1、大学英语六级模拟试卷 700及答案与解析 一、 Part I Writing (30 minutes) 1 Directions: 以 “新年决心书 “为题写一篇演讲稿，至少应包括以下两方面的内容 : 1. 总结自己在学习上的不足以及今后的打算。 2.在全面提高自身素质方面有什么打算。 二、 Part II Reading Comprehension (Skimming and Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and
2、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 contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 2 Ali
3、ens Are there other forms of life in the universe? The scientific search for extraterrestrial (ET) life forms has been bolstered by two recent discoveries. First, the discovery of life forms in exotic environments on Earth indicates that life is very hearty and can adapt to the strangest and most ho
4、stile environments. Second, astronomers found planets orbiting stars besides our sun over 50 extrasolar planets have been discovered as of 2001. Are there alien life forms on any of these planets? If alien life does exist, what might it be like? Would it be simple forms of life such as bacteria, vir
5、uses or algae, or more advanced, multi-cellular creatures, perhaps even intelligent beings? Would aliens be animals, plants or have characteristics of both? Would they have arms and legs and walk upright as we do? Would they depend upon vision as their primary sense or use another way to gather info
6、rmation about their surroundings? Would they “breathe“ oxygen or some other gas? Greetings, Carbon-based Bipeds(两足动物 )! Most of us picture alien life the way its portrayed in movies, where aliens are commonly depicted as human-like forms because they use actors either to play the roles directly in m
7、ake up or to be models for computer-generated animation. Also, audiences relate to human-like aliens better than to more exotic, monster like. However, the human body plan bilateral symmetry with one head, two legs and two arms stems from when early animals such as lizard, crocodile, or dinosaur col
8、onized the Earths land masses, and it seems unlikely that such a shape would evolve on an alien world. So, lets forget Hollywood for the moment and look closely at the real science of astrobiology. Astrobiology is the scientific study of life in the universe. Astrobiologists seek to understand (amon
9、g other things) how life arose and evolved on Earth, what governs the way life is organized and what makes a planet habitable. Astrobiology combines the disciplines of biology, chemistry, physics, geology and astronomy. Often, astrobiologists must use the information learned about life on Earth as a
10、 guide for studying life elsewhere. Lets examine some of the unusual things that we have learned from life on Earth: Life in the Extreme Up until about 30 years ago, it was believed that all life on Earth was dependent upon energy from the sun. Furthermore, it was thought that you would probably not
11、 find life where temperatures were extremely hot, like in geysers or hot springs, or extremely cold, like in the Antarctic desert. These ideas changed when oceanographers explored hydrothermal vents, openings in the ocean floor where extremely hot, mineral-rich water erupts from the crust. Hydrother
12、mal vents are located several miles below the surface, on the ocean floor, where the surrounding water is at or near freezing, it is absolutely dark and the pressure is high. In organized communities around the bases of these vents, called black smokers, scientists found clams, crabs and exotic, gia
13、nt tubeworms measuring 6 feet (2 meters) long. The water coming out of these vents is 230 to 662 degrees Fahrenheit (110 to 350 degrees Celsius). How can these animals survive so far from the sunlight, under these extreme conditions? In the water, scientists found species of bacteria that split hydr
14、ogen sulfide(硫化物 )from the water to get energy to make organic compounds. The tubeworms have bacteria in their tissues that help them derive energy from the water. The clams feed on the bacteria, and the crabs feed on the tubeworms. The discovery of hydrothermal-vent communities showed that it is po
15、ssible for life to evolve in places without light from the sun, and in other worlds without sufficient light from the parent star. In view of the discovery of hydrothermal vents, it may be possible that life exists on Europa, an icy moon of Jupiter, which scientists believe has a water ocean beneath
16、 its icy crust. Life has been found in other extreme environments as well. Scientists discovered microcolonies of lichens(地衣 ) called cryptoendoliths in rock samples of the Antarctic desert, where temperatures often drop to 100 degrees below zero and there is little or no liquid water. In contrast,
17、thermophilic (heat-loving) bacteria have been found in hot springs where temperatures exceed the boiling point of water. If life can evolve in extreme environments on Earth, it seems possible that life may exist in the extreme environments of other worlds such as mars. Speculation: What Might Aliens
18、 be Like? Since no extraterrestrial life forms have been conclusively discovered, alien physiology lies in the realm of our imagination. Science-fiction authors, especially the “hard“ ones who try to adhere strictly to real science, have been doing this for years. They first design or build a world,
19、 carefully working out its physical, astronomical and ecological characteristics. Next, they work out what type of aliens could exist in that world. An example of one such world-building exercise can be found at the Epona Project, where several science-fiction writers came together to create a world
20、 called Epona, complete with planetary, geological and ecological data. One artist, Steven Hanly, created Epona creatures. For his novel “Mission of Gravity,“ Hal Clement created a world called Mesklin that circles a double star. Mesklin rotates once every eighteen minutes and has a flattened shape
21、caused by its rotation. The gravity of Mesklin ranges from three times Earths gravity, at the equator, to seven hundred times at the poles. Mesklin has a hydrogen atmosphere and methane(甲烷 ) oceans. Mesklinites, one of the planets life forms, are small, centipede-like creatures made of an insect ske
22、letal protein called chitin. They have 18 pairs of legs that end in sucker-like feet, forward pinchers for grasping, a strong circulatory system and absorb hydrogen right through their shells. They are immensely strong a result of living on a high-gravity world, yet they have a fear of being picked
23、up because a fall from a small height could be fatal on such high gravity. Previously weve envisioned an alien world and alien life forms. In our world, the planet orbits a bright star. Only 10 percent of the world is covered with surface water, but throughout the land mass there are pockets of wate
24、r that collect under the sands from the sparse rainfall. The enyironment is hot and arid and the sunshine is bright. The planet is massive and has gravity that is one-hundred times stronger than that of Earth. The atmosphere is an Earth-like air mixture of helium, oxygen and carbon dioxide. The two
25、alien life forms that we envision for this world are animals mobile predators that live around the planets few small bodies of surface water. Both aliens are short, about 1 foot (30 centimeters) tall, with thick limbs to support their weight against the immense gravity. Both have thick coverings or
26、skins to minimize evaporation and conserve water. To gather information, one relies primarily on vision, while the other uses chemical senses (taste and smell). The Lashlarm is our first alien predator. It looks like a walking toilet bowl. The mouth portion is supported by three stalky legs connecte
27、d to a flat base. Underneath the base are many scales, so the base glides across the surface of the sand much like a snake moves along the ground. It has several sensory appendages that allow it to locate prey by chemical means. It hunts near the small bodies of surface water, feeling along the wate
28、rs edge and tasting the sand and water for other animals. Upon locating prey, the Lashlarm crouches down and glides up to it. The Lashlarm then opens its large mouth and springs down upon the prey, swallowing it whole. The Nirba is slightly larger than the Lashlarm. It lives in the water, near the e
29、dge, much like a crocodile or alligator but is not fully aquatic(水栖的 ). The Nirba comes out to prey on other animals that come down to the water, particularly the Lashlarm. It has a large head with nostrils located on top of its nose so it can breathe while mostly submerged. The Nirba has thick skin
30、, to prevent dehydration while out of the water in the hot sun, and big, muscular front legs with large claws for killing its prey. A long tail helps it swim in the water, and the “arrowhead“ end assists in hunting and territorial defense. 2 There may be other life forms in the universe because over
31、 50 extrasolar planets were discovered in 2001. （ A） Y （ B） N （ C） NG 3 In some movies where aliens are created as the enemy of human, they are usually monster-like creatures. （ A） Y （ B） N （ C） NG 4 Astrobiology, a branch science combining many other branches, studies the life on Earth. （ A） Y （ B）
32、 N （ C） NG 5 We used to believe that life could not exist under extremely hot or cold environment. （ A） Y （ B） N （ C） NG 6 The animals living in extreme oceanic environments have to feed on certain bacteria that help them get energy from_. 7 Because people have not convincingly found any alien life
33、forms, such forms are just our_. 8 For creatures living under high-gravity condition in Hal Clements novel, even a fall from a notvery-high place can be_. 9 In the extremely hot and dry environment, creatures are imagined to have _ to minimize loss of water and conserve it. 10 According to the autho
34、rs imagination, in order to glide on the sand smoothly, the creature Lashlarm must have_. 11 With its body almost totally under water, the Nirba can still breathe because its nostrils are on top of_ Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations.
35、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. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best a
36、nswer. （ A） $200. （ B） $130. （ C） $180. （ D） $50. （ A） At a railway station. （ B） At an airport. （ C） On a road. （ D） In an office. （ A） She likes postcards. （ B） She lives in Tokyo. （ C） She is going to Tokyo. （ D） She has traveled all over the world. （ A） A pair of shoes. （ B） A red scarf. （ C） A
37、stamp album. （ D） A Kenny Gs album （ A） Nothing could help the man if he did no exercises. （ B） No medicine could solve the mans problem. （ C） The man should eat more and do more exercises. （ D） Right food and proper exercises are important for the mans health. （ A） To build libraries for communitie
38、s is of no need at all. （ B） It would take long time to build public libraries for communities. （ C） Building libraries are meaningful and should have been done earlier. （ D） The city council has no funds to build libraries for communities. （ A） Required degree. （ B） Good characters. （ C） Good look.
39、 （ D） Age. （ A） Victor doesnt have many good ideas. （ B） Victor doesnt put his ideas into practice. （ C） Victor has too many dreams. （ D） Victor sleeps too much. （ A） He searched information on the Internet. （ B） He chatted with people from South America. （ C） He was on line all the time and fired h
40、imself out. （ D） He wrote a paper on the computer for his project. （ A） It has so many useful websites to classify. （ B） Chatting on the Net really takes a lot of time. （ C） Useful websites are not available in a search. （ D） Too many useless sites make it longer to find things. （ A） To continue his
41、 chat With the South Americans. （ B） To read the materials he got from the Net. （ C） To search for more relevant information. （ D） To have a face-to-face talk with the woman. （ A） Being outdoors. （ B） The bad weather. （ C） The danger of driving at night. （ D） Dealing with different people. （ A） Driv
42、ing in unsettled weather. （ B） Taking long drives outside the city. （ C） Meeting interesting people in the city. （ D） Being able to enjoy the world of nature. （ A） Different in personality. （ B） Rude to women drivers. （ C） Rather difficult to please. （ D） Talkative and generous with tips. （ A） She c
43、omplains a lot. （ B） She plans to quit her job. （ C） She is very familiar with the city. （ D） She is often criticized by her customers. Section B Directions: 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
44、will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. （ A） Being arrested. （ B） In police custody. （ C） Before a judge. （ D） In court. （ A） Day in court. （ B） Search warrants. （ C） Rights of citizens. （ D） Police and criminal
45、. （ A） Cruel deception. （ B） Legal document. （ C） Personal appeal. （ D） A letter from the court. （ A） The coffee market in Boston. （ B） The role of supermarkets in the coffee business. （ C） A new trend in the United States. （ D） The advertising of a new product. （ A） Gourmet coffee is less expensive
46、. （ B） Regular brands of coffee have too much caffeine. （ C） Gourmet coffee tastes better. （ D） Gourmet coffee is grown in the United States. （ A） They will run out of coffee. （ B） They will successfully compete with gourmet coffee sellers. （ C） They will introduce new regular brands of coffee. （ D）
47、 They will lose some coffee business. （ A） He thinks neither of the work patterns is good. （ B） He believes that longer working hours is better. （ C） He prefers shorter working hours to longer ones. （ D） He says nothing certain about which pattern is better. （ A） Spain. （ B） France. （ C） America. （
48、D） Germany. （ A） Americans are happier than Europeans. （ B） The GDP of Europe is higher than that of America. （ C） People all over the world choose to work less when they are richer. （ D） Two possible reasons are given for working longer hours in the US. （ A） Staying at Home （ B） Work and Happiness
49、（ C） Work and Productivity （ D） Americans and Europeans Section C Directions: In this section, you will hear a passage three times. When the passage is read 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 information. For these blanks, you can either use t
