[外语类试卷]专业英语八级模拟试卷646及答案与解析.doc
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1、专业英语八级模拟试卷 646及答案与解析 SECTION A MINI-LECTURE Directions: In this section you sill hear a mini-lecture. You will hear the lecture ONCE ONLY. While listening, take notes on the important points. Your notes will not be marked, but you will need them to complete a gap-filling task after the mini-lecture.
2、 When the lecture is over, you will be given two minutes to check your notes, and another ten minutes to complete the gap-filling task on ANSWER SHEET ONE. Use the blank sheet for note-taking. 0 Going Underground Because of the【 1】 _ associations 【 1】 _ with the dark underground, living underground
3、in the future may not seem a good idea. But there are advantages to an underground living. First, the【 2】 _ would cease to be a 【 2】 _ trouble. There is no problem of keeping a 【 3】 _ temperature. So it can save much 【 3】 _ energy. We are also safe from the【 4】 _. 【 4】 _ caused by bad weather. Secon
4、d, there would be no【 5】 _ time. 【 5】 _ As the daylight is man-made, it could be【 6】 _. 【 6】 _ to meet our needs. Third, the【 7】 _ stability could be 【 7】 _ ensured. Human habitation damages the wild and【 8】 _. many species of their natural 【 8】 _ habitat. Moving underground would turn the Earths su
5、rface back to wilderness and greenery. Fourth, nature would be【 9】 _. 【 9】 _ Instead of a withdrawal from the natural world, living underground would make us easier to reach countryside than living above ground. The countryside is just a few hundred yards【 10】 _. 【 10】 _ the city. 1 【 1】 2 【 2】 3 【
6、3】 4 【 4】 5 【 5】 6 【 6】 7 【 7】 8 【 8】 9 【 9】 10 【 10】 SECTION B INTERVIEW Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds t
7、o answer each of the following five questions. Now listen to the interview. 11 Who are the speakers? ( A) Salesmen. ( B) Editors. ( C) Cooks. ( D) Advertising agents. 12 What product are they talking about? ( A) Kitchen. ( B) Deep-freezer. ( C) Mobility units. ( D) Cake mixer 13 What is the relation
8、ship between the two speakers? ( A) Employer and employee ( B) Salesman and customer ( C) Advertiser and customer ( D) Colleagues 14 How is the kitchen different from all other kitchens on the market? ( A) It is easier to clean and repair ( B) It is non-fixed and flexible ( C) All its units are of t
9、he same height ( D) Its chopping board is nearer to the sink 15 What can you infer from the conversation? ( A) Terry knows less about kitchen than Joyce ( B) Joyce knows more about kitchen than Joyce ( C) Terry knows as much about the kitchen as Joyce ( D) Terry knows as much about the kitchen as Jo
10、yce SECTION C NEWS BROADCAST Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. At the end of each news item, you will be given 10 seconds to answer the questions. 16 According to the news, what makes this credit card different
11、 from conventional ones is ( A) that it can hear the owners voice. ( B) that it can remember a password. ( C) that it can identify the owners voice. ( D) that it can remember the owners PIN. 17 The newly developed credit card is said to have all the following EXCEPT ( A) switch. ( B) battery. ( C) s
12、peaker. ( D) built-in chip. 17 Eight times within the past million years, something in the Earths climatic equation has changed, allowing snow in the mountains and the northern latitudes to accumulate from one season to the next instead of melting away each time. The enormous ice sheets resulting fr
13、om this continual buildup lasted tens of thousands of years until the end of each particular glacial cycle brought a warmer climate. Scientists speculated that these glacial cycles were ultimately driven by astronomical factors: slow cyclic changes in the eccentricity of the Earths orbit and in the
14、tilt and orientation of its spin axis. But up until around 30 years ago, the lack of an independent record of ice age timing made the hypothesis untestable. Then in the early 1950s Emiliani produced the first complete record of the waxings and wanings of past glaciations. It came from a seemingly od
15、d place. The seafloor single-cell marine organisms called “foraminifera“ house themselves in shells made from calcium carbonate. When the foraminifera die, sink to the bottom, and become part of seafloor sediments, the carbonate of their shells preserves certain characteristics of the seawater they
16、inhabited. In particular, the ratio of a heavy isotope of oxygen (oxygen-18) to ordinary oxygen (oxygen-16) in the carbonate preserves the ratio of the two oxygens in water molecules. It is now understood that the ratio of oxygen isotopes in seawater closely reflects the proportion of the worlds wat
17、er locked up in glaciers and ice sheets. A kind of meteorological distillation accounts for the link. Water molecules containing the heavier isotope tend to condense and fall as precipitation slightly sooner than molecules containing the lighter isotope. Hence, as water vapor evaporated from warm oc
18、eans moves away from its source, its oxygen-18 returns more quickly to the oceans than does its oxygen-16. What falls as snow on distant ice sheets and mountain glaciers is relatively depleted of oxygen-18. As the oxygen-18-poor ice builds up the oceans become relatively enriched in the isotope. The
19、 larger the ice sheets grow, the higher the proportion of oxygen-I 8 becomes in seawaterand hence in the sediments. Analyzing cores drilled from seafloor sediments, Emiliani found that the isotopic ratio rose and fell in rough accord with the Earths astronomical cycles. Since that pioneering observa
20、tion, oxygen-isotope measurements have been made on hundreds of cores. A chronology for the combined record enables scientists to show that the record contains the very same periodicities as the orbital processes. Over the past 800,000 years, the global ice volume has peaked every 100,000 years, mat
21、ching the period of the orbital eccentricity variation. In addition, “wrinkles“ superposed on each cycle-small-decrease or surge in ice volume have come at intervals of roughly 23,000 and 41, 000 years, in keeping with the precession and tilt frequencies of the Earths spin axis. 18 Which of the foll
22、owing best expresses the main idea of the passage? ( A) Marine sediments have allowed scientists to amass evidence tending to confirm that astronomical cycles drive the Earths glacial cycles. ( B) The ratio between two different isotopes of oxygen in seawater correlates closely with the size of the
23、Earths ice sheets. ( C) Surprisingly, single-cell marine organisms provide a record of the Earths ice ages. ( D) The Earths astronomical cycles have recently been revealed to have an unexpectedly large impact on the Earths climate. 19 The passage asserts that one reason that oceans become enriched i
24、n oxygen-18 as ice sheets grow is because_. ( A) water molecules containing oxygen-18 condense and fall as precipitation slightly sooner than those containing oxygen-16 ( B) the ratio of oxygen-18 to oxygen-16 in water vapor evaporated from oceans if different from that of these isotopes in seawater
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- 外语类 试卷 专业 英语 模拟 646 答案 解析 DOC
