet animals.（B） While holding a burial ceremony for a pet mou

45、se, they were killing pest mice.（C） While launching animal protection campaigns, they were trapping kitchen mice.（D）While advocating freedom for animals, they kept their pet mouse in a cage. Passage TwoSection CDirections: In this section, you will hear a passage three times. When the passage is rea

46、d for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing info

47、rmation. For these blanks, you can either use the exact words you have just heard or write down the 36 Dont worry, be happy and, according to a new research, you will also be healthy.It is estimated that over the course of one year, Americans suffer 1 billion colds. But new research shows that all i

48、t may take to【B1】_ this common affliction is a positive and upbeat attitude.People who are happy, relaxed and【B2】_are less likely to catch a cold than those who are depressed, nervous or angry, according to a new study【B3】_in the journal Psychosomatic Medicine.Healthy volunteers were first asked to

49、rate their【B4 】_to experience positive and negative emotions how often they felt pleased, relaxed, happy, or anxious, depressed and hostile. The【B5】_were next given a squirt up the nose of a rhinovirus (鼻病毒 ), the nasty little germ that cause colds. Researchers then watched the volunteers to see who came down with a cold and how the unlucky ill【B6】_their cold sympto