[外语类试卷]专业英语八级(阅读)模拟试卷159及答案与解析.doc
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1、专业英语八级(阅读)模拟试卷 159及答案与解析 SECTION A MULTIPLE-CHOICE QUESTIONS In this section there are several passages followed by fourteen multiple-choice questions. For each multiple-choice question, there are four suggested answers marked A , B, C and D. Choose the one that you think is the best answer. 0 (1) T
2、heres this great recurring Saturday Night Live skit from several years back where Phil Hartman plays an unfrozen caveman who goes to law school. He pontificates (发表武断的意见 ) on the American judicial system while marveling at modern technology like The Tiny People in The Magic Box (a TV). It fits a com
3、mon stereotype; Human ancestors were, well, cavemen, and not as smart as we are today. A new hypothesis from a Stanford geneticist tries to turn this stereotype upside down. (2) Human intelligence may have actually peaked before our ancient predecessors ever left Africa, Gerald Crabtree writes in tw
4、o new journal articles. Genetic mutations during the past several millennia are causing a decline in overall human intellectual and emotional fitness, he says. Evolutionary pressure no longer favors intellect, so the problem is getting worse. He is careful to say that this is taking quite a long tim
5、e, so its not like your grandparents are models of brilliance while your children will be cavemen rivaling Hartmans SNL character. But he does maintain that an ancient Athenian, plucked from 1000 BC, would be “ among the brightest and most intellectually alive of our colleagues and companions. “ (3)
6、 His central thesis is that each generation produces deleterious (有害的 ) mutations, so down the line of human history, our intelligence is ever more impaired compared to that of our predecessors. (4) Not surprisingly, the hypothesis, published in the journal Trends in Genetics, has several geneticist
7、s scratching their heads. (5) “It takes thousands of genes to build a human brain, and mutations in any one of those can impair that process, thats absolutely true. Its also true that with each new generation, new mutations arise.but Crabtree ignores the other side of the equation, which is selectio
8、n,“ said Kevin Mitchell, associate professor at the Smurfit Institute of Genetics at Trinity College Dublin. “Natural selection is incredibly powerful, and it definitely has the ability to weed out new mutations that significantly impair intellectual ability. There are various aspects in these paper
9、s that I think are really just thinking about things in a wrong way. “ (6) Crabtree said he wanted to examine the cumulative effect of generation-to-generation mutation on intelligence, which is thought to be controlled by many genes. Using indexes that measure X-chromosome (染色体 )-related mental ret
10、ardation, he comes up with between 2,000 and 5,000 genes related to human intellectual ability. Using another index measuring average mutations that arise in each generation of children, he calculates that within 3,000 years, “we have all sustained two or more mutations harmful to our intellectual o
11、r emotional stability. “ (7) “There is a general feeling that evolution constantly improves us, but it only does that if there is selection applied,“ Crabtree said in an interview. “ In this case, it is questionable about how much selection is occurring now compared to the process of optimizing thos
12、e genes, which occurred in the jungles of Africa 500,000 years ago.“ (8) Theres already evidence for this in other areas, he argues: Take our sense of smell. Humans have far fewer olfactory receptors than other animals, he said were guided by our intellect now, not by smell. We can think about where
13、 a piece of food came from, how it was processed, which plant its from, who has been around it, and so on. A dog, on the other hand, simply sniffs something and either eats it or doesnt. (9) Similarly, he believes evolution now selects for other traits namely, the most healthy and the most immune, n
14、ot the most intelligent. (10) But geneticists took issue with his claims, not to mention his citations and methods. Mitchell took issue with Crabtrees characterization of genes he describes them as links in a chain, with incredible overall disruptive power. Theyre like a bulb on a string of Christma
15、s tree lights that suddenly fails to work, taking out the entire strand with it: “ It can be concluded that genes related to intelligence do not operate as a robust network, but rather as links in a chain, failure of any one of which leads to intellectual disability,“ he writes. Mitchell countered t
16、hat this ignores other genes that dont cause intellectual disability. (11) “Biological systems are robust to degradation of several different components,“ Mitchell said. “Evolution has gone to a lot of trouble to craft your genome so its finely honed to do its job, and it doesnt make sense that you
17、would have all this random mutation in your brain cells. Also, you would have a very high rate of brain cancer. “ 1 According to the passage, “Saturday Night Live“ skit is a_. ( A) TV series with a playful spirit ( B) documentary on human ancestors ( C) talk show on exotic experiences ( D) radio pro
18、gram on modern technology 2 Which of the following would Gerald Crabtree most likely DISAGREE with? ( A) Genetic mutations play a significant part in the decline of human intelligence. ( B) Harmful mutations tend to be unchangeable and easy to get rid of. ( C) Human beings today are no longer pressu
19、red to improve their intellect. ( D) Natural selection is useful in the process of evolution only on some occasions. 3 Kevin Mitchell raises doubts about Gerald Crabtrees hypothesis in all of the following aspects EXCEPT its_. ( A) self-contradictory nature ( B) neglect of the power of natural selec
20、tion ( C) research methodology and references ( D) characterization of genes 4 Which of the following would be the BEST title for the passage? ( A) A New Hypothesis Against a Common Stereotype. ( B) The Pros and Cons of Genetic Mutations. ( C) Human Intelligence Declined or Not? ( D) Evolution Proce
21、ss and Human Intellect. 4 (1) Social mobility in the U. K. could be reversed unless the government and universities make changes to encourage and pay for more students from disadvantaged backgrounds to take degrees, according to the governments independent adviser on the issue. Alan Milburn said in
22、a report that social mobility was now “flatlining at best“ after gains in the early part of the last decade. (2) “ Given the headwinds that universities and higher education institutions are facing tuition fees, student caps, public funding constraints theres a real danger things will go backwards,
23、rather than forwards,“ Milburn told The Guardian. “As the economy changes, who gets into university does become a very important driver of social mobility. “ (3) The report recommends changes across government policy and the way universities select, fund and encourage students from more disadvantage
24、d areas, who he argues have been shown to do better at university than pupils from private schools with the same grades. Suggestions include offering all students from poorer backgrounds an interview and considering offering places to those with lower grades. Acknowledging pressure on public spendin
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