1、考博英语-524 及答案解析(总分：100.00，做题时间：90 分钟)一、Part I Reading Compr(总题数：0，分数：0.00)二、Passage 1(总题数：1，分数：8.00)Although vocal cords are lacking in cetaceans, phonation is undoubtedly centered in the larynx.The toothed whales or odontocetes (sperm whales and porpoises) are much more vociferous than the whalebone
2、 whales, or mysticetes. In this country observers have recorded only occasional sounds from two species of mystieetes (the humpback and right whale). A Russian cetologist reports hearing sounds from at least five species of whalebone whales but gives no details of the circumstances or descriptions o
3、f the sounds themselves. Although comparison of the sound-producing apparatus in the two whale groups cannot yet be made, it is interesting to note that the auditory centers of the brain are much more highly developed in the odontocetes than in the mystieetes, in fact, to a degree unsurpassed by any
4、 other mammalian group.（分数：8.00）(1).Which of the following animals has the most highly developed auditory center in the brain?（分数：2.00）A.Elephants.B.Humpback whales.C.Racoons.D.Sperm whales.(2).The noises produced by whales _.（分数：2.00）A.are produced in the upper part of the windpipeB.are louder than
5、 those of other sea animalsC.are used to locate their matesD.can be heard only by other whales(3).According to the information given _.（分数：2.00）A.porpoises have vocal cords but right whales do notB.Russians report vocal cords in five species of whalesC.there is a correlation between vocal cords and
6、auditory areas of the brainD.whales do not have vocal cords(4).In which of the following is the auditory center of the brain most highly developed?（分数：2.00）A.Humpback whale.B.Right whale.C.Sperm whale.D.Whalebone whal三、Passage 2(总题数：1，分数：8.00)Then felt like some watcher of the skiesWhen a new planet
7、 swims into his ken,Or like stout Cortez, when with eagle eyesHe stared at the Pacific-and all his menLooked at each other with a wild surmise-Silent, upon a peak in Darien.-KeatsWith these well loved lines John Keats recognized the most important geographical event in all the world, excepting only
8、the feat of the Admiral Columbus himself. It was the discovery by European men of a vast sheet of water covering nearly 40 per cent of the globe-the ocean later to be named Pacific by Ferdinand Magellan because of its seeming tranquility. It is too bad that Keats beautiful lines erred in naming stou
9、t Cortez instead of the equally stout Balboa, a hero of much courage and perseverance.Too bad it was, too, for the immortal Vasco Nunez de Balboa, that communications in his day were so slow and uncertain. Had they been better he might well have avoided losing his head for his pains in bringing reno
10、wn to Spain and incalculable new knowledge to the civilized world. For lose it be did, under the axe at the insance of a jealous governor.（分数：8.00）(1).The author quotes the six lines from John Keats poem to call attention to _.h. the beauty of the poetry B. Keats historical errorC. the vastness of t
11、he Pacific D. the silence in Darien（分数：2.00）A.B.C.D.(2).The Pacific Ocean _.（分数：2.00）A.is the largest ocean in the worldB.is placidC.was first seen by man when Balboa looked at itD.was seen by Columbus(3).Balboa was _.（分数：2.00）A.mistaken for CortezB.a member of Magellans crewC.decapitatedD.slow and
12、uncertain(4).The feeling described by Keats may best be described as one of _.（分数：2.00）A.amazementB.silenceC.aweD.admiration四、Passage 3(总题数：1，分数：8.00)The range in frequencies of musical sounds is approximately 20- 20,000 cycles per second (cy/sec), Some people can hear higher frequencies than others
13、. Longitudinal waves whose frequencies are higher than those within the audible range are called ultrasonic frequencies. Ultrasonic frequencies are used in sonar for such purposes as submarine detection and depth finding. Ultrasonic frequencies are also being tried for sterilizing food since these f
14、requencies kill some bacteria. Sound waves of all frequencies in the audible range travel at the same speed in the same medium. In the audible range, the higher the frequency of the sound the higher is the pitch. The term supersonic refers to speed greater than sound. An airplane traveling at supers
15、onic speed is moving at a speed greater than the speed of sound in air at that temperature. Mach 1 means a speed equal to that of sound. Mach 2 means a speed equal to twice that of sound, etc.Musical sounds have three basic characteristics; pitch, loudness, and quality or timbre. As was indicated ab
16、ove, pitch is determined largely by the frequency of the wave reaching the ear. The higher the frequency the higher is the pitch. Loudness depends on the amplitude of the wave reaching the ear. For a given frequency, the greater the amplitude of the wave the louder the sound. To discuss quality of s
17、ound we need to clarify the concept of overtones. Sounds are produced by vibrating objects. If these objects are given a gentle push, they usually vibrate at one definite frequency producing a pure tone. This is the way a tuning fork is usually used. When objects vibrate freely after a force is mome
18、ntarily applied, they are said to produce their natural frequency. Some objects, like strings and air columns, can vibrate naturally at more than one frequency at a time. The lowest frequency which an object can produce when vibrating freely is known as the objects fundamental frequency. Other frequ
19、encies that the object can produce are known as its overtones. The quality of a sound depends on the number and relative amplitude of the overtones present in the wave reaching the ear.（分数：8.00）(1).A soprano would probably have a frequency of _.（分数：2.00）A.200 cy/secB.5,000 cy/secC.10,000 cy/secD.20,
20、000 cy/sec(2).The timbre of a musical sound is dependent on its _.（分数：2.00）A.fundamentalB.amplitudeC.frequencyD.overtones(3).Which of the following individuals would likely use terms like Math 5 or Mach 9?（分数：2.00）A.Jet pilot.B.Musician.C.Astronaut.D.Submarine navigator.(4).Ultrasonic frequencies ar
21、e _.（分数：2.00）A.inaudibleB.excessively fastC.characterized by a great amplitudeD.death rays五、Passage 4(总题数：1，分数：8.00)There are exceptions to the rule of male insects being smaller than the females, and some of these exceptions are intelligible. Size and strength would be an advantage to the males whi
22、ch fight for the possession of the females, and in these cases, as with the stag-beetle (Lucanus), the males are larger than the females. There are, however, other beetles which are not known to fight together, of which the males exceed the females in size, and the meaning of this fact is not known,
23、 but in some of these cases, as with the huge Dynastes and Megasoma, we can at least see that there would be no necessity for the males to be smaller than the females, in order to be matured before them, for these beetles are not short-lived, and there would be ample time for the pairing of the sexe
24、s.（分数：8.00）(1).According to the author, _.（分数：2.00）A.male insects are always smaller than femalesB.in a given species nature provides differences between sexes to insure successful reproductionC.size and strength protect females from other femalesD.longevity is characteristic of the Dynastes and Meg
25、asoma(2).Where male beetles are smaller than female beetles, it is because _.（分数：2.00）A.they have to fight for their matesB.they are more intelligentC.they are ephemeral creaturesD.there is ample time for mating(3).The paragraph preceding this one probably _.（分数：2.00）A.discusses a generalization abo
26、ut the size of animalsB.develops the idea that male insects do not live long after maturityC.discusses male and female beetlesD.emphasizes that beetles are belligerent animals(4).The male Lucanus is particularly _.（分数：2.00）A.adaptableB.strongC.intelligentD.belligerent六、Passage 5(总题数：1，分数：8.00)Agreea
27、ble to your request, I send you my reasons for thinking that our northeast storms in North America begin first, in point of time, in the southwest parts: that is to say, the air in Georgia, the farthest of our colonies to the Southwest, begins to move southwesterly before the air of Carolina, begins
28、 to move southwesterly before the air of Carolina, which is the next colony northeastward. The air of Carolina has the same motion before the air of Virginia, which lies still more northeastward, and so on northeasterly through Pennsylvania, New York, New England, pitch, loudness, and quality or tim
29、bre. As was indicated above, pitch is determined largely by the frequency of the wave reaching the ear. The higher the frequency the higher is the pitch. Loudness depends on the amplitude of the wave reaching the ear. For a given frequency, the greater the amplitude of the wave the louder the sound.
30、 To discuss quality of sound we need to clarify the concept of overtones. Sounds are produced by vibrating objects. If these objects are given a gentle push, they usually vibrate at one definite frequency producing a pure tone. This is the way a tuning fork is usually used. When objects vibrate free
31、ly after a force is momentarily applied, they are said to produce their natural frequency. Some objects, like strings and air columns, can vibrate naturally at more than one frequency at a time. The lowest frequency which an object can produce when vibrating freely is known as the objects fundamenta
32、l frequency. Other frequencies that the object can produce are known as its overtones. The quality of a sound depends on the number and relative amplitude of the overtones present in the wave reaching the ear.（分数：8.00）(1).A soprano would probably have a frequency of _.（分数：2.00）A.200 cy/secB.5,000 cy
33、/secC.10,000 cy/sec D.20,000 cy/sec解析：女高音的频率很可能是 10 000 周/秒。作者在第一段开头说，音乐的频率范围大约在 2020 000周/秒之间，女高音的频率不可能是 200 周/秒，不可能是 500 周/秒，也不可能是 20 000 周/秒，因此可猜测 10 000 周/秒。(2).The timbre of a musical sound is dependent on its _.（分数：2.00）A.fundamentalB.amplitudeC.frequencyD.overtones 解析：音乐的音质取决于它的泛音。作者在第二段末尾说，声
34、音的音质取决于泛音的数量和泛音的相对振幅。(3).Which of the following individuals would likely use terms like Math 5 or Mach 9?（分数：2.00）A.Jet pilot.B.Musician.C.Astronaut. D.Submarine navigator.解析：宇航员很可能使用象 Math 5 或 Mach 9 这样的术语。作者在第一段末尾说，超声速这个术语指速度远远超过声音。以超声频的速度飞行的飞机的移动速度比空气中声音的速度要大得多，马赫数 1 指等于声速的速度，马赫数 2 指等于声速 2 倍的速度。马
35、赫数 5 和马赫数 9 远远超过声音的速度，因此驾驶超音速飞机的宇宙航行员很可能用马赫数 5 和马赫数 9 这样的术语。(4).Ultrasonic frequencies are _.（分数：2.00）A.inaudible B.excessively fastC.characterized by a great amplitudeD.death rays解析：超声频率是听不见的。答案可以在第一段找到。作者说，其频率远远大于可以听见的音域的纵波被称为超声频率。这说明，超声繁率是听不见的。五、Passage 4(总题数：1，分数：8.00)There are exceptions to the
36、 rule of male insects being smaller than the females, and some of these exceptions are intelligible. Size and strength would be an advantage to the males which fight for the possession of the females, and in these cases, as with the stag-beetle (Lucanus), the males are larger than the females. There
37、 are, however, other beetles which are not known to fight together, of which the males exceed the females in size, and the meaning of this fact is not known, but in some of these cases, as with the huge Dynastes and Megasoma, we can at least see that there would be no necessity for the males to be s
38、maller than the females, in order to be matured before them, for these beetles are not short-lived, and there would be ample time for the pairing of the sexes.（分数：8.00）(1).According to the author, _.（分数：2.00）A.male insects are always smaller than femalesB.in a given species nature provides differenc
39、es between sexes to insure successful reproductionC.size and strength protect females from other femalesD.longevity is characteristic of the Dynastes and Megasoma 解析：根据作者的观点，长寿是 Dynastes 和 Megasoma 这两种甲壳虫的特征。作者在最后一句说，这些甲壳虫生存的时间并不短，这当然是说这两种甲壳虫长寿。(2).Where male beetles are smaller than female beetles,
40、 it is because _.（分数：2.00）A.they have to fight for their matesB.they are more intelligentC.they are ephemeral creatures D.there is ample time for mating解析：如果雄性甲壳虫比雌性甲壳虫小，那是因为它们是短命的动物。在本文末尾几句，尽管作者在讨论大的雄性甲壳虫，但是我们可以了解到为什么另外一些雄性甲壳虫要小一些，是因为它们成熟得早一些，还因为它们短命。(3).The paragraph preceding this one probably _.
41、（分数：2.00）A.discusses a generalization about the size of animals B.develops the idea that male insects do not live long after maturityC.discusses male and female beetlesD.emphasizes that beetles are belligerent animals解析：该自然段之前的那个自然段很可能讨论动物大小的一般规律。可以这样推理：作者在本段第一句说，就雄性昆虫比雌性昆虫要小这一规律而言，存在一些例外。前面的自然段肯定在讨
42、论这一规律。(4).The male Lucanus is particularly _.（分数：2.00）A.adaptableB.strongC.intelligentD.belligerent 解析：雄性的锹形甲壳虫尤其好斗。本文的第二句说，雄性的锹形甲壳虫比雌性甲壳虫要大、要强壮。在同一句，我们了解到雄性甲壳虫为得到雌性甲壳虫而争斗。所以说，雄性甲壳虫尤其好斗。六、Passage 5(总题数：1，分数：8.00)Agreeable to your request, I send you my reasons for thinking that our northeast storms
43、in North America begin first, in point of time, in the southwest parts: that is to say, the air in Georgia, the farthest of our colonies to the Southwest, begins to move southwesterly before the air of Carolina, begins to move southwesterly before the air of Carolina, which is the next colony northe
44、astward. The air of Carolina has the same motion before the air of Virginia, which lies still more northeastward, and so on northeasterly through Pennsylvania, New York, New England, First, some schools, colleges and universities, hospitals, companies and other enterprises are not concerned with imp
45、roving their working and living conditions. Second, some professionals find it hard to bring their talents into full play. They are envied for their talents and achievements, so they choose to leave. Last but not least, some employers do not cherish talents. They think that another will come if one
46、talent goes away and that the world still goes round without an important person or even without hundreds of important persons.Based on the above-mentioned reasons, I would like to make the following suggestions. First, love talents just as you love your eyes, do not suppress those who are more talented than you. Second, improve talents living and working conditions. Only in this way can brain drain be prevented.)解析：
