A new international study shows that some people's biological clock plays a powerful role for their life expectancy, regardless of lifestyle choices.

Published in the latest issue of Aging on Wednesday, the study has found the most definitive evidence to explain why some people keep healthy lifestyle but die younger than others.

Geneticist Steve Horvath from the University of California, Los Angeles (UCLA), led a team of 65 scientists around the world to record age-related changes to human DNA, analyse blood samples collected from 13, 000 people and estimate their lifespan.

A higher biological age, regardless of actual age, consistently predicts an earlier death, the study says.

"You get people who are vegan, sleep 10 hours a day, have a low-stress job, and still end up dying young," Horvath said in a statement. "We have shown some people have a faster innate aging rate."

The findings discovered that 5 percent of the population ages at a faster biological rate, which translated to a roughly 50 percent higher than average risk of death at any age.

"The great hope is that we find anti-aging interventions that would slow your innate aging rate," Horvath said, adding that "this is an important milestone to realizing this dream."

1.Some people keep healthy lifestyle but die younger than others because ________.

A. their biological clock is not powerful enough

B. the most definitive evidence has been found

C. they have a higher actual age than others

D. they ages at a relatively faster biological rate

2.How was the study conducted?

A. By collecting and analyzing data.

B. By interviewing lots of people.

C. By researching previous studies.

D. By studying different lifestyles.

3.According to the study, it can be inferred that ________.

A. people who keep healthy lifestyle tend to live longer

B. people’s lifespan can be predicted by their age

C. 5 percent of people are believed to have a faster innate aging rate

D. anti-aging interventions have proved to slow the innate aging rate

4.Which of the following would be the best title for the passage?

A. We all should keep healthy lifestyle

B. Geneticist finds anti-aging interventions

C. Biological clock predicts life expectancy

D. Horvath builds an important milestone

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：2016-2017學(xué)年黑龍江大慶鐵人中學(xué)高一上期末考試英語(yǔ)卷（解析版） 題型：短文改錯(cuò)

短文改錯(cuò)

假定英語(yǔ)課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫的以下作文。文中共有10處語(yǔ)言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處加一個(gè)漏字符號(hào)(∧)，并在其下面寫出該加的詞。

刪除：把多余的詞用斜線(\)劃掉。

修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫出修改后的詞。

注意：1. 每處錯(cuò)誤及其修改均僅限一詞；

2. 只允許修改10處，多者 (從第11處起) 不計(jì)分。

Li Hua and Wang Hai are students of Senior One. They all work hard but have different learning methods. Li Hua listens to her teachers attentive and tries to catch everything the teachers say. She spends more time doing her homework. It is certain what she can go to bed earlier and always keeps energetic in the day.

However, Wang Hai had a different way of learning. He likes to stay up late at the night, so he often feels sleepy in class. As the result, he misses lots of key point and it usually takes him more time to finish his homework, that makes it difficult for him to concentrate what he is doing. I prefer Li Hua's learning method.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆河南豫南九校高三上期末質(zhì)量考評(píng)英語(yǔ)試卷（解析版） 題型：閱讀理解

A trip across the Pacific will guarantee you a different experience with a tipping(給小費(fèi)) culture you’ve never come across in China.

In the US,giving a little extra money to service workers on top of your bill is a common practice.

Though US national law requires that businesses pay workers at least $7.25 (45 yuan) per hour,employees receiving tips—often waiters and waitresses—are the exceptions.They usually only receive at least $2.13 an hour,and tips make up the difference.As The Wall Street Journal put it:“The American system of tipping holds the promise of great rewards for waiting staff.”

So how should you tip if you are in the US?

Normally you pay tips as a percentage of the bill.Offering an extra 15 percent of the bill to the waiter or waitress in a restaurant and to the delivery man or woman is customary and expected.You can offer more for great service and less for poor service.

Yet there is an exception.For take-out food,you don’t have to provide tips,though some people say that filling an order still requires work and time that deserve a little extra—but maybe a little less.

Tips are not expected at fast food restaurants,pizza parlors,cafés or ice cream shops either,though a tip jar might be right by the cash register (收銀機(jī)).Don’t feel obligated to throw some money in,but also remember that it doesn’t hurt.Those workers do not rely on tips.

Other service workers also receive tips.For taxi drivers,15 percent is the norm (標(biāo)準(zhǔn)),more if they help with your bags.Hairdressers often receive about 15 percent of the bill.The same goes for spa therapists(理療師) and tour guides.

Today,you can even pay tips on a credit card.When receiving a copy of the bill to sign,you are free to fill in how much you’d like to tip.

Though thinking about when to tip and how much you should tip causes a big headache for many Chinese people,it’s important to bear in mind that as long as you show respect and use your reasoning,things will be just fine.

1.What is the article mainly about?

A. How tipping culture started in the US.

B. How to give tips properly in the US.

C. New ways to give tips in the US.

D. The different attitudes that Chinese people and Americans have toward tipping.

2.Which of the following is said to be against the norm of tipping in the US?

A. Paying waiters and waitresses less than $7.25 per hour.

B. Ignoring the tip jar at fast food restaurants,cafés,or ice cream shops.

C. Tipping taxi drivers less than 15% because of poor service.

D. Refusing to give tips to your tour guide.

3.The underlined word “obligated” in Paragraph 7 probably means 　　　.

A. being forced to do something B. being grateful for something

C. being surprised at something D. being embarrassed about something

4.According to the author,Chinese consumers 　　　.

A. don’t necessarily have to follow the tipping rules in the US

B. should use their credit cards to give tips

C. must argue about the amount of tip they have to pay

D. should take it easy and give the correct tips for different occasions

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆河北正定中學(xué)高三上期中英語(yǔ)試卷（解析版） 題型：七選五

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

The Science of Risk-Seeking

Sometimes we decide that a little unnecessary danger is worth it because when we weigh the risk and the reward, the risk seems worth taking. 1. Some of us enjoy activities that would surprise and scare the rest of us. Why? Experts say it may have to do with how our brains work.

The reason why any of us take any risks at all might have to do with early humans. Risk-takers were better at hunting, fighting, or exploring. 2. As the quality of risk-taking was passed from one generation to the next, humans ended up with a sense of adventure and a tolerance for risk.

So why aren’t we all jumping out of airplanes then? Well, even 200, 000 years ago, too much risk-taking could get one killed. A few daring survived, though, along with a few stay-in-the-cave types. As a result, humans developed a range of character types that still exists today. So maybe you love car racing, or maybe you hate it. 3.

No matter where you are on the risk-seeking range, scientists say that your willingness to take risks increases during your teenage years. 4. To help you do that, your brain increases your hunger for new experiences. New experiences often mean taking some risks, so your brain raises your tolerance for risk as well.

___5. For the risk-seekers, a part of the brain related to pleasure becomes active, while for the rest of us, a part of the brain related to fear becomes active.

As experts continue to study the science of risk-seeking, we’ll continue to hit the mountains, the waves or the shallow end of the pool.

A. It all depends on your character

B. Those are the risks you should jump to take.

C. Being better at those things meant a greater chance of survival.

D. Thus, these well-equipped people survived because they were the fittest.

E. This is when you start to move away from your family and into the bigger world.

F. However, we are not all using the same reference standard to weigh risks and rewards.

G. New brain research suggests our brains work differently when we face a nervous situation.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆廣東肇慶高三第二次模擬考試英語(yǔ)試卷（解析版） 題型：語(yǔ)法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（1個(gè)單詞)或括號(hào)內(nèi)單詞的正確形式。

I’ve dreamed of becoming a writer since I was a teenager. But 1.____ isn’t easy to get a book of mine published. 2.___ I’ve tried hard, none of my books have been published. This is really 3._____ (upset).

This morning, I received a call from a publisher and 4.___ (tell) once again that there was no way my book would be published. 5.____ (feel) sad, I left home and went to the park near my apartment. At the park, I sat down on the bench near the grass.

While I was sitting there, I saw a little boy about one and a half years old. He was running on the grass, 6.____ his mother not far behind him. He looked so happy when he enjoyed the 7.____ (free) of running on the grass. He then fell on the grass, but he quickly got up and continued 8.___ (run) as fast as he could again even without looking back at his mother. He was still running with a smile on his face, as if nothing 9.____ (happen).

Seeing that, I was truly inspired. I 10.___ (sudden) realized that I shouldn’t get discouraged after experiencing failure. Instead, I should cheer up and keep on trying.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆廣東省揭陽(yáng)高三上期末調(diào)研考試英語(yǔ)試卷（解析版） 題型：完形填空

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)（A, B, C, D）中，選出可以填入空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。

The most important lesson I learned in high school had nothing to do with maths or American history. It came at graduation, several minutes ________ I left Miramonte High School.

I was rather shy back then, content to hang around with my few friends and to concentrate on my ________. I was doing so well that by the end of senior year I had perfect ________ and enough credits to go to college.

But my good record soon became a fear to my well-being．In early June of senior year, the headmaster called me into his office. He asked me to give a leave-taking speech at graduation．I looked at him, my heart ________ fast. This was the reward for my hard work? I said something, but not very clearly, and hurried away from the office.

I was ________ about the decision, though finally agreeing to take up the task. I wasn't the only speaker—I would ________ the honor with five other students．Still, I was uncertain whether the task was beyond me. How in the world would I give a speech to hundreds of people?

Graduation day soon arrived and, as ________, I was nervous．I'd been practicing my speech for days, and I had it ________. But I had ________ been so terrified in my life. The first half hour of the ________ passed, and then my ________ came. My name was announced. I ________ to reach the platform without falling down. But within minutes, I finished my speech, ________ back to my seat.

Now I still have the ________ of that speech. My voice trembled a little, but ________ it was clear and strong. I'm proud of that tape．I achieved ________ I'd never dreamed — I spoke in front of hundreds of people．Although I didn't realize it at the time, the successful completion of that speech gave me the ________ to participate in class at college, to give oral reports, and to eventually break free of my ________.

I never would have chosen to give a speech at graduation. But I'm ________ I did. I know it may well ________ to be one of my shining moments.

1.A. beforeB. afterC. whenD. while

2.A. hobbiesB. interestsC. gamesD. subjects

3.A. mannersB. relationshipC. scoresD. characters

4.A. burningB. breakingC. achingD. beating

5.A. doubtfulB. optimisticC. generousD. hesitant

6.A. shareB. bringC. spareD. give

7.A. intendedB. hopedC. expectedD. planned

8.A. thrownB. printedC. memorizedD. completed

9.A. everB. neverC. alwaysD. hardly

10.A. lessonB. taskC. ceremonyD. match

11.A. momentB. dayC. chanceD. decision

12.A. managedB. triedC. wantedD. succeeded

13.A. passingB. headingC. handingD. sitting

14.A. photoB. tapeC. paperD. word

15.A. partlyB. immediatelyC. franklyD. mostly

16.A. everythingB. anythingC. nothingD. something

17.A. respectB. confidenceC. freedomD. excuse

18.A. shynessB. prideC. stupidityD. courage

19.A. afraidB. sureC. gladD. puzzled

20.A. turn offB. turn outC. set offD. set out

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆吉林長(zhǎng)春外國(guó)語(yǔ)學(xué)校高三上期末考試英語(yǔ)試卷（解析版） 題型：語(yǔ)法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（1個(gè)單詞）或括號(hào)內(nèi)單詞的正確形式。

The relationship between parents and children has always been a hot topic. Many students may feel 1. (stress) because of their parents. Most parents have good intentions, 2. some of them aren’t very helpful with the problems their sons and daughters have in 3. (adjust) to college, and a few of them seem to go out of their way to add to their children’s 4. (difficulty).

For one thing, parents are often not aware of the kinds of problems their children face. They don’t realize that the 5. (compete) is stronger, that the required standards of work are 6. (high), and that their children may not be prepared for 7. change. They may be upset by their children’s poor grades. At their kindest, they may 8. (gentle) ask why John or Mary isn’t doing better, whether he or she is trying as hard as he or she could, and so on. At their worst, they may threaten 9. (take) their children out of college or cut off living expenses.

Sometimes parents think it right and natural that they determine 10. their children should do with their lives. They forget that everyone is different and that each person must develop in his or her own way.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆湖北荊門市高三元月調(diào)考英語(yǔ)試卷（解析版） 題型：語(yǔ)法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（1個(gè)單詞）或括號(hào)內(nèi)單詞的正確形式。

I was in the seventh grade. In a school of 1. ( main ) white students, I didn’t fit in anywhere. I was one of the four Asia students, so I ended up hanging out with other 2. (minority). During every lunch period, I would play a card game with one of my closest friends, Evan and tell 3. everything.

One afternoon, I was walking with Evan. As we turned a corner, Evan stopped 4.

( talk ) to me, “ Why are you talking to me? I am not your friend.” Then he kept walking and never looked back. 5. ( shock ) by his words, I stood with tears in my eyes .

We didn’t speak to each other after that, and I didn’t get close to anyone for fear of 6. ( hurt ) again. It wasn’t until in high school 7. I began to trust other people again. What Evan said that day made me realize that I could make friends but I must be careful in choosing

8. whom I open up.

If that incident 9. (happen), I wouldn’t have made new friends in high school and met the people who 10. (be ) my best friends now.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2017屆北京西城區(qū)高三上期末考試英語(yǔ)試卷（解析版） 題型：閱讀理解

When the telephone rings late at night, most women guess it must be one of only four or five people calling. A sister?Maybe.An emergency?Possibly.A mother?Probably not at that time of night. Much more probably it is a close female friend calling to tell you that she has split up with her boyfriend again or perhaps simply that a good movie has just started on TV.

At a time when families are spread far and wide and marriages often end in divorce, friendships are becoming more and more important. Erika, a 32-year-old lawyer, is strengthened by her ten-year friendship with her married friend Jane. “I was very sick one night, so I called Jane at about 3:00 a.m. to talk about it,” she says. “She was very supportive and even came over to take me to the doctor’s the next morning.”

As American TV shows like Friends, which follows the lives of a very close group of young friends, have become more popular, many of us are beginning to see the value of such friendships. TV shows like this tell us that our romantic relationships may not last, but we need to keep in touch with our close friends if we want to survive.

A TV show called Real Women is about the lives and relationships of five former school friends. In this show, family, husbands, and work are all less important than friendships. One of its actresses says the show reflects her own experience. “Friendship is about commitment. I don’t see some of my friends for ages but when we get together, it is as if time hasn’t passed.”

This is true of Erika and Jane’s friendship. With Erika’s family 200 miles away, it is Jane who keeps a spare set of keys to Erika’s apartment and waters her plants whenever she is away. “Having Jane around gives me a certain amount of freedom. It is not the kind of thing that you could ask anyone to do, but she knows I would do the same for her.” Erika feels that because she no longer sees her family every day, she now enjoys a closer relationship with her best friend. Jane, who may move to a different city soon, is worried about leaving such a support system of friends. “My friends have more to do with my life than my parents and, therefore, I don’t have to spend a lot of time explaining things to them. Friends are more up to date with what is happening.”

1.According to the passage, a late-night phone call for most women is probably from ________.

A. a friendB. a relativeC. a strangerD. a doctor

2.TV shows like Friends tell us that ________.

A. marriages with friends often end up in failure

B. families and work are as important as friends

C. close friends help us face problems in life

D. friendship fades as time goes by

3.From the passage, we can learn that Erika and Jane ________.

A. live far away from each other

B. have been friends for 32 years

C. spend a lot of time explaining things

D. trust and support each other in daily life

4.Which of the statements will the author probably agree with?

A. A near friend is more helpful than a faraway relative.

B. Both marriage and friendship demand commitment.

C. However far away we’re, parents worry about us.

D. Long distance makes the hearts closer.

查看答案和解析>>

同步練習(xí)冊(cè)答案