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单选题
What have the scientists found?
A
Time goes by fast when we have nothing to do.
B
The ten minutes’ break is important to students.
C
The brain works in different ways in different situations.
参考答案
参考解析
解析：
细节理解题。根据文章第二段第一句可知：大脑根据我们事物投入的精力而改变工作方式。故选C项。
细节理解题。根据文章第二段第一句可知：大脑根据我们事物投入的精力而改变工作方式。故选C项。
更多 “单选题What have the scientists found?A Time goes by fast when we have nothing to do.B The ten minutes’ break is important to students.C The brain works in different ways in different situations.” 相关考题
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Medical scientists __________ finding a cure for cancer since 1960s.
A. have been working outB. have been workingC. have been working onD. have been building on
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The wish of the scientists is _________ new resources for mankind.
A. findB. to be foundC. to findD. found
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Many scientists have been probing psychological problems.A．solvingB．exploringC．settlingD．handling
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What was scientists' understanding of cryptic species?A．They occurred in equal numbers in all biogeographical regions.B．They were mostly found in insects and reptiles.C．They were likely to be in tropical rather than temperate regions.D．Both Ｂ and Ｃ.
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What can be inferred about intelligence testing from Paragraph 3？[A] People no longer use IQ scores as an indicator of intelligence.[B] More versions of IQ tests are now available on the Internet.[C] The test contents and formats for adults and children may be different.[D] Scientists have defined the important elements of human intelligence.
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The sharp hearing of a fish _______ by two scientists.
A.have been provedB.have provedC.has provedD.has been proved
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22． In a recent survey at one school，scientists found many students liked_________A． vegetablesB． unhealthy foodC． fruitsD． healthy food
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What can be inferred from the last paragraph?A.Babies’ cries have long been the concerns of scientists.
B.Babies start their speech acquisition at the age of three months.
C.Studying babies' cries helps us understand their speech perception.
D.Babies’ true speech, rather than their cries, should be the focus of study.
考题
Modern scientists divide the process of dying into two stages--clinical or temporary death and biological death. Clinical death occurs when the vital organs, such as the heart or lungs, have ceased to function, but have not suffered permanent damage. The organism can still be revived. Biological death occurs when changes in the organism lead to the disintegration of vital cells and tissues. Death is then irreversible and final.
Scientists have been seeking a way to prolong the period of clinical death so that the organism can be revived before biological death occurs. The best method developed so far involves cooling of the organism, combined with narcotic sleep. By slowing down the body's metabolism, cooling delays the processes leading to biological death.
To illustrate how this works, scientists performed an experiment on a six-year-old female monkey called Keta. The scientists put Keta to sleep with a narcotic. Then they surrounded her body with ice-bags and began checking her body temperature. When it had dropped to 28 degrees the scientists began draining blood from its body. The monkey's blood pressure decreased and an hour later both the heart and breathing stopped; clinical death set in. For twenty minutes Keta remained in this state. Her temperature dropped to 22 degrees. At this point the scientists pumped blood into its body in the direction of the heart and started artificial breathing. After two minutes the monkey's heart became active once more. After fifteen minutes, spontaneous breathing began, and after four hours Keta opened her eyes and lifted her head. After six hours, when the scientists tried to give her a penicillin injection, Keta seized the syringe and ran with it around the room. Her behavior differed little from that of a healthy animal.
The best statement of the main idea of this passage is that _____A.scientists have found a way to prolong the period of clinical death
B.biological death occurs when vital organs have suffered perumnent damage
C.modern scientists divide the process of dying into clinical and biological death
D.cooling delays the processes leading to biological death
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It is reported that some scientists in the United States have found a new __________for cancer.A.way
B.answer
C.approach
D.cure
考题
The best statement of the main idea of this passage is that__________.A.scientists have found a way to prolong the period of clinical death
B.biological death occurs when vital organs have suffered permanent damage
C.modern scientists divide the process of dying into clinical and biological death
D.cooling delays the processes leading to biological death
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共用题干
第三篇Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events一 flowering,the appearance of leaves and the first frog calls of the spring一all around the world.But ecologists can't be everywhere so they're turning to non-scientists,sometimes called citizen scientists,for help.Climate scientists are not present everywhere.Because there are so many places in the world and not enough scientists to observe all of them,they're asking for your help in observing signs of climate change across the world.The citizen scientist movement encourages ordinary people to observe a very specificresearch interest一birds,trees,flowers budding,etc.and send their observations to a giant database to be observed by professional scientists.This helps a small number of scientists track a large amount of data that they would never be able to gather on their own.Much like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live in.All that's needed to become one is a few minutes each day or each week to gather data and send them in.A group of scientists and educators launched an organization last year called the National Phenology Network."Phenology"is what scientists call the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists alike to collect data about plant flowering and leafing eveiy year.The program,called Project BudBurst,collects life cycle data on a variety of common plants from across the United States.People participating in the project一which is open to every- one一record their observations on the Project BudBurst website."People don't have to be plant experts一they just have to look around and see what's in their neighbor- hood,"says Jennifer Schwartz,an education consultant with the project."As we collect these data,we'll be able to make an estimate of how plants and communities of plants and animals will respond as the climatechanges."What are citizen scientists asked to do?A:To develop a specific research interest and become professional scientists.B:To send their research observations to a professional database.C:To increase their knowledge about climate change.D:To keep a record of their research observations.
考题
共用题干
第三篇Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events一 flowering,the appearance of leaves and the first frog calls of the spring一all around the world.But ecologists can't be everywhere so they're turning to non-scientists,sometimes called citizen scientists,for help.Climate scientists are not present everywhere.Because there are so many places in the world and not enough scientists to observe all of them,they're asking for your help in observing signs of climate change across the world.The citizen scientist movement encourages ordinary people to observe a very specificresearch interest一birds,trees,flowers budding,etc.and send their observations to a giant database to be observed by professional scientists.This helps a small number of scientists track a large amount of data that they would never be able to gather on their own.Much like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live in.All that's needed to become one is a few minutes each day or each week to gather data and send them in.A group of scientists and educators launched an organization last year called the National Phenology Network."Phenology"is what scientists call the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists alike to collect data about plant flowering and leafing eveiy year.The program,called Project BudBurst,collects life cycle data on a variety of common plants from across the United States.People participating in the project一which is open to every- one一record their observations on the Project BudBurst website."People don't have to be plant experts一they just have to look around and see what's in their neighbor- hood,"says Jennifer Schwartz,an education consultant with the project."As we collect these data,we'll be able to make an estimate of how plants and communities of plants and animals will respond as the climatechanges."What is the final purpose of Project BudBurst?A:To study when plants will have their first buds.B:To find out the types of plants in the neighborhood.C:To collect life cycle data on a variety of common plants from across the United States.D:To investigate how plants and animals will respond as the climate changes.
考题
The scientists have conducted a series of experiments.A:actions
B:tests
C:effects
D:technologies
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共用题干
Unlocking the Human Genome（基因组）1 A project to unlock secrets一what scientist could resist that challenge?This is what many scientists are doing as they work on the Human Genome Project.The aim of the project is to decode（破译）all of the some 100,000 genes in the human body. Scientists are using DNA fingerprinting techniques to do the decoding.2 DNA is the substance found in the chromosomes（染色体）of a cell. A chromosome is a chain of genes.Each gene carries a piece of genetic information.At any one moment in a cell, thousands of genes are turned on and off to produce proteins（蛋白质）.The challenge for scientists is to find out what role each gene plays in protein production.At some point this decoding will be complete.Then scientists will have a map of an ideal genome,or a picture of the total genetic nature of a human being.The ideal genome is called a consensus（交感）genome. Everything works well in a consensus genome.3 But no one in the world has a consensus genome.Everyone's genome is different from the ideal. These differences are referred to as genetic mutations（突变）.Genetic mutations in a person's genome mean that the person has a greater than average chance of suffering from health problems.Some problems are not life-threatening.These would include things like colorblindness,or mild headaches.Other problems are serious,such as heart disease,or cancer.4 It will take years to identify the role of each of the 100,000 genes.The short-term goal of the project is to find the physical and mental health problems a person is likely to encounter during his or her lifetime.The long-term goal is to have each person live a longer,healthier life.Paragraph 2_________A:How does DNA work?B:What is the Human Genome Project about?C:How are the DNA samples collected?D:What are the goals of the Human Genome Project?E:What is the role of each gene?F:What are the consequences of genetic mutations?
考题
共用题干
Unlocking the Human Genome（基因组）1 A project to unlock secrets一what scientist could resist that challenge?This is what many scientists are doing as they work on the Human Genome Project.The aim of the project is to decode（破译）all of the some 100,000 genes in the human body. Scientists are using DNA fingerprinting techniques to do the decoding.2 DNA is the substance found in the chromosomes（染色体）of a cell. A chromosome is a chain of genes.Each gene carries a piece of genetic information.At any one moment in a cell, thousands of genes are turned on and off to produce proteins（蛋白质）.The challenge for scientists is to find out what role each gene plays in protein production.At some point this decoding will be complete.Then scientists will have a map of an ideal genome,or a picture of the total genetic nature of a human being.The ideal genome is called a consensus（交感）genome. Everything works well in a consensus genome.3 But no one in the world has a consensus genome.Everyone's genome is different from the ideal. These differences are referred to as genetic mutations（突变）.Genetic mutations in a person's genome mean that the person has a greater than average chance of suffering from health problems.Some problems are not life-threatening.These would include things like colorblindness,or mild headaches.Other problems are serious,such as heart disease,or cancer.4 It will take years to identify the role of each of the 100,000 genes.The short-term goal of the project is to find the physical and mental health problems a person is likely to encounter during his or her lifetime.The long-term goal is to have each person live a longer,healthier life.Scientists are trying hard to discover_________of each of the genes in our body.A:that person's healthB:a scientific answerC:scientific researchersD:the genesE:the functionF:the size
考题
单选题What, according to the passage, makes the research conducted by the scientists at the Oregon Department of Health so unique?A
The fact that the scientists managed to measure the average hourly increase of NNK.B
The fact that the scientists succeeded in making more people realize the harm of smoking.C
The fact that the scientists did a lot of experiments on smokers in public areas.D
The fact that the scientists discovered NNK, a carcinogen in cigarette smoke.
考题
单选题Since many insects have already become（）to DDT, scientists have to look for some new insecticideA
activeB
resistantC
toughD
gradual
考题
单选题The scientists have absolute freedom as to what research they think it best to_______A
pursue B
devote C
adjust D
engage
考题
单选题What is the danger of the confusion in the meaning of science?A
With this confusion, people would have wrong political opinions.B
With this confusion, young people might get the wrong scientific training.C
It would lead to misconceptions in education.D
It would result in more scientists than really needed.
考题
单选题The anthropologists would have considered their research a success if they would have found a language that shares lexical elements with the Borneans they were studying.A
if they would have found a language that shares lexical elements with the Borneans they were studyingB
had they found a language that shares lexical elements with that of the Borneans they were studyingC
if they found a language that shares lexical elements with the Borneans they were studyingD
if they had found a language that shares lexical elements with the Borneans they were studyingE
if they would have found a language that shares lexical elements with that of the Borneans they were studying
考题
单选题Passage 2Several research teams have found that newborns prefer their mothers' voices over those of other people. Now a team of scientists has gone an intriguing step further: they have found that newborns cry in their native language."We have provided evidence that language begins with the very first cry melodies,"says Kathleen Wermke of the University of Wirzburg, Germany, who led the research."The dramatic finding of this study is that not only are newborns capable of producing different cry melodies, but they prefer to produce those melody patterns that are typical for the ambient language they have heard during their fetal life, within the last trimester,"said Wermke."Contraryto orthodox interpretations, these data support the importance of human infants' crying for seeding language development."It had been thought that babies' cries are constrained by their breathing patterns and respiratory apparatus, in which case a crying baby would sound like a crying baby no matter what the culture is, since babies are anatomically identical."The prevailing opinion used to be that newborns could not actively influence their production of sound,"says Wermke. This study refutes that claim: since babies cry in different languages, they must have some control(presumably unconscious) over what they sound like rather than being constrained by the acoustical properties of their lungs, throat, mouth, and larynx. If respiration alone dictated what a cry sounded like, all babies would cry with a falling-pitch pattern, since that's what happens as you run out of breath and air pressure on the throat's sound-making machinery decreases. French babies apparently didn't get that memo."German and French infants produce different types of cries, even though they share the same physiology,"the scientists point out."The French newborns produce ' nonphysiological' rising patterns,"showing that the sound of their cries is under their control.Although phonemes-speech sounds such as "ki"or"sh"-don't cross the abdominal barrier and reach the fetus, so-called prosodic characteristics of speech do. These are the variations in pitch, rhythm, and intensity that characterize each language. Just as newborns remember and prefer actualsongs that they heard in utero, it seems, so they remember and prefer both the sound of Mom's voice and the melodic signature of her language.The idea of the study wasn't to make the sound of a screaming baby more interesting to listeners-good luck with that-but to explore how babies acquire speech. That acquisition, it is now clear, begins months before birth, probably in the third trimester. Newborns "not only have memorized the main intonation patterns of their respective surrounding language but are also able to reproduce these patterns in their own [ sound] production,"conclude the scientists. Newborns'"cries are already tuned toward their native language", giving them a head start on sounding French or German (or, presumably, English or American or Chinese or anything else: the scientists are collecting cries from more languages). This is likely part of the explanation for how babies develop spoken language quickly and seemingly without effort. Sure, we may come into the world wired for language(thank you, Noam Chomsky), but we also benefit from the environmental exposure that tells us which language.Until this study, scientists thought that babies became capable of vocal imitation no earlier than12 weeks of age. That's when infants listening to an adult speaker producing vowels can parrot the sound. But that's the beginning of true speech. It's sort of amazing that it took this long for scientists to realize that if they want to see what sounds babies can perceive, remember, and play back, they should look at the sound babies produce best. So let the little angel cry: she's practicing to acquire language.What does Kathleen Wermke's research indicate?A
Babies are unable to do vocal imitation.B
Babies' cries could be their early language acquisition.C
Babies start speech acquisition months after their birth.D
A crying baby is a crying baby no matter what the culture is.
考题
单选题Passage 2Several research teams have found that newborns prefer their mothers' voices over those of other people. Now a team of scientists has gone an intriguing step further: they have found that newborns cry in their native language.We have provided evidence that language begins with the very first cry melodies,says Kathleen Wermke of the University of Wirzburg, Germany, who led the research.The dramatic finding of this study is that not only are newborns capable of producing different cry melodies, but they prefer to produce those melody patterns that are typical for the ambient language they have heard during their fetal life, within the last trimester,said Wermke.Contraryto orthodox interpretations, these data support the importance of human infants' crying for seeding language development.It had been thought that babies' cries are constrained by their breathing patterns and respiratory apparatus, in which case a crying baby would sound like a crying baby no matter what the culture is, since babies are anatomically identical.The prevailing opinion used to be that newborns could not actively influence their production of sound,says Wermke. This study refutes that claim: since babies cry in different languages, they must have some control(presumably unconscious) over what they sound like rather than being constrained by the acoustical properties of their lungs, throat, mouth, and larynx. If respiration alone dictated what a cry sounded like, all babies would cry with a falling-pitch pattern, since that's what happens as you run out of breath and air pressure on the throat's sound-making machinery decreases. French babies apparently didn't get that memo.German and French infants produce different types of cries, even though they share the same physiology,the scientists point out.The French newborns produce ' nonphysiological' rising patterns,showing that the sound of their cries is under their control.Although phonemes-speech sounds such as kiorsh-don't cross the abdominal barrier and reach the fetus, so-called prosodic characteristics of speech do. These are the variations in pitch, rhythm, and intensity that characterize each language. Just as newborns remember and prefer actualsongs that they heard in utero, it seems, so they remember and prefer both the sound of Mom's voice and the melodic signature of her language.The idea of the study wasn't to make the sound of a screaming baby more interesting to listeners-good luck with that-but to explore how babies acquire speech. That acquisition, it is now clear, begins months before birth, probably in the third trimester. Newborns not only have memorized the main intonation patterns of their respective surrounding language but are also able to reproduce these patterns in their own [ sound] production,conclude the scientists. Newborns'cries are already tuned toward their native language, giving them a head start on sounding French or German (or, presumably, English or American or Chinese or anything else: the scientists are collecting cries from more languages). This is likely part of the explanation for how babies develop spoken language quickly and seemingly without effort. Sure, we may come into the world wired for language(thank you, Noam Chomsky), but we also benefit from the environmental exposure that tells us which language.Until this study, scientists thought that babies became capable of vocal imitation no earlier than12 weeks of age. That's when infants listening to an adult speaker producing vowels can parrot the sound. But that's the beginning of true speech. It's sort of amazing that it took this long for scientists to realize that if they want to see what sounds babies can perceive, remember, and play back, they should look at the sound babies produce best. So let the little angel cry: she's practicing to acquire language.What can be inferred from the last paragraph？A
Babies'cries have long been the concerns of scientists.B
Babies start their speech acquisition at the age of three months.C
Studying babies'cries helps us understand their speech perception.D
Babies'true speech，rather than their cries，should be the focus of study.
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