大學(xué)英語(yǔ)六級(jí)考試真題

時(shí)間：2024-10-11 17:15:19 資格考試我要投稿

相關(guān)推薦

　　六級(jí)考生們，此刻站在真題的戰(zhàn)場(chǎng)前。這是一場(chǎng)對(duì)知識(shí)與能力的考驗(yàn)，更是自我超越的契機(jī)。真題如挑戰(zhàn)的山峰，等你攀登。鼓足勇氣，激發(fā)潛能，讓每一個(gè)答案都閃耀智慧光芒。用實(shí)力證明，你能征服六級(jí)，鑄就輝煌，加油！

大學(xué)英語(yǔ)六級(jí)考試真題

　　2024年6月英語(yǔ)六級(jí)作文試題題目

　　六級(jí)作文1

　　數(shù)字技術(shù)篇

　　There isa growing awarenessof the importance of digital lit-eracy and skills in todays world.Some believe that digitalliteracy is the key to success,while others argue that it is notcompulsory for everyone to learn.Personally,I find theformer view more reasonable.

　　Firstly,digitat literacy is crucial for students in todays world.It enables students to develop critical thinking and prob-lem-solving skills,preparing them for future careers in atechnology-driven society.Secondly,digital skills are essen-tial for success in the modern workplace.Employers increas-ingly require employees who can utilize technology tostreamlineprocesses,analyze data,and solve problems.Forinstance,the ability to use software applications such as Mi-crosoft Office or data analysis tools like Excel can greatly en-hance ones productivity and employability.Lastly,digital lit-eracy is invaluable in daily life.From managing personalfinances online to accessing information and services,digi-tal skills are essential for navigating the digitalworld.

　　In conclusion,digital literacy and skills are of paramount im-portance in todays world.As technology continues toevolve,it is crucial that we invest in developing digital litera-cy skillsto navigate and thrive in the digital age.

　　六級(jí)作文2

　　社會(huì)實(shí)踐和學(xué)習(xí)同樣重要

　　There is a growing awareness of the equal importance ofsocial practice and academic learning in todays world.Some believe that social practice is thekey to success,whileothers arguethat it is not compulsory for everyone toengage in.Personally,I find the former view morereason-able.

　　Firstly,social practice is essential for students.It allows themto apply what they have learned in the classroom to real-lifescenarios,enhancing their understanding and reinforcingtheir knowledge.For example,participating in internships orvolunteer work can provide students with valuable insightsinto their chosen field and help them develop practical skillsthat cannot be learned from textbooks.Secondly,in theworkplace,employers value individuals who can effectivelycollaborate,communicate,and adapt to different situations.Lastly,in daily life,social practice enables individuals to in-teract effectively with others,resolve conflicts,and make in-formed decisions.

　　In conclusion,social practice and academic learning are ofequal importance in todays world.By recognizing and em-bracing the value of both,we can foster a society thatvaluesknowledge,practical skills,and social responsibility.

　　2024年6月英語(yǔ)六級(jí)聽力試題及答案

　　六級(jí)聽力第一套

　　Conversation one.

　　ive just bought a new blender.

　　Whats that a blender?

　　A machine that blends food.

　　the electric kitchen appliance, exactly.

　　This one is state of the art. Ive been meaning to buy one for a while. I did thorough research on which specific model to get. I read through maybe hundreds of online user reviews. Anyway.

　　its amazing really what could be so special about it. I its just a blender.

　　Basically its just a very good one. It feels heavy and sturdy and well made. It also has lots of power and can easily cut and crush practically anything. This way. The soups and juices I make come out really fine and smooth with no lumpy bits.

　　I see I have never thought of getting one myself. It sounds like the kind of thing that for me personally I would rarely use.

　　Ive never had one before now that I do, I use it all the time. I make a fresh fruit juice in the morning, maybe not every morning but 3 or 4 times a week and it feels fantastic. Its a really healthy habit.

　　I can imagine that must feel quite satisfying. I can picture you getting all creative in the kitchen and trying out a multitude of different ingredients. Its obviously going to be healthier than buying packaged juice from a supermarket.

　　Its so much healthier. Its not even close did you know that store bought juice is like 10% sugar, right?

　　Then you bought it for the health benefits, mostly yes.

　　Basically, it allows me to have a more varied diet with a far wider assortment of nutrients, because its not only fruit in my morning juices. You see. I can also throw in vegetables, nuts, yogurt, cereals, anything that tickled my fancy.

　　Questions. 1 to 4 are based on the conversation you have just heard.

　　Question 1, what does the man say he did before buying the blender?

　　Question 2, what does the woman say she has never thought of doing?

　　Question 3, what does the man say is a really healthy habit?

　　Question 4, what do we learn about store bought juice from the conversation two?

　　Today we have a very interesting guest, mister thomas benjamin grimm, the mayor of burkington is here to talk about his job and responsibilities overseeing this charming village. Mr. Grimm, thank you for being here.

　　Thank you for having me.

　　Id like to start by stating the obvious burketon has become one of the most popular tourist destinations in the country and this has happened under your watch. Just how did you achieve this?

　　The achievements belongs to all the residents of burton. It was a shared effort where everybody pitched in for the communal good.

　　But how did this change happen? In about 10 years, burkton has gone from a relatively unheard of sleepy village to a must see destination.

　　Yes, the change has truly been remarkable. Burkton was always fortunate to be endowed with such a beautiful natural allure. The anbury hills above the village remain untouched by human development. The sonora valley just below it is equally stunning. The transformation commenced in a town hall meeting in spring 2008 over 10 years ago. Now when an overwhelming majority of neighbors voted in favor of motion, 836, this legislative proposal essentially set out to harmonize the aesthetic appearance of all the houses in berkton. The idea was that if all the properties looked a certain way with shared design features, then the village as a whole would look more beautiful. It worked, it certainly did.

　　Im looking now at a before and after photo and the change is truly remarkable. Its hard to believe its the same place. How do the neighbours feel now? Great pride.

　　I would say.

　　But what about the multitudes of visitors now crowding the streets? Is everyone happy about that?

　　The tourists we receive are a blessing as they have completely revitalized our local economy. Every visitor is warmly welcome.

　　Questions 5 to 8 are based on the conversation you have just heard.

　　Question 5, what is the question the woman asked mister grimm after the introduction?

　　Question 6, what do we learn about burkton of 10 years ago?

　　Question 7, what resulted from the passing of the legislative proposal motion 836.

　　Question 8, why does the man say the tourists are a blessing to bergen? Passage one,

　　researchers in the us have created a remote controlled robot that is so small. It can walk on the top of aus penny in research published in the journal science, robotics. A team at northwestern university said the crab like robot is 0.5 millimeters wide. Researchers described it as the smallest ever remote controlled walking robot. The tiny robot can bend, twist, crawl, walk, turn and even jump without the use of complex hardware or special power. The engineers said this is because the robot is powered by the elastic property of its body. To construct the robot, the researchers used a shape memory alloy material that transforms to its remembered shape when heated using a laser, the team is able to heat the robot at specific parts of its body, causing it to change shape as the robot deforms and goes back to its original shape. It creates movement from one place to another, because these structures are so tiny, the rate of cooling is very fast. Project lee, professor john a rogers said, in fact, reducing the sizes of these robots allows them to run faster. While the research is still in the exploratory phase, the team believes that technology could lead to micro sized robots that can perform practical tasks. In tightly confined spaces, you might imagine micro robots as agents to repair or assemble small structures or machines in industry or a surgical assistance to clear clogged arteries to stop internal bleeding or to eliminate cancerous tumors all in minimally invasive procedures. Rogers said.

　　Questions 9 to 11 are based on the passage you have just heard.

　　Question 9, what does the passage say about a team of researchers at northwestern university?

　　Question 10, what did the researchers say about the robot they created?

　　Question 11, what do the researchers expect their robots to do in the future?

　　Passage two, I dont want to boast or anything, but I have always considered myself something of an elite sleeper given the opportunity, I will sleep for marathon stretches and condose through the most extreme situations on one very rough ferry crossing on the route to the isles of silly. For example, my traveling companion spent the entire 3 hour ride throwing up in the bathroom while I dozed happily on a plastic chair. Unfortunately, it has come to my attention that I am not an elite sleeper. After all. It seems I am just lazy because elite sleepers are defined as the approximately 3% of the population who are biologically programmed to need less sleep than the rest of us. According to a study that came out in march, elite sleepers have rare genetic changes, which means they can sleep fewer hours than mere mortals without any risk of cognitive decline, it may not be possible to change your own genes, but can you train yourself to need less sleep? Is there a non biological way to reach elite sleeper status? I have spent the past year trying to answer that question, not for fun, I should add because having a baby has severely disrupted my sleep for which I still have a great passion for a while. I assumed id be forced to become one of those people who jump out of bed at the crack of dawn. After a year of tough scientific study, however, I have discovered being forced to get up early in the morning is very different from being an early bird.

　　Questions 12 to 15 are based on the passage you have just heard.

　　Question 12. What does the speaker say she did on her ride to the isles of silly

　　Question 13. What do we learn from the passage about elite sleepers?

　　Question 14, what has the speaker been trying to find out over the past year?

　　Question 15, what has the speaker discovered after a year of tough scientific study?

　　Recording one if you read an article about a controversial issue, do you think youd realize if it had changed your beliefs? No one knows your own mind like you do. It seems obvious that you would know if your beliefs had shifted. And yet a new paper in the quarterly journal of experimental psychology suggests that we actually have very poor awareness of our own belief change, meaning that we will tend to underestimate how much weve been swayed. By a convincing article, the researchers recruited over 200 undergraduates across two studies and focused on their beliefs about whether physical punishment of kids is an effective form of discipline. The students reported their initial beliefs about whether physical punishment is an effective way to discipline a child on a scale from one completely disbelief to nine completely believe. Several weeks later, they were given one of two research based text to read. Each was several pages long and either presented the arguments and data in favor of physical punishments or against it. After this, the students answered some questions to test their comprehension and memory of the text. Then the students again scored their belief in whether physical punishment is effective or not. Finally, the researchers asked them to recall what their belief had been at the start of the study. The students belief about physical punishment changed when they read a text that argued against their own initial position. Crucially, the memory of their initial belief was shifted in the direction of their new belief. In fact, their memory was closer to their current belief than their original belief. The more their belief had changed, the larger this memory bias tended to be suggesting the students were relying on their current belief to deduce their initial belief, the memory bias was unrelated to the measures of how well theyd understood or recalled the text, suggesting these factors didnt play a role in memory of initial belief or awareness of belief change. The researchers concede that this research was about changes to mostly moderate beliefs. Its likely the findings would be different in the context of changes to extreme or deeply held beliefs. However, our beliefs on most topics are in the moderate range. And as we go about our daily lives reading informative material, these intriguing findings suggest we are mostly ignorance of what we just read has updated and altered our own position. Questions.

　　16 to 18 are based on the recording you have just heard.

　　Question 16. What does a new paper in the quarterly journal of experimental psychology suggest?

　　Question 17, what happened when the students read a text that argued against their own initial position?

　　Question 18, what did the researchers concede concerning their findings according to as the american population grows?

　　So does the number of american moms recording to as the american population grows? So does the number of american moms, but more than a century after mothers day became an official holiday. Even as that number increases, the share of the american population who are mothers is at the lowest point in 1/4 century. Its frequently noted that fertility rates are falling sharply in richer countries, but the less observed consequence of this trend is that a decline in births can also mean a decline in motherhood in general. According to my analysis of data from the census bureau, the decline of american motherhood is real occurring very quickly and may continue for some time yet. Not only are moms making up less of the population, but their characteristics are changing too. And in a way that might be linked to their proportional decline, moms today tend to be older than in the past. Just looking at recent years, the change in age specific birth rates has been drastic. In just the past few years, the peak childbearing age range for american women has advanced from that of 25 to 29 that To 34. Meanwhile childbearing among women under 20 has fallen by half or more. While childbearing among women 35 and older is rising. One positive consequence of this age shift is that a larger proportion of new mothers are economically prepared to raise children less positively. However, many women find that as they age, they cant have as many kids as they would like. Plus having children later in life can increase the risk of health complications. These finer points aside, one major consequence of the older moms trend is that fewer years of a womans life are spent as a mother. This means that at any given time, a larger share of women and thus of the whole population will report not having children in government surveys. In other words, later motherhood means less motherhood, even as motherhood rates decline, mothers day will endure. In fact, despite the demographic shift, retail spending on the holiday appears to be rising. It is hard to say if mothers day spending is rising more than one would expect, given that the american population keeps growing. But one factor might be that the proportion of women who are the mothers of adult children is rising. Those adult children may spend more generously when it comes to celebrating the moms. They no longer live with.

　　Questions, 19 to 21 are based on the recording. You have just heard.

　　Question 19. What does the speaker conclude from her analysis of the census bureaus data?

　　Question 20. What does the speaker say is a positive consequence of the age shift in childbearing?

　　Question 21. What might be one explanation for the rise in retail spending on mothers day?

　　Recording three. Since nasa published a paper in 1989, claiming that house plants can soak up pollution and toxic chemicals, businesses and homeowners have increasingly invested in greenery to help clean their air. But a new analysis suggests it could actually take more than 1,000 plants per square meter to gain a benefit any greater than simply opening a couple of windows. The problem lies in the fact that NASA conducted their tests in sealed containers that do not simulate the conditions in most peoples homes or offices. The space agency was primarily concerned about keeping the air fresh for astronauts cut off in biosphere or space stations and helping to combat sick building syndrome, which had become a problem due to the super insulated and energy efficient officers of the late 1970s. By the early 1980s, workers regularly complained of skin rashes, sleepiness, headaches and allergies as they breathed in toxic chemicals from paints and plastics. Nasa found that certain plants could remove chemicals from the air. And even today, garden centers recommend the plants for air cleaning properties. However, a new evaluation of dozens of studies spanning 30 years found that house plants in a normal environment have little impact. In fact, natural ventilation is far better at cleaning the air. The researchers also calculated the clean air delivery rates for plants in the studies they analyzed and found that the rate at which plants dispersed the compounds was well below the usual rates of air exchange in a normal building caused by the movements of people coming and going opening doors and windows. Many of the studies did show a reduction in the concentration of volatile organic compounds over time, which is likely why people have seized on them to praise the air purifying virtues of plants. But the researchers calculation showed it would take 10 to 1,000 plants per square meter of floor space to compete with the air cleaning capacity of a buildings, air handling system, or even just a couple of open windows in a house. In contrast, NASA sealed experiment recommended one pot plants per 100 square feet. This is certainly an example of how scientific findings can be misleading or misinterpreted over time. But its also a great example of how scientific research should continually re examine and question findings to get closer to the ground truth of understanding whats actually happening.

　　Questions 22 to 25 are based on the recording. You have just heard question 22. What does nas as 1989 paper? Claim house plants can do.

　　Question 23. What is said to be the problem with nas as study reported in its 1989 paper?

　　Question 24. What is the finding of a new evaluation of dozens of studies spanning 30 years?

　　Question 25. What does NASA sealed experiment recommendation exemplify in scientists pursuit of truth?

　　六級(jí)聽力第二套

　　After you hear a question，you must choose the best answer from the four choices，mark abc and d then mark the corresponding letter on answer sheet one with a single line through the sensor。Conversation one。

　　Thank you for meeting with me，steven at such short notice。

　　not a problem，margaret。Now please give me some good news。Have you agreed to my last proposal？

　　I have indeed and I wish to sign the agreement pending one small change to be made to the contract。

　　Margaret，we have been through this for almost a year now back and forth making alterations。Are you sure you want to make a sponsorship deal for your clients or not？I ask this because frankly，some people at my end are running out of patience。I understand your concerns。

　　but as im sure you understand，we hold our clients best interests to be of the utmost concern。We therefore comb through the fine details of all contracts。Rest assured we all appreciate your firms patience。

　　Fine。So what changes do you wish to make？

　　Essentially，we would like the new deal to exclude the middle east。

　　Thats all the middle east。

　　Why my client has a couple of other perspective marketing deals from companies in the middle east。Those offers should they materialize would exclusively employ my clients image in the middle east only。Therefore，in order to avoid any conflict，we would need to ensure that both marketing campaigns do not overlap geographically。

　　What business sector in the middle east are we talking about here？

　　Real estate.

　　that should be okay then so long as the product is very different from our food and beverage market，there should be no conflict of interest。Nevertheless，I will have to run this through my people。I dont foresee any problem though，the middle east is a negligible market for us，but I still need to check this with a couple of departments。

　　Questions 1to4 are based on the conversation you have just heard。

　　Question 1，what does the woman say she will do？

　　Question 2，what does the man say about some people he represents？

　　Question 3，what reason does the woman give for the new deal to exclude the middle east？

　　Question 4，what does the man say about the middle east？

　　Next，we have a special science related news story。Paula hancock is at the denver observatory。Paula，what is the big story over there？Hi.john.All the astronomers on site here are very excited。In fact，space enthusiasts all across north america and the rest of the northern hemisphere will be congregated on mountain tops tonight to watch the night sky。

　　Whats the big event？Is there an eclipse happening soon？

　　Tonight the earth will come into close proximity with the oppenheimer comet。It is the closest our planet has been to such a phenomenon in over 100years。For this reason。It is expected that thousands of people will gaze up at the sky tonight in order to see this formidable object。

　　How far away is this common？Will people be able to see it with the naked eye？

　　The oppenheimer comet will still be millions of miles away on the edge of our galaxy。But nevertheless，this is a relatively close distance，close enough for people to observe in good detail through a telescope。People will only see a blur without one。However that does not mean one needs professional equipment。Even the most ordinary of telescopes should be conducive for people to observe and wonder at this flying object。

　　Many of our viewers will be wondering how they too can take part in this once in a lifetime event。Where will this comment be in the sky？How can people find it？

　　The comet will be almost exactly due north at60°above the equator。However，finding the comet is indeed very tricky and scientists here have told me there are plenty of phone apps that will facilitate this。

　　How fantastic？Thank you，paula for the information。

　　Questions 5to8 are based on the conversation you have just heard。Question five，what does the woman say about all the astronomers at the denver observatory？

　　Question 6，what do we learn from the conversation about the oppenheimer comment？

　　Question 7，what does the woman say？People will only see in the sky without a telescope？

　　Question 8，what do scientists at the denver observatory advise amateurs do to facilitate their observation。

　　single line through the center。Passage one，

　　dietary guidelines form the basis for nutrition advice and regulations around the world。While there is strong scientific consensus around most existing guidelines。One question has recently stirred debate。Should consumers be warned to avoid ultra processed foods？Two papers published today in the american journal of clinical nutrition outline the case for and against using the concept of ultra processed foods to help inform dietary guidelines beyond conventional food classification systems。The authors，carlos monteiro of the university of sao paulo and arna ostrich of novo nordisk foundation。Well discuss the issue in a live virtual debate。August14th，during nutrition，2024live online。The debate centers around a system developed by monteiro and colleagues that classifies foods by their degree of industrial processing，ranging from unprocessed to ultra processed。The system defines ultra processed foods as those made using sequences of processes that extract substances from foods and alter them with chemicals。In order to formulate the final product，ultra processed foods are characteristically designed to be cheap，tasty and convenient。Examples include soft drinks and candy，package snacks and pastries，ready to heat products and reconstituted meat products。Studies have linked consumption of ultra processed foods which are often high in salt，sugar and fat weight gain and an increased risk of chronic diseases，even after adjusting for the amount of salt，sugar and fat in the diet，while the mechanisms behind these associations are not fully understood，montero argues that the existing evidence is sufficient to justify discouraging consumption of ultra processed foods in dietary recommendations and government policies。

　　Questions 9to11 are based on the passage you have just heard。

　　Question 9，what question is said to have recently stirred debate？

　　Question 10，how does the system developed by montero and colleagues classify foods？

　　Question 11，what is consumption of ultra processed foods linked with according to studies passage two，believe it or not？

　　Human creativity benefits from constraints。According to psychologists，when you have less to work with，you actually begin to see the world differently。It constraints。You dedicate your mental energy acting more resourcefully when challenged you figure out new ways to be better the most successful creative people know that constraints give their minds the impetus to leap higher。People who invent new products are not limited by what they dont have or cant do。They leverage their limitations to push themselves even further。Many products and services are created because the founders saw a limitation in what they use。They created innovation based on what was not working for them at the moment。Innovation is a creative persons response to limitation in a 2015study which examined how thinking about scarcity or abundance influences how creatively people use their resources。Ravi matter at the university of illinois and meng zhu at johns hopkins university found that people simply have no incentive to use whats available to them in novel ways。When people face scarcity，they give themselves the freedom to use resources in less conventional ways because they have to obstacles can broaden your perception and open up your thinking processes，consistent constraints，help you improve at connecting unrelated ideas and concepts。Marissa meyer，former vice president for search products and user experience at google。Once wrote in a publication on bloomberg constraints，shape and focus problems and provide clear challenges to overcome。Creativity thrives best and constraint。

　　Questions 12to15 are based on the passage you have just heard。

　　Question12，what do psychologists say？People do when they are short of resources，

　　question13，what does the passage say about innovation？

　　Question14.What did a 2015 study by ravi mehta and meng zhu find?

　　question15.What did marissa meyer once write concerning creativity with a single line through the center？

　　Recording one different people use different strategies for managing conflicts。These strategies are learned in childhood。Usually we are not aware of how we act in conflict situations。We just do whatever seems to come naturally，but we do have a personal strategy and because it is learned，we can always change it by learning new and more effective ways of managing conflicts。When you get involved in a conflict，there are two major concerns you have to take into account，achieving your personal goals and keeping a good relationship with the other person，how important your personal goals are， how important the relationship is to you affect how you act in a conflict。Given these two concerns，five styles of managing conflicts can be identified when the turtle turtles withdraw into their shells to avoid conflicts。They give up their personal goals and relationships。They believe it is easier to withdraw from a conflict than to face it。Two，the shark sharks try to overpower opponents by forcing them to accept their solution to the conflict they seek to achieve their goals at all costs。Sharks assume that conflicts are settled by one person winning and one person losing。Winning gives sharks a sense of pride and achievement losing gives them a sense of weakness，inadequacy and failure。Three，the teddy bear。Teddy bears want to be accepted and liked by other people。They think that conflict should be avoided in favor of harmony and believe that conflicts cannot be discussed without damaging relationships。They give up their goals to preserve the relationship for the fox foxes are moderately concerned with their own goals and about their relationships，with other people。They give up part of their goals and persuade the other person in a conflict to give up part of his goals。They seek a solution to conflicts where both sides gain something5，the owl owls view conflicts as problems to be solved。They see conflicts as improving relationships by reducing tension between two people。They try to begin a discussion that identifies the conflict as a problem by seeking solutions that satisfy both themselves and the other person。Owls maintain the relationship。Owls are not satisfied until a solution is found that achieves their own goals and the other persons goals。And they are not satisfied until the tensions and negative feelings have been fully resolved。

　　Questions 16to18 are based on the recording you have just heard。

　　Question 16。Why does the speaker say strategies for managing conflicts can always be changed？

　　Question 17，what is said to affect the way one acts in a conflict？

　　Question 18 of the five styles the speaker discusses which views conflicts as problems to be solved?

　　Recording two，the genetic code of all1.5million known species of animals and plants living on earth will be mapped to help save species from extinction and boost human health。Scientists hope that cracking the genetic code of plants and animals could help uncover new treatments for infectious diseases。Slow aging improve crops in agriculture create new bio materials in britain，organizations including the natural history museum，the royal botanic gardens，a queue and the welcome sanger institute have joined forces to sequence britains 66,000 species of animals and plants dubbed the darwin tree of life project。It is expected to take 10 years and cost￡100 million once completed。All the information will be publicly available to researchers。Many scientists believe that earth has now entered the 6th mass extinction with humans creating a toxic mix of habitat loss，pollution and climate change，which has already led to the loss of at least 77 species of mammals and 140 types of birds。Since1500，it is the biggest loss of species since the dinosaurs were wiped out 66 million years ago。Scientists say that sequencing every species will revolutionize the understanding of biology and evolution，bolster efforts to conserve as well as protect and restore biodiversity。Doctor tim littlewood，head of life sciences department at the natural history museum said whether you are interested in food or disease，the history of how every organism on the planet has adapted to its environment is recorded in its genetic makeup，how you then harness that is dependent on your ability to understand it。We will be using modern methods to get a really good window on the present and the past。And course，a window on the past gives you a prospective model on the future。Sir jim smith，director of science at welcome said，try as I I cant think of a more exciting，more relevant，more timely or more internationally inspirational project。Since1970，humanity has wiped out60%of animal populations about 23,000of80,000 species surveyed are approaching extinction。We are in the midst of the 6th great extinction events of life on our planet which not only threatens wildlife species，but also imperils the global food supply。As scientists，we all realise we desperately need to catalogue life on a fragile planet。Now I think were making history。

　　Questions19to21 are based on the recording you have just heard

　　question 19.what do scientists hope to do by cracking the genetic code of plants and animals？

　　Question 20，what do many scientists believe with regard to earth？

　　2024年6月英語(yǔ)六級(jí)試題及答案完整版（第一套）

　　六級(jí)聽力第一套——