[考研类试卷]考研英语(阅读)模拟试卷206及答案与解析.doc
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1、考研英语(阅读)模拟试卷 206 及答案与解析Part ADirections: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)0 Familiar as it may seem, gravity remains a mystery to modern physics. Despite several decades of trying, scientists have failed to fit Einsteins general
2、 theory of relativity, which describes how gravity holds big objects together, with the quantum mechanics (an extension of statistical mechanics based on quantum theory) he pioneered, which describes the tiny fundamental particles of whichmatter consists and the forces by which they interact.Recent
3、discoveries have highlighted further problems.Many physicists are therefore entertaining the idea that Einsteins ideas about gravity must be wrong or at least incomplete. Showing exactly how and where the great man erred is the task of the scientists who gathered at the “Rethinking Gravity“ conferen
4、ce at the University of Arizona in Tucson this week.One way to test general relativity is to examine ever more closely the assumptions on which it rests, such as the equivalence principle: that gravity accelerates all objects at the same rate, regardless of their mass or composition. This principle
5、was famously demonstrated by Galileo Galilei some 400 years ago when he simultaneously dropped cannon and musket balls, and balls made of gold, silver and wood, from the Tower of Pisa. Each appeared to hit the ground at the same time.A more precise test requires a taller tower. In effect, researcher
6、s are sending balls all the way to the moon and back. Tom Murphy, of the University of California, San Diego, and his colleagues fire laser beams from the deserts of New Mexico at reflectors placed on the moon by American and Russian spacecraft in the late 1960s and early 1970s. They use a telescope
7、 to capture the small fraction of the light that returns. Because the speed of light is known, they can calculate the distance between the Earth and the moon from the time taken for light to pass through it.According to general relativity, because the Earth and the moon orbit the sun, they should “f
8、all“ towards it at the same rate, in the same way as Galileos balls fell to the ground. By repeatedly measuring the distance between them, scientists can calculate the orbits of the Earth and the moon around the sun relative to each other. If the equivalence principle were violated, the moons orbit
9、around the Earth would not appear straight, either towards or away from the sun So far, Dr Murphy told the conference, these experiments have merely confirmed the equivalence principle to one part in 10 trillion. Dr Murphy and his colleagues hope that even more precise measurements could ultimately
10、show general relativity to be only approximately correct. This would usher in a new revolution in physics.1 It is stated in Paragraph 1 that the theory of relativity(A)is beyond all the current scientists understanding.(B) has failed Albert Einstein for years.(C) seems at odds with the quantum mecha
11、nics.(D)is useful in holding big things together.2 Scientists present at the “Rethinking Gravity“ conference(A)unanimously believe that Einsteins general theory of relativity is wrong.(B) have found further problems about the general theory of relativity.(C) question the assumptions of the general t
12、heory of relativity.(D)are trying to find out the possible flaws of the gravity theory.3 Galileo Galileis experiment at the Tower of Pisa around 400 years ago(A)was one way of testing Einsteins general theory of gravity.(B) illustrated the insignificance of mass and composition of an object.(C) acte
13、d as a well-known example to testify the equivalence principle.(D)showed that all objects on Earth were influenced by gravity.4 Tom Murphy and his colleagues fire laser beams at reflectors on the moon with the aim to(A)measure the distance between the moon and the Earth.(B) calculate the speed of li
14、ght.(C) check how long it takes light to cross it.(D)prove the equivalence principle more accurately.5 What can we infer from the last paragraph?(A)General relativity is actually ungrounded at all.(B) The calculation of the orbits shows that equivalence principle is violated(C) More should be done t
15、o prove the correctness of equivalence principle.(D)A new revolution in physics has already arrived.5 Today, at the push of a button, you can download and print the whole of Dantes Divine Comedy, using only a computer, an Internet connection, a paving stone of paper and a small bucket of ink. Techni
16、cally, the service is free, although it would be easier and cheaper simply to buy the book, which could then be read in the bath, while saving on printer cartridges and trees.The new service is the latest step in the stated goal of Google, the Internet search engine, “to organize the worlds informat
17、ion and make it universally accessible and useful“ and, although few may be rushing to print out the Digitized Dante, it marks an important development in world literature. For some, making books available online for free download represents a paradise found; others, including a number of worried pu
18、blishers and writers, fear it may point the way to the ninth circle of hell. Googles Book Search service is just one part of the Library Project, in which the Internet engine has teamed up with libraries around the world, including the Bodleian in Oxford, to digitize collections and make millions of
19、 books available and searchable online.At first sight, the notion of a limitless digital library seems irresistible, a single, free repository accessible from every corner of the globe. Partners in the Library Project say the system will enable users to access not just the classics, but also much mo
20、re obscure works: forgotten novels, scientific accounts, illustrations and neglected poetry. Moribund books may be brought back to life. Librarians are often frustrated at the unseen gems in their collections gathering dust. Now the whole lot can be digitally stacked on an endless virtual shelf, to
21、be browsed by anyone with a computer mouse.The problem lies not with digitalizing dead or undead books, but the potential danger to those that still have commercial life in them in the form of copyright. Google is quick to point out that the books available for download through Book Search are all o
22、ut of copyright. Indeed, while European law allows copyright to expire 70 years after an authors death, the new service does not offer anything published later than the mid-19th century. Some publishers, however, see the availability of free books for digital download as the thin end of a very large
23、 wedge that could split literature by undermining copyright itself. Last year the Association of American Publishers filed suit against Google claiming that by scanning 100 per cent of a book (to make it searchable by word) the company is infringing copyright, even if only a small excerpt is then av
24、ailable for free.Silence is golden in a library; but the law of copyright is beyond price.6 Dantes Divine Comedy is mentioned in Paragraph 1 to illustrate(A)the easy accessibility of online digital books.(B) the convenience of downloading and printing digital books.(C) that books downloaded and prin
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