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2023年3月大學(xué)英語六級閱讀真題以及答案

所屬教程:六級閱讀

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2024年11月27日

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英語六級閱讀真題,不僅強化詞匯與句型理解,更提升閱讀速度與綜合分析能力。實戰(zhàn)演練,讓考生熟悉題型變化,掌握解題技巧,是沖刺六級高分不可或缺的寶貴資源。今天,小編將分享2023年3月大學(xué)英語六級閱讀真題以及答案相關(guān)內(nèi)容,希望能為大家提供幫助!

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Section A

Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.

Unthinkable as it may be, humanity, every last person, could someday be wiped from the face of the Earth. We have learned to worry about asteroids( 小行星) and super volcanoes, but the more likely _26_ , according to Nick Bostrom, a professor of philosophy at Oxford, is that we humans will destroy ourselves.

Professor Bostrom, who directs Oxford's Future of Humanity Institute, has argued over the course of several papers that human _27_ risks are poorly understood and, worse still,_28_ underestimated by society. Some of these existential risks are fairly well known, especially the natural ones. But others are _29_ or even exotic. Most worrying to Bostrom is the subset of existential risks that _30_ from human technology, a subset that he expects to grow in number and potency over the next century.

Despite his concerns about the risks _31_ to humans by technological progress, Bostrom is no luddite(科技進步反對者). In fact, he is a longtime _32_ of trans-humanism— the effort to improve the human condition, and even human nature itself, through technological means. In the long run he sees technology as a bridge, a bridge we humans must cross with great care, in order to reach new and better modes of being. In his work, Bostrom uses the tools of philosophy and mathematics, in _33_ , probability theory, to try and determine how we as a _34_ might achieve this safe passage. What follows is my conversation with Bostrom about some of the most interesting and worrying existential risks that humanity might _35_ in the decades and centuries to come, and about what we can do to make sure we outlast them.

A) advocate 

B) arise  

C) emphasized  

D) encounter  

E) essential  

F) evaporation  

G) extinction  

H) obscure

I) particular

J) posed

K) scenario

L) severely

M) shrewdly

N) species

O) variety

Section B

Directions: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2.

San Francisco Has Become One Hug e Metaphor for Economic Inequality in America

A) The fog still chills the morning air and the cable cars still climb halfway to the stars. Yet on the ground, the Bay area has changed greatly since singer Tony Bennet left his heart here. Silicon Valley and the tech industry have led the region into a period of unprecedented wealth and innovation. But existing political and land limits have caused an alarming housing crisis and astronomical rise in social and economic difference.

B) While the residents of most cities display pride and support for their home industries, drastic market distortions in the San Francisco Bay Area have created boiling resentment in the region towards the tech industry. A vocal minority is even calling on officials to punish those who are benefitting from the economic and housing boom. If this boom and its consequences are not resolved, a drastic increase in social and economic difference may have a profound impact on the region for generations. A history and analysis of this transformation may hold invaluable insights about the opportunities. Perils of tech cities are currently being cultivated across the US, and indeed around the world.

C) According to a recent study, San Francisco ranks first in California for economic difference. The average income of the top 1% of households in the city averages $3.6 million. This is 44 times the average income of those at the bottom, which stands at $81,094. The top 1% of the San Francisco peninsula's share of total income now extends to 30.8% of the region's income. This was a dramatic jump from 1989, where it stood at15.8%.

D) The region's economy has been fundamentally transformed by the technology industry springing from Silicon Valley. Policies pushed by Mayor Ed Lee provided tax breaks for tech companies to set up shop along the city's long-neglected Mid-Market area. The city is now home to Twitter, Uber, Airbnb, Pinterest, Dropbox and others. In short, the Bay Area has become a global magnet for those with specialized skills, which has in turn helped fuel economic enthusiasm, and this economic growth has reduced unemployment to 3.4%, an admirable feat.

E) In spite of all that, the strength of the recent job growth, combined with policies that have traditionally limited housing development in the city and throughout the peninsula, did not help ease the affordability crisis. In2015 alone, the Bay Area added 64,000 in jobs. In the same year, only 5,000 new homes were built.

F) With the average house in the city costing over $1.25 million and average flat prices over $1.11 million, the minimum qualifying income to purchase a house has increased to $254,000. Considering that the average household income in the city currently stands at around $80,000, it is not an exaggeration to say that the dream of home ownership is now beyond the grasp of the vast majority of today's people who rent.

G) For generations, the stability and prosperity of the American middle class has been anchored by home ownership. Studies have consistently shown that the value of land has overtaken overall income growth, thus providing a huge advantage to property owners as a vehicle of wealth building. When home prices soar above the reach of most households, the gap between the rich and the poor dramatically increases.

H) If contributing factors leading to housing becoming less than affordable are not resolved over multiple generations, a small clite will control a vast share of the country's total wealth. The result? A society where the threat of class warfare would loom large. A society's level of happiness is tied less to measures of quantitative wealth and more to measures of qualitative wealth. This means that how a person judges their security in comparison to their neighbors' has more of an impact on their happiness than their objective standard of living. At the same time, when a system no longer provides opportunities for the majority to participate in wealth building, it not only robs those who are excluded from opportunities, but also deprives them of their dignity.

I) San Francisco and the Bay Area have long been committed to values which embrace inclusion and rejection of mainstream culture. To see these values coming apart so publicly adds insult to injury for a region once defined by its progressive social fabric. In the face of resentment, it is human to want revenge. But deteriorating policies such as heavily taxing technology companies or real estate developers are not likely to shift the balance.

J) The housing crisis is caused by two primary factors: the growing desirability of the Bay Area as a place to live due to its excellent economy, and our limited housing stock. Although the city is experiencing an unprecedented boom in new housing, more units are sorely needed. Protection policies were originally designed to suppress bad development and boost historic preservation in our urban areas. Now, too many developers are experiencing excessive delays. Meanwhile, there are the land limitations of the Bay Area to consider. The region is surrounded by water and mountains. Local governments need to aid development as well. This means increasing housing density throughout the region and building upwards while streamlining the approval process.

K) Real estate alone will not solve the problem, of course. Transportation, too, needs to be updated and infrastructure extended to link distant regions to Silicon Valley and the city. We need to build an effective high-speed commuting system linking the high-priced and crowded Bay Area with the low-priced and low- density Central Valley. This would dramatically reduce travel times. And based on the operating speeds of hovering trains used in countries such as Japan or Spain, high-speed rail could shorten the time to travel between San Francisco and California's capital, Sacramento, or from Stockton to San Jose, to under 30 minutes. This system would bring once distant regions within reasonable commute to heavy job centers. The city also needs to update existing transportation routes combined with smart home-building policies that dramatically increase housing density in areas surrounding high-speed rail stations. By doing so, we will be able to build affordable housing within acceptable commuting distances for a significant bulk of the workforce.

L) Our threatening housing crisis forces the difficult question of what type of society we would like to be. Will it be one where the elite command the vast bulk of wealth and regional culture is defined by an aggressive business world? We were recently treated to a taste of the latter, when local tech employee Justin Keller wrote an open letter to the city complaining about having to see homeless people on his way to work.

M) It doesn't have to be this way. But solutions need to be implemented now, before angry crowds grow from a nuisance to serious concern. It may take less than you might think. And in fact, the solutions to our housing crisis are already fairly clear. We need to increase the density of housing units. We need to use existing technology to shorten travel times and break the land limits. There is a way to solve complex social and economic problems without abandoning social responsibility. This is the Bay Area's opportunity to prove that it can innovate more than just technology.

36. San Francisco city government offered tax benefits to attract tech companies to establish operations in a less developed area.

37. The fast rise in the prices of land and houses increases the economic inequality among people.

38. San Francisco has been found to have the biggest income gap in California between the rich and the poor.

39. The higher rate of employment, combined with limited housing supply, did not make it any easier to buy a bouse.

40. When people compare their own living standard with others', it has a greater impact on their sense of contentment.

41. Improved transport networks connecting the city to distant outlying areas will also help solve the housing crisis.

42. Average incomes in the Bay Area make it virtually impossible for most tenant families to buy a home.

43. Innovative solutions to social and economic problems should be introduced before it is too late.

44. Residents of the San Francisco Bay Area strongly resent the tech industry because of the economic inequality it has contributed to.

45. One way to deal with the housing crisis is for the government to simplify approval procedures for housing projects.

Section C

Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B). C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

Passage One

Questions 46 to 50 are based on the following passage.

The suggestion that people should ai m for dietary diversity by trying to eat a variety of foods has been a basic public health recommendation for decades in the United States and elsewhere. Now, however, experts are warning that aiming for a diverse diet may actually lead to just eating more calories, and, thus, to obesity. One issue is that people may not interpret“variety” the way nutritionists intend. This problem is highlighted by new research conducted by the American Heart Association. Researchers reviewed all the evidence published related to dietary diversity and saw a correlation between dietary diversity and a greater intake of both healthy and unhealthy foods. This had implications for obesity, as researchers found a greater prevalence of obesity amongst people with a greater dietary diversity.

One author of the new study explained that their findings contradict standard dietary advice, as most dietary guidelines around the world include a statement of eating a variety of foods. But this advice does not seem to be supported by science, possibly because there is little agreement about the meaning of“dietary diversity,” which is not clearly and consistently defined. Some experts measure dietary diversity by counting the number of food groups eaten, while others look at the distribution of calories across individual foods, and still others measure how different the foods eaten are from each other.

Although the findings of this new study contradict standard dietary advice, they do not come as a surprise to all of the researchers involved. Dr. Rao, one of the study authors, noted that, after 20 years of experience in the field of obesity, he has observed that people who have a regimented lifestyle and diet tend to be thinner and healthier than people with a wide variety of consumption. This anecdotal evidence matches the conclusions of the study, which found no evidence that dietary diversity promotes healthy body weight or optimal eating patterns, and limited evidence shows that eating a variety of foods is actually associated with consuming more calories, poor eating patterns and weight gain. Further, there is some evidence that a greater variety of food options in a single meal may delay people's feeling of fullness and actually increase how much they eat.

Based on their findings, the researchers endorse a diet consisting of a limited number of healthy foods such as vegetables, fruits, grains, and poultry. They also recommend that people simultaneously endeavor to restrict consumption of sweets, sugar and red meat. The researchers stress, however, that their dietary recommendations do not imply dietary diversity is never positive, and that, in the past, diversity in diets of whole, unprocessed food may have actually been very beneficial.

46. What has been a standard piece of dietary advice for decades?

A) People should diversify what they eat.

B) People should have a well-balanced diet.

C) People should cultivate a healthy eating habit.

D) People should limit calorie intake to avoid obesity.

47. What did the new research by the American Heart Association find?

A) Unhealthy food makes people gain weight more easily.

B) Dietary diversity is positively related to good health.

C) People seeking dietary diversity tend to eat more.

D) Big eaters are more likely to become overweight.

48. What could help to explain the contradiction between the new findings and the common public health recommendation?

A) There is little consensus on the definition of dietary diversity.

B) The methods researchers use to measure nutrition vary greatly.

C) Conventional wisdom about diet is seldom supported by science.

D) Most dietary guidelines around the world contradict one another.

49. What did Dr. Rao find after 20 years of research on obesity?

A) There is no clear definition of optimal eating patterns.

B) Diversified food intake may not contribute to health.

C) Eating patterns and weight gain go hand in hand.

D) Dietary diversity promotes healthy body weight.

50. What does the passage say about people who eat a great variety of food?

A) They are more likely to eat foods beneficial to their health.

B) They don't have any problems getting sufficient nutrition.

C) They don't feel they have had enough until they overeat.

D) They tend to consume more sweets, sugar and red meat.

Passage Two

Questions 51 to 55 are based on the following passage.

The ability to make inferences from same and different, once thought to be unique to humans, is viewed as a cornerstone of abstract intelligent thought. A new study, however, has shown that what psychologists call same- different discrimination is present in creatures generally seen as unintelligent: newborn ducklings(小鴨).

The study, published Thursday in Science, challenges our idea of what it means to have a birdbrain, said Edward Wasserman, an experimental psychologist at the University of Iow a who wrote an independent review of the study.

“In fact, birds are extremely intelligent and our problem pretty much lies in figuring out how to get them to‘talk’ to us, or tell us how smart they really are,” he said.

Antone Martinho and Alex Kacelnik, co-authors of the new paper, devised a clever experiment to better test bird intelligence.

First, they took 1-day-old ducklings and exposed them to a pair of moving objects. The two objects were either the same or different in shape or color. Then they exposed each duckling to two entirely new pairs of moving objects.

The researchers found that about 70% of the ducklings preferred to move toward the pair of objects that had the same shape or color relationship as the first objects they saw. A duckling that was first shown two green spheres, in other words, was more likely to move toward a pair of blue spheres than a mismatched pair of orange and purple spheres.

Ducklings go through a rapid learning process called imprinting shortly after birth— it's what allows them to identify and follow their mothers.

These findings suggest that ducklings use abstract relationships between sensory inputs like color, shape, sounds and odor to recognize their mothers, said Dr. Kacelnik.

By studying imprinting, the authors of this study have shown for the first time that an animal can learn relationships between concepts without training, said Jeffrey Katz, an experimental psychologist at Auburn University who was not involved in the study.

Previous studies have suggested that other animals, including pigeons, dolphins, honeybees and some primates(靈長類動物), can discern same from different, but only after extensive training.

Adding ducklings to the list— particularly untrained newborn ducklings— suggests that the ability to compare abstract concepts“is far more necessary to a wider variety of animals’ survival than we previously thought,” Dr. Martinho said. He believes the ability is so crucial because it helps animals consider context when identifying objects in their environment.

It's clear from this study and others like it that“animals process and appreciate far more of the intricacies in their world than we' ve ever understood,” Dr. Wasserman said. “We are in a revolutionary phase in terms of our ability to understand the minds of other animals.”

51. In what way were humans thought to be unique?

A) Being capable of same-different discrimination.

B) Being able to distinguish abstract from concrete.

C) Being a major source of animal intelligence.

D) Being the cornerstone of the creative world.

52. What do we learn from the study published in Science?

A) Our understanding of the bird world was biased.

B) Our communication with birds was far from adequate.

C) Our knowledge about bird psychology needs updating.

D) Our conception of birds' intelligence was wrong.

53. What did the researchers discover about most ducklings from their experiment?

A) They could associate shape with color. 

B) They could tell whether the objects were the same.

C) They preferred colored objects to colorless ones.

D) They reacted quickly to moving objects.

54. What was novel about the experiment in the study reported in Science?

A) The ducklings were compared with other animals.

B) It was conducted by experimental psychologists.

C) The animals used received no training.

D) It used a number of colors and shapes.

55. What do we learn from Dr. Wasserman's comment on the study of animal minds at the end of the passage?

A) Research methods are being updated.

B) It is getting more and more intricate.

C) It is attracting more public attention.

D) Remarkable progress is being made.

26. K) scenario(n.設(shè)想, 可能的情況; 場景)

語義判斷:“我們?nèi)祟悓缱约骸笔且环N設(shè)想,由此可知,此處是說,“更可能的情況是??”,將備選名詞代入原文, 可知scenario符合語境。

27. G) extinction(n.滅絕)

語義判斷:首段提及人類可能會從地球上消失,還有可能毀滅自己,由此可知,此處應(yīng)指“人類滅絕的風(fēng)險”, 故extinction符合語境。

28. L) severely( adv.嚴重地; 嚴厲地)

語義判斷:由worse still(更糟糕的是)可知, 此處提出一種更糟糕的情況, 將備選副詞severely、shrewdly分別代入原文,severely符合語境,即“被社會嚴重低估”。

29. H) obscure( adj.鮮為人知的; 復(fù)雜難懂的; 難處理的)

語義判斷:前一句提及,這些生存風(fēng)險中,有些是眾所周知的,尤其是自然風(fēng)險。根據(jù)But可知,此處所填單詞語義應(yīng)與“眾所周知”相反,故obscure符合語境。

30. B) arise[ vi.(由······)產(chǎn)生, 引起; 出現(xiàn)]

語義判斷:此處意為“由人類技術(shù)引起的生存風(fēng)險”。arise from為固定短語,意為“由······引起,起因于??”, 符合語境。

31. J) posed [v.造成(威脅、問題或困難); 提出(問題)]

語義判斷:結(jié)合上一題的解析,上一段提及人類技術(shù)引起的生存風(fēng)險,由此可判斷,此處呼應(yīng)上文,指的是“技術(shù)進步給人類帶來的風(fēng)險”,pose risks to sb.為固定搭配,意為“給某人帶來風(fēng)險”,故空格處應(yīng)填入posed。

32. A) advocate(n.倡導(dǎo)者 v.提倡, 倡導(dǎo))

語義判斷:上一句提及,盡管博斯特羅姆擔心技術(shù)進步給人類帶來的風(fēng)險,但他并不是科技進步的反對者。本句由In fact開始,是對前面內(nèi)容“但他并不是科技進步的反對者”的進一步闡釋。因此,本句承接上文指出,事實上,他是超人類主義的長期_____。將備選名詞代入原文,可知advocate符合語境。

33. I) particular( adj.特別的, 特殊的)

語義判斷:空格前面的mathematics和后面的probability theory(概率論) 是總一分關(guān)系, 或者說一般和具體的關(guān)系,概率論屬于數(shù)學(xué)的范疇,是數(shù)學(xué)的一個分支。因此可判斷,此處是說“在他的著作中,博斯特羅姆運用了哲學(xué)和數(shù)學(xué)工具,特別是概率論,試圖確定??”,in particular為固定短語,意為“尤其,特別是”。

34. N) species(n.物種)

語義判斷:這里的we指的是我們?nèi)祟悾祟悓儆凇拔锓N”之一,故species符合語境,即“試圖確定我們作為一個物種如何才能獲得這一安全通行許可”。

35. D) encounter( vt.遇到; 邂逅)

語義判斷:此處是說,接下來是我與博斯特羅姆的對話,講述了人類在未來幾十年和幾個世紀可能會遇到的一些最有趣和最令人擔憂的生存風(fēng)險,顯然,encounter符合語境。

36. D。由題干關(guān)鍵信息government offered tax benefits和 attract tech companies to establish operations定位到D段。該段第二句指出,由市長埃德·李推動的政策為科技公寓提供了稅收優(yōu)惠,以便在該市長期被忽視的中市場街地區(qū)創(chuàng)業(yè)。由此可見,題干是對原文的同義轉(zhuǎn)述。題干中的offered tax benefits對應(yīng)原文中的provided tax breaks; 題干中的establish operations對應(yīng)原文中的set up shop; 題干中的less developed area對應(yīng)原文中的long-neglected Mid-Market area。

37.G。由題干關(guān)鍵信息fast rise in the prices of land and houses和economic inequality定位到G段。該段最后兩句指出,研究一直表明,土地的價值已經(jīng)超過了整體收入增長??當房價飆升到超出大多數(shù)家庭的承受能力時,貧富差距就會急劇擴大。由此可見,題干是對原文的同義轉(zhuǎn)述。題干中的The fastrise對應(yīng)原文中的soar(猛增; 飛漲) ; 題干中的economic inequality among people對應(yīng)原文中的the gap between the rich and the poor; 題干中的increases是文中原詞。

38.C。由題干關(guān)鍵信息have the biggest income gap in California定位到C段。該段首句指出, 根據(jù)近期的一項研究,舊金山的經(jīng)濟差距在加利福尼亞州排名第一。由此可見,題干是對原文的同義轉(zhuǎn)述。題干中的have the biggest income gap in California對應(yīng)原文中的ranks first in California for economic difference。

39.E。由題干關(guān)鍵信息higher rate of employment、limited housing supply和did not make it any easier定位到E段。該段首句指出,盡管如此,最近就業(yè)增長的勢頭,加上長久以來限制城市和整個半島住房開發(fā)的政策,并沒有幫助緩解住宅負擔能力危機。由此可見,題干是對原文的同義轉(zhuǎn)述。題干中的 higher rate of employment對應(yīng)原文中的job growth; 題干中的did not make it any easier to buy a house對應(yīng)原文中的did not help ease the affordability crisis。

40.H。由題干關(guān)鍵信息compare their own living standard with others'定位到H段。該段第五句指出, 這意味著,一個人如何將自己的生活保障與鄰居的生活保障進行比較,比他們的客觀生活水平對他們的幸福影響更大。由此可見, 題干是對原文的同義轉(zhuǎn)述。題干中的has a greater impact on their sense of contentment對應(yīng)原文中的has more of an impact on their happiness; 題干中的living standard對應(yīng)原文中的 standard of living。

41.K。由題干關(guān)鍵信息Improved transport networks和connecting the city to distant outlying areas定位到K段。該段前兩句指出,當然,僅靠房地產(chǎn)并不能解決問題。交通也需要升級,基礎(chǔ)設(shè)施也需要擴建,把偏遠地區(qū)與硅谷和這座城市連接起來。由此可見,題干是對原文的同義轉(zhuǎn)述。題干中的Improved對應(yīng)原文中的updated; 題干中的connecting對應(yīng)原文中的link; 題干中的distant outlying areas對應(yīng)原文中的distant regions。

42. F。由題干關(guān)鍵信息virtually impossible和most tenant families定位到F段。該段第二句指出, 考慮到目前該市的平均家庭收入藥為8萬美元,毫不夸張地說,如今絕大多數(shù)租房者都無法實現(xiàn)擁有住房的夢想。由此可見, 題干是對原文的同義轉(zhuǎn)述。題干中的virtually impossible對應(yīng)原文中的beyond the grasp;題干中的most tenant families對應(yīng)原文中的the vast majority of today's people who rent; 題干中的buy a home對應(yīng)原文中的home ownership。

43. M。由題干關(guān)鍵信息should be introduced before it is too late定位到M段。該段第二句指出, 但在憤怒的人群從一件麻煩事發(fā)展成需要認真關(guān)注的問題之前,需要立即實施解決方案。由此可見,題干是對原文的同義轉(zhuǎn)述。題干中的before it is too late對應(yīng)原文中的before angry crowds grow from nuisance to serious concern。

44. B。由題干關(guān)鍵信息Residents和strongly resent定位到B段。該段首句指出, 雖然大多數(shù)城市的居民都對當?shù)氐漠a(chǎn)業(yè)表示自豪和支持,但舊金山灣區(qū)嚴重的市場扭曲已經(jīng)在該地區(qū)引發(fā)了對科技產(chǎn)業(yè)的強烈不滿。由此可見, 題干是對原文的同義轉(zhuǎn)述。題干中的strongly resent對應(yīng)原文中的boiling resentment。

45. J。由題干關(guān)鍵信息government和simplify approval procedures定位到J段。該段最后兩句指出, 地方政府也需要援助開發(fā),這意味著提高整個地區(qū)的住房密度,并在簡化審批流程的同時把房子往高了建。由此可見, 題干是對原文的同義轉(zhuǎn)述。題干中的simplify approval procedures對應(yīng)原文中的 streamlining the approval process, 其中streamline意為“使(系統(tǒng)、機構(gòu)等)效率更高”。

46.根據(jù)題干信息詞dietary advice for decades可將答案線索定位至第一段第一句。

第一段第一句指出,幾十年來,在美國和其他地方,人們應(yīng)該通過設(shè)法吃多種食物來力求實現(xiàn)飲食多樣性,這種說法一直是一項基本的公共健康建議。由此可知A項正確,題干中的for decades原詞復(fù)現(xiàn),dietary advice是對原文中的public health recommendation的同義轉(zhuǎn)述。

47.根據(jù)題干信息詞research by the American Heart Association可將答案線索定位至第一段第四句。

第一段第四句提及美國心臟協(xié)會的新研究,隨后在下文具體介紹新發(fā)現(xiàn),即飲食多樣化與攝入更多的健康和不健康食品之間存在關(guān)聯(lián)性,由此可知C項正確。

48.根據(jù)題干信息詞contradiction、findings和 common public health recommendation可將答案線索定位至第二段第一句, common public health recommendation是對原文中的standard dietary advice的同義替換。

第二段第一句指出,這項新研究的一位作者解釋說,他們的發(fā)現(xiàn)與標準的飲食建議相矛盾,因為世界各地的大多數(shù)飲食指南都包括攝入多種食物的說法。隨后解釋矛盾的原因:但是這種建議似乎沒有科學(xué)支持,可能是因為對“飲食多樣化”的含義沒有什么一致的看法,它沒有明確和一致的定義。因此A項正確。

49.根據(jù)題干信息詞Dr. Rao和20 years of research on obesity可將答案線索定位至第三段第二句。

第三段第二句提及,在肥胖領(lǐng)域有20年的研究經(jīng)驗后,他(拉奧博士)觀察到,生活方式和飲食嚴格控制的人往往比吃的種類多的人更瘦、更健康。由此可知B項正確。

50. 根據(jù)題干信息詞eat a great variety of food可將答案線索定位至第三段最后一句。

第三段最后一句提及,此外,有一些證據(jù)表明,在一餐中有更多的食物選擇可能會推遲人們的飽腹感,實際上會增加他們的食量, C項是對該句的同義轉(zhuǎn)述。C項中的don't feel they have had enough同義替換原文的delay people's feeling of fullness, overeal同義替換原文中的increase how much they eat。

51. 根據(jù)題干信息詞humans和unique可將答案線索定位于第一段。

首段首句便出現(xiàn)了題干關(guān)鍵詞humans和unique,該句提到,從相同和不同的事物中做出推論的能力被視為抽象智慧思維的基石,這一能力曾經(jīng)被認為是人類獨有的。簡言之,辨別相同和不同的能力曾經(jīng)被認為是人類獨一無二的能力,由此可知選項A為正確答案。

52.根據(jù)題干信息詞Science可將答案線索定位于第二段。

第二段主要闡述了實驗心理學(xué)家愛德華·沃瑟曼對這項研究的評論,他認為發(fā)表在《科學(xué)》雜志上的研究挑戰(zhàn)了我們對擁有鳥腦意味著什么的看法;接著下文具體闡述了這項研究是如何測試鳥類智力的,得出的結(jié)論是,通常被視為不聰明的小鴨在沒有經(jīng)過訓(xùn)練的情況下能夠辨別“相同”和“不同”的移動物體。所以,我們之前認為鳥類不聰明的觀念是錯誤的。故選項D表述正確。

53. 根據(jù)題干信息詞ducklings和their experiment可將答案線索定位于第五段和第六段。

第五段和第六段具體介紹了安東尼·馬丁尼奧和亞歷克斯·卡塞爾尼克設(shè)計的實驗。第五段詳述了實驗的過程,第六段闡述了實驗的結(jié)果,即大多數(shù)小鴨更喜歡朝著與它們第一次看到的物體一樣,有相同的形狀或顏色的關(guān)系的那對物體移動。很顯然,小鴨能分辨出哪一對移動的物體具有相同的形狀或相同的顏色,故選項B為正確答案。

54.根據(jù)題干信息詞novel about the experiment可將答案線索定位于第九段。

第九段提到,實驗心理學(xué)家杰弗里·卡茨表示,這項研究首次表明動物可以在沒有經(jīng)過訓(xùn)練的情況下學(xué)習(xí)概念之間的關(guān)系。接著第十段提到,先前的研究表明,其他一些動物只有經(jīng)過大量的訓(xùn)練,才能分辨出相同和不同。這兩部分內(nèi)容前后對比,指出這項實驗與先前研究相比的新奇之處,即使用的小鴨沒有接受過訓(xùn)練,故選項C正確。

55.根據(jù)題干信息詞Dr. Wasserman、animal minds和 at the end of the passage可將答案線索定位于最后一段。

最后一段最后一句提到,就我們理解其他動物的思維的能力而言,我們正處于一個變革的階段。也就是說,我們關(guān)于動物思維能力的研究正在取得進步,故選項D正確。

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