医学考博2019年真题

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Vocabulary：
Section A
31. According to the Geneva ______no prisoners of war shall be subject to abuse.
A. Customs          B. Congresses     C. Conventions     D. Routines
32. Environmental officials insist that something be done to ______acid rain.
A. curb             B. sue            C. detoxify        D. condemn
33. It is impossible to say how it will take place, because it will happen______, and it will not be a long process.                                             
A. spontaneously                   B. simultaneously                     
C. principally                     D. approximately                       
34. Diabetes is one of the most______ and potentially dangerous disease in the world.                                                                    
A. crucial         B. virulent    C. colossal          D. prevalent      
35. Rheumatologist advises that those with ongoing aches and pains first seek medical help to ______the problem.
A. affiliate          B. alleviate        C. aggravate          D. accelerate
36. How is it possible that such______ deception has come to take place right under our noses?
A. obvious        B. significant    C. necessary         D. widespread
37. Now a paper in Science argues that organic chemicals in the rock come mostly from ______on earth rather than bacteria on Mars.
A. configuration   B. constitution      C. condemnation    D. contamination
38. Chronic high-dose intake of vitamin A has been shown to have ______effects on bones.
A. adverse      B. prevalent  C. instant          D. purposeful
39.  Generally, vaccine makers _____ the virus in fertilized chicken eggs in a process that can take four to six months.
A. penetrate         B. designate      C. generate       D. exaggerate
40. We are much quicker to respond, and we respond far too quickly by giving ______ to our anger.
A. vent         B. impulse      C. temper       D. offence
Section B
41.  The patient's condition has worsened since last night.
A. improved      B. returned         C. deteriorated      D. changed
42.  Beijing Television-Station Transmitting Tower really looks magnificent at night when it’s lit up.
A. decorated      B. illustrated     C. illuminated     D. entertained
43.  Attempts to restrict parking in the city centre have further aggravated the problem of traffic congestion.
A. ameliorated   B. aggregated   C. deteriorated   D. duplicated
44.  The applications of genetic engineering are abundant and choosing one appropriate for this case can be rather difficult.
A. sufficient        B. plentiful        C. adequate            D. countable
45.  The defect occurs in the first eight weeks of pregnancy, though no one understands why.
A. deficit       B. deviation        C. draw back       D. discrepancy
46.  He has been on hormone alternate therapy for four years and looks fantastic.
A. successor        B. replacement      C. surrogate           D. choice
47.  It had over 2,000 apartment complexes, a great market, a large number of industrial workshops, an administrative center, a number of massive religious edifices, and a regular grid pattern of streets and buildings.
A. ancient                      B. carefully
C. very large                          D. carefully protected
48.  When patients spend extended periods in hospital, they tend to become overly dependent and lose interest in taking care of themselves.
A. extremely        B. exclusively    C. exactly         D. explicitly
49.  The anxious parent was vigilant over the injured child in spite of a full array of emergency room of doctors and nurses.
A. preoccupied   B. unwary           C. watchful            D. dozing
50.  The doctor vacillated so frequently on disease-prevention techniques that his colleagues accused him of inconsistency.
A. wavered         B. instigated     C. experimented     D. relied
Cloze
We spend a lot of time looking at the eyes of others for social   51  —it helps us understand a person’ emotions, and make decisions about how to respond to them. We also know that adults avoid eye contact when anxious. But researchers have known far  52  about eye gazing patterns in children.
According to new research by Kalina Michalska, assistant professor of psychology at the University of California, Riverside, we now, know that anxious children tend to avoid making eye contact, and this has consequences for how they experience fear. The  53  and less frequently they look at the eyes of others, the more likely they are to be afraid of them, even when there may be no reason to be. Her study, “Anxiety Symptoms and Children's Eye Gaze During Fear Leaming”, was published in the journal The Journal of Child Psychology and Psychiatry.
"Looking at someone’s eyes helps us understand whether a person is feeling sad, angry, fearful, or surprised. As adults, we then make decisions about how to respond and what to do next. But, we know much less about eye patterns in children—so, understanding those patterns can help us learn more about the development of social learning,” Michalska said.
Michalska and the team of researchers showed 82 children, 9 to 13 years old, images of two women’s faces on a computer screen. The computer was equipped with an eye tracking device that allowed them to measure  54  on the screen children were looking, and for how long. The participants were originally shown each of the two women a total of four times. Next, one of the images was  55  with a loud scream and a fearful expression, and the other one was not. At the end, children saw both faces again without any sound or scream.
The following three conclusions can be drawn from the study:
1. All children spent more time looking at the eyes of a face that was paired with the loud scream than the face that was not paired with the scream, 56  they pay attention to potential threats even in the absence of outward cues.
2. Children who were more anxious avoided eye contact during all three phases of the experiment, for both kinds of faces. This had consequences for how afraid they were of the faces.
3. The more children avoided eye contact；the more afraid they were 57  the faces.     
The conclusions suggest that children spend more time looking at the eyes of a face when previously paired with something frightening suggesting they pay more attention to potentially threatening information as a way to learn more about the situation and plan what to do next.
However, anxious children tend to avoid making eye contact, which leads to greater  58  experience. Even though avoiding eye contact may reduce anxiety     59  , the study finds that—over time—children may be missing out  60_ important social information. This includes that a person may no longer be threatening or scary, and yet the child continues feeling fearful of that person.
51. A. environment   B. cues          C. relations      D. answers
52. A. less          B. more          C. enough       D. beyond
53. A. longer        B. more anxious   C. shorter        D. more
54. A. where        B. when          C. how         D. what
55. A. followed      B. recorded       C. paired        D. marked
56. A. suggest       B. suggesting     C. suggests       D. being suggested
57. A. to            B. of            C.at            D. about
58. A. fear          B. surprise        C. sad          D. angry
59. A. in the long run             B. for a long time
C. in the short time              D. in a long time
60. A. with          B. without        C. of          D. on
Reading Comprehension
Passage One
The British psychoanalyst John Bowlby maintains that separation from the parents during the sensitive “attachment” period from birth to three may scar a child’s personality and predispose to emotional problems in later life.
Some people have drawn the conclusion from Bowlby' s work that children should not be subjected to day care before the age of three because of the parental separation it entails, and many people do believe this. It has been argued that an infant under three who is cared for outside the home may suffer because of the separation from his parents. But there are also arguments against such a strong conclusion.         
But traditional societies are so different from modem societies that comparisons based on just one factor are hard to interpret. Firstly, anthropologists point out that the insulated love affair between children and parents found in modem societies does not usually exist in traditional societies. For example, in some tribal societies, such as the Ngoni, the father and mother of a child did not rear their infant alone—far from it.
Certainty, Bowlby’s analysis raises the possibilities that early day care had delayed effects. The possibility that such care might lead to, say, more mental illness or crime 15 or 20 years later can only explored by the use of statistics. However, statistical studies of this kind have not yet been carried out, and even if they were, the results would certainly be complicated and controversial. Secondly, common sense tells us that day care would not be so widespread today if parents, care-takers found children had problems with it. Thirdly, in the last decade, there have been a number of careful American studies of children in day care, and they have uniformly reported that care had a neutral or slightly positive effect on children’s development.
Whatever the long-term effects, parents sometimes find the immediate effects difficult to deal with. Children under three are likely to protest at leaving their parents and show unhappiness. At the age of three or three and a half almost all children find the transition to nursery easy，and this is undoubtedly why more and more parents make use of child care at this time. The matter, then, is far from clear-cut, though experience and available evidence indicate early care is reasonable for infants.
61. According to the passage, the consequence of parental separation________.
A. still needs more statistical studies
B. has been found negative is more serious
C. is obvious
D. in modem times
62. The author thinks that John Bowlby’s concern___________.
A. is relevant and justifiable
B. is too strong to Relieve
C. is utterly groundless
D. has something that deserve our attention
63. What’s the result of American studies of children in day care in the last decade?
A. The children’s unhappiness and protest was due to the day care the children received.
B. The bad effects of parental separation were hard to deal with.
C. The effect of day care was not necessarily negative on children’s development.
D. Early care was reasonable for babies since it’s practiced by so many people nowadays.
64. According to the passage, which of the following is probably a reason for parents to send their children under three to day care?
A. They don’t know about day care’s negative effect.
B. They are too busy to care for their children.
C. They want their children to be independent as early as possible.
D. They want to facilitate their children to adapt to nursery at the age of about three.
65. What’s the author’s attitude to people who have drawn the conclusion from Bowlby’s work that children should not be subjected to day care before the age of three?
A. He supports most of their belief because Bowlby's proposition is well-grounded.
B. He is sympathetic for them, for he thinks they have been misled by Bowlby.
C. He doesn't totally agree with them, since the long-term effect of day care still needs further study.
D. He doesn't quite understand them, as they are contradictory in themselves.
Passage Two
By the end of this century, the average world temperature is expected to increase between one and four degrees, with widespread effects on rainfall, sea levels and animal habitats. But in the Arctic, where the effects of climate change are most intense, the rise in temperature could be twice as much.
Understanding how Arctic warming will affect the people, animals, plant and marine life and economic activity in Canada’s North are important to the country's future, says Kent Moore, an atmospheric physicist at University of Toronto Mississauga who is participating in a long-term, international study of the marine ecosystem along the Beaufort Sea, from Alaska to the Mackenzie delta.
The study will add to our knowledge of everything from the extent of sea ice in the region to how fish stocks will change to which areas could become targets for oil and gas exploration to the impact on the indigenous people who call this part of the country home.
Moore, who has worked in the Arctic for more than 20 years, says his research has
already found that thinning sea ice and changes in wind patterns are causing an important change in the marine food chain: phytoplankton（淳游植物）is blooming two to three weeks earlier. Many animals time their annual migration to the Arctic for when food is plentiful, and have not adapted to the earlier bloom. " ' Animals' behavior can evolve over a long time, but these climate changes are happening in the space of a decade, rather than hundreds of years, ” says Moore, " Animals can't change their behavior that quickly. ”
A warmer Arctic is expected to have important effects on human activity in the region, as the Northwest Passage becomes navigable during the summer, and resource extraction becomes more feasible. Information gained from the study will help government, industry and communities make decisions about resource management, economic development and environmental protection.
Moore says the study—which involves Canadian, American and European researchers and government agencies will also use a novel technology to gather atmospheric data: remotely piloted drones. "The drones have the capability of a large research aircraft，and they’re easier to deploy,” he says, showing the researchers to gather information on a more regular basis than they would be able to with piloted aircraft.
66. By the end of this century, according to the author, global warming will ______.
A. start to bring about extreme weather events to humans and animals
B. increase the average world temperature by four degrees
C. cause more damages to the whole world than expected
D. affect the Arctic more than any other parts of the earth
67.To help understand the destructive mechanism of Arctic warming, as indicated by the passage, the international study ______.              
A. is conducted with every single discipline of University of Toronto
B. pioneers in pursuing the widespread effects of climate change
C. involves so many countries for different investigations
D.is intended to deal with various aspects in research
68. When he ways, “Animals can’t change their behavior that quickly,” what does Moore mean by that quickly?
A. The migration of the animals to the Arctic.
B. The widespread effects of global warming.
C. The rate of the climate change in the Arctic.
D.The phytoplankton within the marine ecosystem.
69. According to the author, to carry out proper human activities in the Arctic______.
A. becomes more difficult than ever before
B. is likely to build a novel economy in the region
C. will surely lower the average world temperature
D. needs the research-based supporting information
70. With the drones deployed, as Moore predicts, the researchers will _______.
A. involve more collaborating countries than they do now
B. get more data to be required for their research
C. use more novel technologies in research
D. conduct their research at a regular basis
Passage Three
Having too much caffeine during pregnancy may impair baby’s liver development and increase the risk of liver disease in adulthood, according to a study published in the Journal of Endocrinology. Pregnant rats given caffeine had offspring with lower birth weights, altered growth and stress hormone levels and impaired liver development. The study findings indicate that consumption of caffeine equivalent to 2-3 cups of coffee may alter stress and growth hormone levels in a manner that can impair growth and development, and increase the risk of liver disease in adulthood.
Previous studies have indicated that prenatal caffeine intake of 300 mg/day or more in women, which is approximately 2 to 3 cups coffee per day, can result in lower birth weights of their children. Animal studies have further suggested that prenatal caffeine consumption may have more detrimental long-term effects on liver development with an increased susceptibility to non-alcoholic fatty liver disease, a debilitating condition normally associated with obesity and diabetes. However, the underlying link between prenatal caffeine exposure and impaired liver development remains poorly understood. A better understanding of how caffeine mediates these effects could help prevent these health issues in people in the future.
In this study, Prof Hui Wang and colleagues at Wuhan University in China, investigated the effects of low (equivalent to 2-3 cups of coffee) and high dose (equivalent of 6-9 cups of coffee) caffeine, given to pregnant rats, on liver function and hormone levels of their offspring. Offspring exposed to prenatal caffeine had lower levels of the liver hormone, insulin like growth factor (IGF-1), and higher levels of the stress hormone, corticosteroid at birth. However, liver development after birth showed a compensatory 'catch up' phase, characterised by increased levels of IGF-1, which is important for growth.
Dr. Yinxian Wen, study co-author, says, “Our results indicate that prenatal caffeine causes an excess of stress hormone activity in the mother, which inhibits IGF-1 activity for liver development before birth. However, compensatory mechanisms do occur after birth to accelerate growth and restore normal liver function, as IGF-1 activity increases and stress hormone signalling decreases. The increased risk of fatty liver disease caused by prenatal caffeine exposure is most likely a consequence of this enhanced, compensatory postnatal IGF-1 activity. ”
These findings not only confirm that prenatal caffeine exposure leads to lower birth weight and impaired liver development before birth but also expand our current understanding of the hormonal changes underlying these changes and suggest the potential mechanism for increased risk of liver disease in the future. However, these animal findings need to be confirmed in humans.
Dr. Wen comments, "Our work suggests that prenatal caffeine is not good for babies and although these findings still need to be confirmed in people, I would recommend that women avoid caffeine during pregnancy."
71. Which of the following is NOT the problem of baby rats of pregnant rats given caffeine?
A. Lower birth weight.                  B. Smaller stress.
C. Liver development problem.           D. Growth problem.
72. If a pregnant woman takes 3 cups of coffee, what will probably happen?
A. Her weight will get lower and lower.
B. The weight of her baby will get lower and lower.
C. She will suffer from non-alcoholic fatty liver disease in a long run.
D. Her baby will be more vulnerable to obesity and diabetes because of liver problem.
73. Which of following is not correct according to the passage?
A. A better understanding of the relationship between caffeine and effects has been achieved.
B. 4-5 cups of coffee could be categorized as medium-dose intake.
C. Liver development problem may be remedied after birth by increased growth factor.
D. The study is mainly conducted on the rats instead of human.
74. What is the relationship between stress hormone and liver development when taking in prenatal caffeine?
A. Lower stress hormone, lower birth weight before birth.
B. Higher stress hormone, lower growth hormone before birth.
C. Higher stress hormone, more accelerated growth of weight after birth.
D. Lower stress hormone, less accelerated growth of liver after birth.
75. What can be the best summary of the last paragraph?
A. The research hasn’t been done on humans so pregnant women can ignore the results.
B. The compensatory mechanism for liver growth makes prenatal caffeine intake safe.     C. Experts suggest pregnant women should still avoid caffeine.
D. We have known enough about the hormone changes underlying the health
Passage Four
The bizarre antics of sleepwalkers have puzzled police, perplexed scientists, and fascinated writers for centuries. There is an endless supply of stories about sleepwalkers. Persons have been said to climb on steep roofs, solve mathematical problems, compose music, walk through plate-glass windows, and commit murder in their sleep
How many of these stories have a basis in fact, and how many are pure fakery? No one knows, but if some of the most sensational stories should be taken with a barrel of salt, others are a matter of record.
In Revere, Massachusetts, a hundred policemen combed a waterfront neighborhood for a lost boy who left his home in his sleep and woke up five hours later on a strange sofa in a strange living room, with no idea how he had got there.
There is an early medical record of a somnambulist who wrote a novel in his sleep. And the great French writer Voltaire knew a sleepwalker who once got out of bed, dressed himself, made a polite bow, danced a minuet, and then undressed and went back to bed.
At the University of Iowa, a student was reported to have the habit of getting up in the middle of the night and walking three-quarters of a mile to the Iowa River. He would take a swim and then go back to his room to bed.
The world's champion sleepwalker was supposed to have been an Indian, Pandit Ramrakha, who walked sixteen miles along a dangerous road without realizing that he had left his bed. Second in line for the title is probably either a Vienna housewife or a British farmer. The woman did all her shopping on busy streets in her sleep. The farmer, in his sleep, visited a veterinarian miles away.
The leading expert on sleep in America claims that he has never seen a sleepwalker. He is Dr. Nathaniel Kleitman, a physiologist at the University of Chicago. He is said to know more about sleep than any other living man, and during the last thirty-five years had lost a lot of sleep watching people sleep. Says he, "Of course, I know that there are sleepwalkers because I have read about them in the newspapers. But none of my sleepers ever walked, and if I were to advertise for sleepwalkers for an experiment, I doubt that I'd get many takers."
Sleepwalking, nevertheless, is a scientific reality. Like hypnosis, it is one of those dramatic, eerie, awe-inspiring phenomena that sometimes border on the fantastic. It lends itself to controversy and misconceptions, what is certain about sleepwalking is that it is a symptom of emotional disturbance, and that the only way to cure it is to remove the worries and anxieties that cause it. Doctors say that somnambulism is much more common than is generally supposed. Some have estimated that there are four million somnambulists in the United States. Others set the figure even higher. Many sleepwalkers do not seek help and so are never put on record, which means that an accurate count can never be made.
The simplest explanation of sleepwalking is that it is the acting out of a vivid dream. The dream usually comes from guilt, worry, nervousness, or some other emotional conflict. The classic sleepwalker is Shakespeare’s Lady Macbeth. Her nightly wanderings were caused by her guilty conscience at having committed murder. Shakespeare said of her, “The eyes are open but their sense is shut.”
The age-old question is: Is the sleepwalker actually awake or asleep. Scientists have decided that he is about half-and-half. Like Lady Macbeth, he has weighty problems on his mind. Dr. Zeida Teplitz, who made a ten-year study of the subject, says, “Some people stay awake all night worrying about their problems. The sleepwalker thrashes them out in his sleep. He is awake in the muscular area, partially asleep in the sensory area." In other words, a person can walk in his sleep, move around, and do other things, but he does not think about what he is doing.
76. The second sentence in the second paragraph means that_________.
A. no one knows, but certainly all the sleep walking stories have something incredible
B. the sleepwalking stories are like salt adding flavor to people’s life
C. sleepwalking stories that are most fantastic should be sorted out from ordinary stories
D. the most fantastic sleepwalking stories may be just fictions, yet there are still truthfully recorded stories
77. ________was supposed to be the world's champion sleepwalker.
A. The student habitually walked to the Iowa River and swam in his sleep
B. The man danced a minuet in his sleep
C. The man walker sixteen miles along a dangerous road
D. The boy walked five hours in his sleep
78. Sleepwalking is the result of ______ according to the passage.
A. emotional disorder                B. a vivid dream
C. lack of sleep and great anxiety       D. insanity
79. Dr. Zeida Teplitz seemed to_________.
A. agree that sleepwalking sometimes leads to dangerous acts
B. conclude that sleepwalkers are awake in their sensory area
C. disagree with the belief that sleep walkers are immune to injury
D. think that sleepwalking can turn into madness
80. The writer makes it obvious that_________.
A. sleepwalkers are often awakened by dangers
B. most sleepwalkers can find ways to avoid self-injury
C. it is important to find out the underlying cause of sleepwalking
D. sleepwalking is actually a kind of hypnosis
Passage Five
Beyond the basic animal instincts to seek food and avoid pain, Freud identified two sources of psychic energy, which he called "drives”: aggression and libido. The key to his theory is that these were unconscious drives, shaping our behavior without the mediation of our waking minds; they surface, heavily disguised, only in our dreams. The work of the past half-century in psychology and neuroscience has been to downplay the role of unconscious universal drives, focusing instead on rational processes in conscious life. But researchers have found evidence that Freud s drives really do exist, and they have their roots in the limbic system, a primitive part of the brain that operates mostly below the horizon of consciousness. Now more commonly referred to as emotions, the modem suite of drives comprises five: rage, panic, separation distress, lust and a variation on libido sometimes called seeking.
The seeking drive is proving a particularly fruitful subject for researchers. Although like the others it originates in the limbic system, it also involves parts of the forebrain, the seat of higher mental functions. In the 1980s, Jaak Panksepp, a neurobiologist at Bowling Green State University in Ohio, became interested in a place near the cortex known as the ventraltegmental area, which in humans lies just above the hairline. When Panksepp stimulated the corresponding region in a mouse, the animal would sniff the air and walk around, as though it were looking for something. Was it hungry? No. The mouse would walk right by a plate of food, or for that matter any other object Panksepp could think of. This brain tissue seemed to cause a general desire for something new. “What I was seeing,” he says, “was the urge to do stuff. ” Panksepp called this seeking.
To neuropsychologist Mark Solms of University College in London, that sounds very much like libido. “Freud needed some sort of general, appetitive desire to seek pleasure in the world of objects,” says Solms. "Panksepp discovered as a neuroscientist what Freud discovered psychologically.” Solms studied the same region of the brain for his work on dreams. Since the 1970s, neurologists have known that dreaming takes place during a particular form of sleep known as REM—rapid eye movement—which is associated with a primitive part of the brain known as the pons. Accordingly, they regarded dreaming as a low-level phenomenon of no great psychological interest. When Solms looked into it, though, it turned out that the key structure involved in dreaming was actually the ventral tegmental, the same structure that Panksepp had identified as the seat of the “seeking”emotion. Dreams, it seemed, originate with the libido—which is just what Freud had believed.
Freud's psychological map may have been flawed in many ways, but it also happens to be the most coherent and, from the standpoint of individual experience, meaningful theory of the mind. “Freud should be placed in the same category as Darwin, who lived before the discovery of genes,” says Panksepp. “Freud gave us a vision of a mental apparatus. We need to talk about it, develop it, test it.” Perhaps it’s not a matter of proving Freud wrong or right, but of finishing the job.
81.  Freud believed that aggression and libido________
A. were the only two sources of psychic energy
B. could sometimes surface in our conscious life
C. affected our behavior unconsciously
D. could appear clearly on our dreams         
82. Which of the following terms is equivalent to what Freud called libido?
A.  Emotion.          B. Lust.           C. Seeking.          D. Urge.
83. Jaak Panksepp's study on a mouse proves that the seeking drive________.
A. originates in the limbic system
B. involves parts of the forebrain
C. controls how we respond to stimulus
D. exists in many, other animals
84. According to Mark Solms, dreaming_________.
A. takes place during the whole sleeping period
B. involves a primitive part of the brain known as the pons
C. originates in the forebrain
D. just takes place in a certain period
85. It can be inferred that Freud and Darwin are similar in that their theories____.
A. have long been discredited
B. provided good guide for further research
C. are placed in the same category
D. are concerned about human being
Passage Six
Scientists have a duty to talk to the public. Why? Because social policies need to be decided on the basis of rational grounds and facts. These include important issue ranging from climate change, to the goals of the space program, to the protection of endangered species, to the use of embryonic stem cells or animals in biomedical research. Both the public and policy makers need to understand not only the scientific justification for our work but also, in some cases, why we deem our studies to be morally justifiable.
The time is ripe for a more open, public and honest debate about the role of scientific experimentation in animals. What follows are some of my thoughts on this topic. I hope this perspective encourages other scientists to join the discussion and prompts opponents of animal research to create an atmosphere where civil discourse can take place, free of the threats, harassment and intimidation（恐吓）that are increasingly directed at biomedical scientists and their families.
Criticism to the use of animals in biomedical research rests on varied scientific and ethical arguments. One extreme view holds that information gathered from animal research cannot, even in principle, be used to improve human health. It is often accompanied by catchy slogan such as “If society funds mouse models of cancer, we will find more cures for cancer in mice.” It is argued that the physiology of animals and humans are too different to allow results from animal research to be extrapolated（推断）to humans.
Such a blanket statement is falsified by numerous cases where experimentation on animals has demonstrably contributed to medical breakthroughs. The experiments on cardiovascular and pulmonary function in animals that began with Harvey and continued with the Oxford physiologists established the understanding of what the heart and lungs do and how they do it, on which the modem practice of internal medicine rests. Modern medical practice is inconceivable in the absence of the insights gained from these experiments. Anticoagulants were first isolated in dogs: insulin was discovered in dogs and purified in rabbits; lung surfactants were first extracted and studied in dogs; rabbits were used in the development of in vitro fertilization; mice in the development of efficient breast cancer drugs and so on.
For the sake of completeness, it must be noted that the other extreme一the notion that all medical advances are a result of animal research―is false as well. Important medical advances, such as sanitation and the discovery of aspirin, were conducted without the use of animals.
86. The scientists need to talk to the public for the purpose of_________
A. disseminating the findings of their research
B. addressing a wider range of issues of the public concern
C. justifying their work both scientifically and morally
D. helping the public better understand their work
87. In the second paragraph, what topic is raised for discussion?
A. The atmosphere for civil discourse.
B. The role of scientific animal research.
C. The pressure on biomedical scientist.
D. The opposition of scientific animal research.
88. On which of the following do the opponents of the animal research base their extreme view?
A. The physiologic differences between animals and humans.
B. The catchy slogans used to oppose animal research.
C. The overuse of mice in cancer experimentation.
D. The inadequate funds in animal research.
89. To falsify the blanket statement, the author cites all the following EXCEPT ____.
A. isolation of anticoagulants in dogs
B. the purification of insulin in rabbits
C. the extraction and studies of lung surfactants in dog
D. the use of mice in the development of in virto fertilization
90. What message does the author try to convey about the scientific experimentation in animals?
A. It should be used with caution because of its possible false results.
B. It plays an irreplaceable part in biomedical science.
C. It can be replaced by other experimental models.
D. It plays a less important role than it used to.
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参考答案：
31-35: CAADB
36-40: ADACA
41-45: CCCBA
46-50: BCACA
51-55: BACDC
56-60: BBACD
61-65: ADCDC
66-70: DBADB
71-75: BDABC
76-80: DCACC
81-85: CCBCB
86-90: CBADB