英語(yǔ)六級(jí)真題的聽(tīng)力部分，作為衡量學(xué)生英語(yǔ)實(shí)際應(yīng)用能力的重要標(biāo)尺，涵蓋了短對(duì)話(huà)、長(zhǎng)對(duì)話(huà)及短文理解三大板塊，這些題型著重考察考生捕捉關(guān)鍵信息并深入理解語(yǔ)境的能力。因此，深入掌握并熟練運(yùn)用真題聽(tīng)力材料，對(duì)于提升六級(jí)考試成績(jī)具有舉足輕重的意義。此次，我們精心整理了2019年6月大學(xué)英語(yǔ)六級(jí)真題聽(tīng)力部分（卷一）的詳細(xì)內(nèi)容及答案解析，旨在為廣大考生提供寶貴的備考資源與參考！
Section A
Directions: In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A)，B)，C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.
Questions 1 to 4 are based on the conversation you have just heard.
1. A) A six- month-long negotiation.
B) Preparations for the party.
C) A project with a troublesome client.
D) Gift wrapping for the colleagues.
2. A) Take wedding photos.
B) Advertise her company.
C) Start a small business.
D) Throw a celebration party.
3. A) Hesitant.
B) Nervous.
C) Flattered.
D) Surprised.
4. A) Start her own bakery.
B) Improve her baking skill.
C) Share her cooking experience.
D) Prepare food for the wedding.
Questions 5 to 8 are based on the conversation you have just heard.
5. A) They have to spend more time studying.
B) They have to participate in club activities.
C) They have to be more responsible for what they do.
D) They have to choose a specific academic discipline.
6. A) Get ready for a career.
B) Make a lot of friends.
C) Set a long-term goal.
D) Behave like adults.
7. A) Those who share her academic interests.
B) Those who respect her student commitments.
C) Those who can help her when she is in need.
D) Those who go to the same clubs as she does.
8. A) Those helpful for tapping their potential.
B)Those conducive to improving their social skills.
C)Those helpful for cultivating individual interests.
D)Those conducive to their academic studies.
Section B
Directions:In this section, you will hear two passages. At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A)，B)，C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.
Questions 9 to 11 are based on the passage you have just heard.
9.A) They break away from traditional ways of thinking.
B) They are prepared to work harder than anyone else.
C) They are good at refining old formulas.
D) They bring their potential into full play.
10. A) They contributed to the popularity of skiing worldwide.
B) They resulted in a brandnew style of skiing techniques.
C) They promoted the scientific use of skiing poles.
D) They made explosive news in the sports world.
11. A) He was recognized as a genius in the world of sports.
B)He competed in all major skiing events in the world.
C)He won three gold medals in one Winter Olympics.
D)He broke three world skiing records in three years.
Questions 12 to 15 are based on the passage you have just heard.
12. A) They appear restless.
B) They lose consciousness.
C) They become upset.
D) They die almost instantly.
13. A) It has an instant effect on your body chemistry.
B)It keeps returning to you every now and then.
C)It leaves you with a long-lasting impression.
D)It contributes to the shaping of you mind.
14. A) To succeed while feeling irritated.
B) To feel happy without good health.
C) To be free from frustration and failure.
D) To enjoy good health while in dark moods.
15. A) They are closely connected.
B) They function in a similar way.
C) They are too complex to understand.
D) They reinforce each other constantly.
Section C
Directions: In this section, you will hear three recordings of lectures or talks followed by three or four questions. The recordings will be played only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.
Questions 16 to 18 are based on the recording you have just heard.
16. A) They differ in their appreciation of music.
B) They focus their attention on different things.
C) They finger the piano keys in different ways.
D) They choose different pieces of music to play.
17. A) They manage to cooperate well with their teammates.
B) They use effective tactics to defeat their competitors.
C) They try hard to meet the spectators’ expectations.
D) They attach great importance to high performance.
18. A) It marks a breakthrough in behavioral science.
B) It adopts a conventional approach to research.
C) It supports a piece of conventional wisdom.
D) It gives rise to controversy among experts.
Questions 19 to 21 are based on the recording you have just heard.
19. A) People’s envy of slim models.
B) People’s craze for good health.
C) The increasing range of fancy products.
D) The great variety of slimming products.
20. A) They appear vigorous.
B) They appear strange.
C) They look charming.
D) They look unhealthy.
21.A) Culture and upbringing.
B) Wealth and social status.
C) Peer pressure.
D) Media influence.
Questions 22 to 25 are based on the recording you have just heard.
22. A) The relation between hair and skin.
B) The growing interest in skin studies.
C) The color of human skin.
D) The need of skin protection.
23. A) The necessity to save energy.
B) Adaptation to the hot environment.
C) The need to breathe with ease.
D) Dramatic climate changes on earth.
24. A) Leaves and grass.
B) Man-made shelter.
C) Their skin coloring.
D) Hair on their skin.
25.A) Their genetic makeup began to change.
B) Their communities began to grow steadily.
C) Their children began to mix with each other.
D) Their pace of evolution began to quicken.
Section A
Conversation One
W: Hi, my name is Kathy. Nice to meet you!
M: Nice to meet you, too, Kathy. My name is John. I'm a university friend of the bride. What about you? Who do you know at this party?
W: I am a colleague of Brenda. I was a little surprised to be invited, to be honest.We've only been working together the last six months, but we quickly became good friends. We just wrapped up a project with a difficult client last week. I be t Brenda is glad it's done with, and she can focus on wedding preparations.
M: Oh, yes. So you're Kathy from the office. Actually, I've heard a lot about you and that project. The client sounded like a real nightmare!
W: Oh, he was. I mean we deal with all kinds of people on a regular basis. It's part of the job, but he was especially particular, enough about that. What line of work are you in?
M: Well, right out of college, I worked in advertising for a while. Recently, though, I turn my photography hobby into a small business.I'll actually be taking photos during the big event as a wedding gift.
W: That sounds wonderful and very thoughtful of you. I bake, just as a hobby. But Brenda has asked me to do the cake for the wedding.I was a bit nervous saying yes, because I'm far from a professional.
M: Did you bake the cookies here at the party tonight?
W: Yes, I got the idea from a magazine.
M: They're delicious! You've got nothing to worry about. You're a natural.
W: You really think so?
M: If you hadn't told me that, I would have guessed they were baked by the restaurant.You know, with your event-planning experience, you could very well open your own shop.
W: Ha, ha! One step at a time. First, I'll see how baking the wedding cake goes. If it's not a disaster, maybe I'll give it some more thought.
Questions 1 to 4 are based on the conversation you have just heard.
1. What did Kathy and Brenda finish doing last week?
2. What is John going to do for Brenda?
3. How did Kathy feel when asked to bake the cake?
4. What does the man suggest the woman do?
Conversation Two
M:You are heading for a completely different world now that you are about to graduate from high school.
W: I know it's the end of high school, but many of my classmates are going on to the same university and we are still required to study hard. So what's the difference?
M:Man y aspects are different here at university.The most important one is that you have to take more individual responsibility for your actions. It's up to your own self-discipline how much effort you put into study. Living in college dormitories, there are no parents to tell you to study harder or stop wasting time. Lecturers have hundreds of students, and they are not going to follow you up or question you if you miss their lectures.
W: Nobody cares, you mean?
M: It's not that nobody is concerne d about you.It's just that suddenly at university you are expected to behave like an adult. That means concentrating on the direction of your life in general and your own academic performance specifically.
W: For example?
M: Well, like you need to manage your daily, weekly and monthly schedules so that you will study regularly. Be sure to attend all classes and leave enough time to finish assignments and prepare well for examinations.
W: Okay, and what else is different?
M: Well, in college, there are lots of distractions and you need to control yourself.You will make interesting friends, but you need only keep the friends who respect your student commitments.Also,there are a lot of wonderful clubs, but you shouldn't allocate too much time to club activities, unless they are directly related to your study. It's also your choice if you want to go out at night, but you will be foolish to let that affect your class performance during the day.
W: Well, I'm determined to do well in university and I guess I am going to have to grow up fast.
Questions 5 to 8 are based on the conversation you have just heard.
5. What does the man say about college students as compared with high schoolers?
6. What are college students expected to do according to the man?
7. What kind of friends does the man suggest the woman make as a college student?
8. What kind of club activities should college students engage in according to the man?
Section B
Passage One
Most successful people are unorthodox persons whose minds wander outside traditional ways ofthinking. Instead of trying to refine old formulas, they invent new ones. When Jean-Claude Killy made the French National Ski Team in the early 1960s, he was prepared to work harder than anyone else to be the best. At the crack of dawn he would run up the slopes with his sk is on, an unbelievably backbreaking activity. In the evening he would do weightlifting and running. But the other team members were working as hard and long as he was. He realized instinctively that simply training harder would never be enough. Killy then began challenging the basic theories of racing technique. Each week, he would try something different to see if he could find a better, faster way down the mountain.His experiments resulted in a new style that was almost exactly opposite the accepted technique of the time. It involved skii ng with his legs apart for better balance and sitting back on the sk is when he came to a turn. He also used ski poles in an unorthodox way to propel himself as he skied. The explosive new style helped cut Killy's racing time dramatically.In 1966 and 1967, he captured virtually every major sking trophy.The next year, he won three gold medals in the Winter Olympics, a record in sk i racing that has never been topped. Killy learned an important secret shared by many creative people: innovations don't require genius, just a willingness to question the way things have always been done.
Questions 9 to 11 are based on the passage you have just heard.
9. What does the speaker say about most successful people?
10. What does the speaker say about Killy's experiments?
11. What is said to be Killy's biggest honor in his skiing career?
Passage Two
Scientific experiments have demonstrated incredible ways to ld l a guinea pig, a small furry animal.Emotional upsets generate powerful and deadly toxic substances.Blood samples taken from persons experioncing intense fear or anger when injected into guinea pigs have killed them in less than two minutes.Imagin e what these poisonous substances can do to your own body.Every thought that you have affects your body chemistry within a split second. Remember how you feel when you're speeding down the highway and a big truck suddenly brakes twenty meters in front of you. A shock wave shoots through your whole system.Your mind produces instant reactions in your body. The toxic substances that fear, anger,frustration and stress produce not only k ill guinea pigs but kill us off in a similar manner.It is impossible to be fearful, anxious, irritated and healthy at the same time. It is not just difficult; it is impossible. Simply put, your body's health is a reflection of your mental health. Sickness will often then be a result of unresolved inner conflicts which in time show up in the body. It is also fascinating how our subconsci ous mind shapes our health. Do you recall falling sick on a day when you didn't want to go to school? Headaches brought on by fear? The mind-body connection is such that if, for example, we want to avoid something, very often our subconscious mind will arrange it. Once we recognize that these things happen to us, we are halfway to doing something about them.
Questions 12 to 15 are based on the passage you have just heard.
12. What happens to guine a pigs when blood samples of angry people are injected into them?
13. What does the speaker say about every thought you have?
14. What does the speaker say is impossible?
15. What does the passage say about our mind and body?
Section C
Recording One
Teachers and students alike have experienced the curious paradox that beginners,as a rule, tend to think too little about what they are doing because they think too much about what they are doing. Take, for example, people who are learning to play basketball or the piano.They have to give so much thought and attention to the low-level mechanics of handling the ball or fingering the keys or reading the music,that they are unable to give any thought to the thing that matters the game, or the music, respectively.
With experts, it's just the other way around. They're open to the tactical possibilities and themusical challenges precisely because they're freed, through skill, from the need to pay attention to the low-level details of how to play. Indeed, when the expert pays attention to the mechanics , this is liable to disrupt performance. This has led some to say that the expert operates in a zone“beyond thought,”in a state of flow. But this is misleading. Expert performance is not beyond thought.Smart basketball players or skilled musicians need to pay close attention to the demands of high performance, to the challenges to be overcome. What they don't need to do—what would be a distraction—is to have to think about where their fingers are, or how to control the ball while running. It's not mechanics, but the play itself, that absorbs the expert's intelligence.
A nice video published online last month sheds light on expertise and the conscious mind. The video reports a new study using an eye-tracking device. It turns out that the less-skilled pianist spends more time looking at her fingers than does the expert who, in contrast, is more likely to be looking at the sheet music, or looking ahead at keys he's not yet playing. In general, the expert's gaze was calmer and more stable.
This is not a surprising finding.It supports what we might almost think of as conventional wisdom.But it's remarkable for all that, nonetheless. The eye tracker gives expert and learning performers a glimpse into what they do without thinking about it. The topic of the nature of skill—and the differences between beginners and experts—has been one of considerable discussion in cognitive science and philosophy.
Questions 16 to 18 are based on the recording you have just heard.
16. What does the speaker say about beginners and exper t pianists?
17. What do smart basketball players do according to the speaker?
18. What do we learn about the new study published in an online video?
Recording Two
Every summer, when I top up my selection of summer outfits from the department stores, my eyes would nearly pop out of my head.I'm overwhelmed with a wide range of different slimming products each year. And more shockingly, these products are often advocated by very slim models. Having lived in Asia for almost 10 years now, I've seen various dieting tips come and go. I remember in Japan, people heading directly to the fruit section in the supermarket when the banana diet was at its peak. Then there was the black tea and oolong tea diet, followed by the soybean diet and the tomato juice diet. The list goes on and on.
Apart from what people eat, I've also seen many interesting slimming products.In Hong Kong, I've seen girls wrapping their whole body or both legs up with a special type of slimming tape which is supposed to help make them thinner. But it just reminded me of the roasted ha m my mother usually puts on the dinner table at Christmas. Then there were the face slimming rollers that were said to improve your blood circulation and make your face smaller. Personally, I do not believe in any of these slimming gadgets and I think I have a very different perspective when it comes to the definition of what is beautiful.
Asian women prefer to avoid the sun, because being pale or white is considered beautiful, whereas a tanned complexion is considered much more beautiful and sex y in the West.It is most certainly shaped by a person's culture as well as how they were raised in their childhood.
As each summer season approaches, there's no escape from it. But it's not only women who are affected by this pressure to look good. Men aspire to be able to show off their six packs or their V-shaped backs,and there's a growing market of slimming pills aimed at men too.
I think no matter what diets we follow or what slimming products we obsess ourselves with, at the end of the day there's no magic trick to shape up for the summer. Eat in a balanced way and incorporate the right level of physical activity. For me, this still seems to be the best plan.
Questions 19 to 21 are based on the recording you have just heard.
19. What overwhelms the speaker when she buys her summer outfits each year?
20. What does the speaker think of girls wrapping their legs up with slimming tape?
21. What does the speaker think affects people's interpretation of beauty?
Recording Three
Skin may seem like a superfi cial human attribute, but it's the first thing we notice about anyone we meet.As a zoologist focusing on the studies of apes and monkeys, I've been studying why humans evolved to become the naked ape, and why skin comes in so many different shades around the world. We can make a very good estimate from the fossil record that humans probably evolved naked skin around 1.5 million years ago, and meanwhile they mostly lost their coat of fur.
Today we have a few patches of hair remaining on various parts of our bodies. But compared with apes and monkeys, we have very little.Basically, we turned our skin darker to serve as a natural sun protector in the place of the hair we lost.We think we lost this hair because of the need to keep ourselves cool when we were moving around vigorously in a hot environment. We can't really lose heat by breathing quickly and loudly like dogs. We have to do it by sweating. So we evolved the ability to sweat plentifully and lost most of our fur. Most animals protect themselves from the sun with fur.What we did in our ancestry was to produce more permanent natural coloring in our skin cells. This was really an important revolution in human history because it allowed us to continue to evolve in equatorial environments.It really made it possible for us to continue along the path toward modern humans in Africa.
For most of human history, we all had dark skin. What we see today is the product of evolutionary events resulting from the dispersal of a few human populations out of Africa around 60,000 to 70,000 years ago. Our species originated around 200,000 years ago and underwent tremendous diversification—culturally,technologically, linguistically, artistically—for 130,000 years.After that, a few small populations left Africa to pop ulate the rest of the world. These early ancestors of modern Eurasians dispersed into parts of the world that had more seasonal sunshine and much lower levels of sun radiation.It's in these populations that we begin to see real changes in the genetic makeup of natural coloring.
Today, skin color is evolving in the new mixtures of people coming together and having children with new mixtures of skin color genes. We can see this in almost every large city worldwide. Not only the coloring genes but lots of other genes are getting mixed up, too.
Questions 22 to 25 are based on the recording you have just heard.
22. What does the speaker mainly talk about?
23. What had probably caused humans to lose most of their hair 1.5 million years ago?
24. What does the speaker say protected early humans from the sun?
25. What happened after humans migrated from Africa to other parts of the world?
1.C)。詳解：凱西說(shuō)她跟新娘布倫達(dá)在一起工作才六個(gè)月，但很快就成了好朋友。上周，她們剛完成了一個(gè)很難纏的客戶(hù)的項(xiàng)目。因此答案為C)。
2.A)。詳解：對(duì)話(huà)中男士說(shuō)，他會(huì)在婚禮期間拍攝照片，并把這些照片當(dāng)成新婚禮物送給新人。因此答案為A)。
3.B)。詳解：對(duì)話(huà)中，凱西提到了nervous這個(gè)詞，雖然她答應(yīng)為布倫達(dá)的婚禮烤制蛋糕，但她還是有點(diǎn)緊張，她認(rèn)為自己離專(zhuān)業(yè)人士還差得很遠(yuǎn)。因此答案為B)。
4.A)。詳解：對(duì)話(huà)中，男士說(shuō)女士烤的甜點(diǎn)很美味，并說(shuō)憑她的活動(dòng)策劃經(jīng)驗(yàn)，她完全可以開(kāi)一家自己的店。由此可知，男士建議女士開(kāi)一家蛋糕店。因此答案為A)。
5.C)。詳解：對(duì)話(huà)中男士說(shuō)，大學(xué)與高中有很多方面都不一樣，與高中生相比，最重要的一點(diǎn)就是大學(xué)生必須對(duì)自己的行為擔(dān)負(fù)起更多的責(zé)任。因此答案為C)。
6.D)。詳解：對(duì)話(huà)中男士說(shuō)，上了大學(xué)，言行舉止就應(yīng)該像一個(gè)成年人。因此答案為D)。
7.B)。詳解：對(duì)話(huà)中男士明確指出，女士會(huì)交到有趣的朋友，但是她只需要結(jié)交那些能夠尊重她在學(xué)業(yè)上的堅(jiān)守的朋友。因此答案為B)。
8.D)。詳解：對(duì)話(huà)中男士提到，大學(xué)里還有很多很棒的俱樂(lè)部，但是男士認(rèn)為，除非這些俱樂(lè)部活動(dòng)與學(xué)習(xí)直接相關(guān)，否則不應(yīng)該在這些活動(dòng)上花費(fèi)太多時(shí)間。由此可知，男士認(rèn)為大學(xué)生應(yīng)該參加那些對(duì)他們的學(xué)業(yè)有幫助的俱樂(lè)部活動(dòng)。因此答案為 D)。
9.A)。詳解：短文一開(kāi)頭就提到，大多數(shù)成功人士都不怎么傳統(tǒng)，他們的思想游離于傳統(tǒng)的思維方式之外。他們不是去嘗試改善舊方法，而是去創(chuàng)造新方法。因此答案為A)。
10.B)。詳解：短文中提到，基利的實(shí)驗(yàn)產(chǎn)生了一套全新的滑雪技巧，而這些技巧幾乎與當(dāng)時(shí)公認(rèn)的滑雪技巧完全相反。因此答案為B)。
11.C)。詳解：短文中提到，在1966年和1967年，基利幾乎贏得了所有重大滑雪賽事的獎(jiǎng)杯。第二年，他在冬季奧運(yùn)會(huì)上獲得了三枚金牌，創(chuàng)下了滑雪比賽的最高紀(jì)錄。因此答案為C)。
12.D)。詳解：短文中提到，當(dāng)把從極度憤怒或恐懼的人身上提取的血液樣本注射到豚鼠體內(nèi)時(shí)，它們不到兩分鐘就死亡了。因此答案為D)。
13.A)。詳解：短文中提到，你的每一個(gè)想法都會(huì)在一瞬間對(duì)你體內(nèi)的化學(xué)物質(zhì)產(chǎn)生影響。因此答案為A)。
14.D)。詳解：短文中提到，恐懼、焦慮、憤怒和健康是不可能同時(shí)并存的。簡(jiǎn)單來(lái)說(shuō)，身體健康是心理健康的反映。由此可知，人們?cè)谇榫w不好時(shí)依然能保持身體健康是不可能的。因此答案為D)。
15.A)。詳解：短文中提到，我們的心理會(huì)在我們的身體里產(chǎn)生即時(shí)的反應(yīng)，同樣，我們的潛意識(shí)也會(huì)影響我們的健康。由此可判斷，我們的心理和健康有著緊密的聯(lián)系。因此答案為A)。
16.B)。詳解：講座中提到，初學(xué)鋼琴或者剛剛學(xué)會(huì)打籃球的人關(guān)注的是低層次的技巧，而達(dá)到大師或?qū)＜壹?jí)的演奏者或者球員則剛好相反，他們已經(jīng)不受基本技術(shù)的限制，而能夠擁有許多戰(zhàn)術(shù)上的可能性，或是能夠進(jìn)行音樂(lè)方面的更多挑戰(zhàn)。由此可知，鋼琴初學(xué)者和鋼琴演奏大師的關(guān)注點(diǎn)不同。因此答案為B)。
17.D)。詳解：講座中提到，聰明的籃球運(yùn)動(dòng)員和鋼琴演奏大師都會(huì)時(shí)刻關(guān)注對(duì)高水平表現(xiàn)或演奏的要求，重視并完成挑戰(zhàn)。由此可知，聰明的籃球運(yùn)動(dòng)員十分重視高水平的表現(xiàn)。因此答案為D)。
18.C)。詳解：講座中提到，視頻所展示的內(nèi)容證明了我們的傳統(tǒng)觀點(diǎn)。因此答案為C)。
19.D)。詳解：講話(huà)者提到，每年夏天她去商店買(mǎi)衣服都會(huì)被各種系列的減肥產(chǎn)品搞得不知所措。因此答案為D)。
20.B)。詳解：講話(huà)者提到，她曾經(jīng)在香港看到有很多女孩把自己的整個(gè)身體或雙腿用一種特殊的減肥膠帶裹起來(lái)，目的是能讓自己更瘦一點(diǎn)。但在講話(huà)者眼中，她們就像她的媽媽通常在圣誕節(jié)時(shí)放在餐桌上的烤火腿。也就是說(shuō)，這些女孩的樣子在講話(huà)者看來(lái)很奇怪。因此答案為B)。
21.A)。詳解：講座中提到，人們對(duì)美的理解與人所處的文化環(huán)境有關(guān)，也受人們幼時(shí)成長(zhǎng)經(jīng)歷的影響。因此答案為A)。
22.C)。詳解：講座開(kāi)頭提到，皮膚是人體的一個(gè)屬性，講話(huà)者一直在研究為什么人類(lèi)進(jìn)化成裸猿，以及為什么世界各地有這么多不同的膚色。接下來(lái)講話(huà)者提到，由于人類(lèi)缺少毛發(fā)，皮膚變成了深色，以此來(lái)作為天然的防曬屏障；在人類(lèi)進(jìn)化歷史的大多數(shù)時(shí)間，人類(lèi)的皮膚一直是深色的，但是隨著人類(lèi)遷徙到太陽(yáng)輻射水平較低的地方，他們的皮膚顏色又發(fā)生了變化；最后講話(huà)者提到，當(dāng)今，不同膚色的人聚集在一起又進(jìn)化出了新的混合膚色，由此來(lái)解釋講座開(kāi)頭提到的為什么世界各地有這么多不同的膚色。因此，本文大意為人類(lèi)皮膚的顏色，答案為C)。
23.B)。詳解：講座中提到，講話(huà)者認(rèn)為，150萬(wàn)年前，人類(lèi)大量毛發(fā)消失，原因是人們需要在炎熱的環(huán)境中保持身體的涼爽。人們沒(méi)辦法像狗那樣通過(guò)急促、粗重的呼吸來(lái)散發(fā)熱量，必須通過(guò)流汗來(lái)散熱。因此，人們進(jìn)化出大量出汗的能力，并失去了大部分的毛發(fā)，答案為B)。
24.C)。詳解：講座中提到，跟猿類(lèi)和猴子相比，我們的毛發(fā)非常少。大多數(shù)動(dòng)物用毛發(fā)保護(hù)自己不受日曬，而我們的祖先所做的是在我們的皮膚細(xì)胞中產(chǎn)生永久的天然色素。我們的皮膚顏色會(huì)變深，加深的膚色是對(duì)日曬的天然防護(hù)。因此答案為C)。
25.A)。詳解：講座中提到，一部分人離開(kāi)非洲來(lái)到了世界各地。他們來(lái)到那些擁有四季變化、日曬也不那么強(qiáng)烈的地方，體內(nèi)的天然色素的基因構(gòu)成開(kāi)始發(fā)生變化。因此答案為A)。
瘋狂英語(yǔ) 英語(yǔ)語(yǔ)法 新概念英語(yǔ) 走遍美國(guó) 四級(jí)聽(tīng)力 英語(yǔ)音標(biāo) 英語(yǔ)入門(mén) 發(fā)音 美語(yǔ) 四級(jí) 新東方 七年級(jí) 賴(lài)世雄 zero是什么意思成都市玉泉南苑英語(yǔ)學(xué)習(xí)交流群
