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Forty May Be the New 30 As Scientists Redefine Age Is 40 really the new 30？ In many way

s people today act younger than their parents did at the same age.

Scientists have defined a new age concept and believe it could explain why populations are aging, but at the same time seem to be getting younger.

Instead of measuring aging by how long people have lived, the scientists have factored in how many more years people can probably still look forward to.

"Using that measure, the average person can get younger in the sense that he or she can have even more years to live as time goes on," said Warren Sanderson of the University of New York in Stony Brook.

He and Sergei Scherbov of the Vienna lnstitute of Demography (人口统计学) at the Austrian (奥地利的) Academy of Sciences, have used their method to estimate how the proportion of elderly people in Germany, Japan and the United States will change in the future.

The average German was 39.9 years old in 2000 and could plan to live for another 39.2 years, according to research reported in the journal Nature on Wednesday.

However, by 2050 the average German will be 51.9 years old and will be expected to live another 37.1 years. So middle age in 2050 would occur at around 52 years instead of 40 years as in 2000.

"As people have more and more years to live they have to save more and plan more and they effectively are behaving as if they were younger," said Sanderson.

Five years ago, the average American was 35.3 years old and could plan for 43.5 more years of life. By 2050, the researchers estimate it will increase to 41.7 years and 45.8 future years.

"A lot of our ski/Is, our education, our savings and the way we dear with our health care depend a great deal on how many years we have to live," said Sanderson.

This dimension of how many years people have to live has been completely ignored in the discussion of aging so far.

第36题：People 40 years of age today seem to be as young as

A．their parents were at the same age.

B．their parents were at the age of 30.

C．their children will be at the same age.

D．their children will be at the age of 30.

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更多“Forty May Be the New 30 As Sci…”相关的问题

第1题

She may need some help _______ she's new here.

A.but

B.although

C.and

D.as

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第2题

You may __________ the dictionary if you meet new words in your reading.

A、look for

B、look into

C、look after

D、look up

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第3题

What will the next decade bring, as we move into a new millennium？ That’s getting hard

er and harder to predict. Change is coming so fast that some of the most important technologies of the 21st century may now be just a sketch on the drawing board or glimmer in the mind of genius. Then again, the transcendent technologies may be right under our noses on the verge of having as great an impact as the car or telephone.

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第4题

The mass media is a big part of our culture, yet it can also be a helper, adviser and teac

her to our young generation. The mass media affects the lives of our young by acting as a (an)【1】for a number of institutions and social contacts. In this way, it【2】a variety of functions in human life.

The time spent in front of the television screen is usually at the【3】of leisure: there is less time for games, amusement and rest.【4】by what is happening on the screen, children not only imitate what they see but directly【5】themselves with different characters. Americans have been concerned about the【6】of violence in the media and its【7】harm to children and adolescents for at least forty years. During this period, new media【8】, such as video games, cable television, music videos, and the Internet. As they continue to gain popularity, these media,【9】television,【10】public concern and research attention.

Another large societal concern on our young generation【11】by the media, is body image.【12】forces can influence body image positively or negatively.【13】one, societaland cultural norms and mass media marketing【14】our concepts of beauty. In the mass media, the images of【15】beauty fill magazines and newspapers,【16】from our televisions and entertain us【17】the movies. Even in advertising, the mass media【18】on accepted cultural values of thinness and fitness for commercial gain. Young adults are presented with a【19】 defined standard of attractiveness, a(n)【20】that carries unrealistic physical expectations.

(1)

A．alternative

B．preference

C．substitute

D．representative

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第5题

The Gene IndustryMajor companies are already in pursuit of commercial applications of the

The Gene Industry

Major companies are already in pursuit of commercial applications of the new biology. They dream of placing enzymes in the automobile to monitor exhaust and send data on pollution to a microprocessor that will then adjust the engine. They speak of what the New York Times calls "metal-hungry microbes that might be used to mine valuable trace metals from ocean water". They have already demanded and won the right to patent new lifeforms.

Nervous critics, including many scientists, worry that there is corporate, national, international, and inter-scientific rivalry in the entire biotechnological field. They create images not of oil spills, but of "microbe spills" that could spread disease and destroy entire populations. The creation and accidental release of extremely poisonous microbes, however, is only one cause for alarm. Completely rational and respectable scientists are talking about possibilities that stagger the imagination.

Should we breed people with cow-like stomachs so they can digest grass and hay, thereby relieving the food problem by modifying us to eat lower down on the food chain？ Should we biologically alter workers to fit the job requirement, for example, creating pilots with faster reaction times or assembly-line workers designed to do our monotonous work for us？ Should we attempt to eliminate "inferior" people and breed a "super-race"？ (Hitler tried this, but without the genetic weaponry that may soon issue from our laboratories.) Should we produce soldiers to do our fighting？ Should we use genetic forecasting to pre-eliminate "unfit" babies？ Should we grow reserve organs for ourselves, each of us having, as it were, a "savings bank" full of spare kidney, lives or hands？

Wild as these notions may sound, every one has its advocates (and opposers) in the scientific community as well as its striking commercial application.-As two critics of genetic engineering, Jeremy Rifkin and Ted Howard, state in their book Who Should Play God'？ "Broad Scale genetic engineering will probably be introduced to America much the same way as assembly lines, automobiles, vaccines, computers and all the other technologies. As each new genetic advance becomes commercially practical, a new consumer need will be exploited and a market for the new technology will be created".

According to the passage, the exhaust from a car engine could probably be checked by ______.

A．using metal-hungry microbes

B．making use of enzymes

C．adjusting the engine

D．patenting new life forms

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第6题

The new year brought new desks for students at Vallecito ElementarySchool, in San Rafa

el, California.The last three of the school's 22 classroomsswitched from seated desks to standing desks.“It's now the first all-standingschool,” Juliet Starrett told TFK.She started the group StandUp Kids.Her goalis to have every U.S.public school kid using a standing desk within the next10 years.

Starrett's daughters—Georgia, 10, and Caroline, 7—attend Vallecito.They are thrilled with their desks.“You feel happier, you're less tired, andyou're more active,” Georgia says.

Some of the desks have wheels and fidget bars.The bars let kidsmove in a way that doesn't disturb the class.Wheels allow the desks to bemoved easily.The desks also adjust to different heights.Kids take breaks bysitting on the floor or on stools.

There is the trend of designing things to make them easy and safe touse.According to Mark Benden, director of the Texas A&M Center, standingworkers are more focused and healthier.He says his research shows that kidsusing standing desks are more engaged and burn more calories (卡路里).InDecember, researchers in New Zealand, Australia, and the United Kingdomreleased similar findings.But not everyone is convinced standing is betterthan sitting.Some parents and teachers worry that kids will get tired and thatstanding for long periods of time may be harmful.And standing desks are moreexpensive.

Benden says both sitting and standing desks can cause problems ifthey are not the proper height.“Our message should not be ‘Sit less, standmore,'” he says, “but ‘Sit less, move more.'”

11.How many classrooms in Vallecito areequipped with standing desks？()

A.3

B.25

C.19

D.22

12.What is Paragraph 3 mainly about？()

A.Why standing desks are used

B.Where standing desks are used

C.How standing desks are used

D.Who use standing desks

13.Mark Benden's research shows that kidsusing standing desks().

A.feel more tired

B.are more focused

C.get better scores

D.tend to eat more

14.The researchers in Australia and the UK(para.4)().

A.would agree with Benden

B.are not fully convinced by Benden

C.partly support Benden's findings

D.find it hard to accept Benden's theory

15.Some parents and teachers worry that usingstanding desks may().

A.disturb the kids in class

B.leave the classroom noisy

C.harm the students' health

D.increase the teachers' workload

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第7题

Because smoking is a form. of addiction, 80% percent of smokers who quit usually experienc

e some withdrawal symptoms (断症状瘾). These may include headache, light-headedness, and chest pains. Psychological symptoms, such as anxiety, short-term depression, and inability to concentrate, may also appear. The main psychological symptom is increased irritability. People become so irritable, in fact, that they say the feel "like killing some body". Yet there in no evidence that quitting smoking leads to physical violence.

Some people seem to lose all their energy and drive, wanting only to sleep. Others react in exactly the opposite way. Becoming so over energized that they can't find enough activity to burn off their excess energy. For instance, one woman said she cleaned out all her closets completely and was ready to go next to start on her neighbor's. Both these extremes, however, eventually, the symptoms may be intense for two or three days, but within 10 to 14 days after quitting, most subside (平静下来). The truth is that after people quit smoking, they have more energy, they generally will need less sleep, and feel better about themselves.

Quitting smoking not only extends the ex-smoker's life. but adds new happiness and meaning to one's current life. Most smokers state that immediately after they quit smoking, they start noticing dramatic differences in their overall health and vitality.

Quitting is beneficial at any age, no matter how long a person has been smoking. The death rate of an ex-smoker decreases after quitting. If the patient quits before a serious disease has developed, his/her body may eventually be able to restore itself almost completely.

Which of the following is the main psychological symptom of smokers who quit？ ______.

A．Being light-headed

B．Being anxious

C．Being easily annoyed

D．Being violet

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第8题

Scattered around the globe are more than 100 small regions of isolated volcanic activity k

nown to geologists as hot spots, unlike most of the world's volcanoes, they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of them lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The hot spots and their volcanic trails are milestones that mark the passage of the plates.

That the plates are moving is now beyond dispute. Africa and South America, for example, are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots, anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot spot population it appears that the African plate is stationary and that it has not moved during the past 30 mil lion years.

The significance of hot spots is not confined to their role as a frame. of reference. It now appears that they also have an important influence on the geophysical processes that propel the plates across the globe. When a continental plate comes to rest over a hot spot, the material rising from deeper layer creates a broad dome. As the dome grows, it develops deed fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hot spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy).

The author believes that ______.

A．the motion of the plates corresponds to that of the earth's interior

B．the geological theory about drifting plates has been proved to be truse

C．the hot spots and the plates move slowly in opposite directions

D．the movement of hot spots proves the continents are moving apart

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第9题

Notice of Baggage Inspection (检查)To protect you and your fellow passengers, the Transp

Notice of Baggage Inspection （检查)To protect you and your fellow passengers, the Transp

Notice of Baggage Inspection (检查)

To protect you and your fellow passengers, the Transportation Security Administration TSA.is required by law to inspect all checked baggage.As part of this process, some bags are opened and inspected.Your bag was among those selected for inspection.

During the inspection, your bag and its contents may have been searched for prohibited (违禁的) items.After the inspection was completed, the contents were returned to your bag.

If the TSA security officer was unable to open your bag for inspection because it was locked, the officer may have been forced to break the locks on your bag.TSA sincerely regrets having to do this.However, TSA is not responsible for damage to your locks resulting from this necessary security measures.

For packing tips and suggestions on how to secure your baggage during your next trip, please visit: www.tsa.gov.

We appreciate your understanding and cooperation.If you have questions, comments, or concerns, please feel free to contact the TSA Contact Center.

1、According to the passage, TSA is required to inspect your baggage ______.

A.with your written permission

B.at the request of police

C.by airlines

D.by law

2、According to the Notice, the purpose of the inspection is to ______.

A.find all overweight baggage

B.search for prohibited items

C.charge customs duties

D.check damaged items

3、After the inspection, the contents in your bag would ______.

A.be delivered to your address

B.be given to you in person

C.be returned to your bag

D.be kept at the airport

4、If your bag is locked, the TSA security officer may have to ______.

A.break the locks

B.hand it over to police

C.give up the inspection

D.ask you to open the bag

5、If the locks of your bag are damaged because of the inspection, TSA will ______.

A.pay for the damage

B.buy you a new lock

C.not be responsible for it

D.not inspect it in your next trip

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第10题

The rocket engine, with its steady roar like that of a waterfall or a thunderstorm, is

an impressive symbol of the new space age.Rocket engines have 11 powerful enough to shoot astronauts beyond the earth's gravitational pull and 12 them on the moon.We have now become travelers space.

Impressive and complex 13 it may appear, the rocket, which was invented in China over 800 years 14 , is a relatively simple device.Fuel that is burned in the rocket engine changes 15 gas.The hot and rapidly expanding gas must escape, but it can do so only 16 an opening that faces backward.As the gas is 17 with great force, it pushes the rocket in the 18 direction.Like the kick of a gun when it is fired, it 19 the laws of nature described by Sir Isaac Newton when he discovered that“ 20 every action, there is an equal and opposite reaction.”

11.A.shown

B.been

C.appeared

D.proved

12.A.send

B.land

C.take

D.carry

13.A.that

B.so

C.as

D.sometimes

14.A.in advance

B.before

C.earlier

D.ago

15.A.as

B.into

C.for

D.the

16.A.in

B.at

C.by

D.through

17.A.transmitted

B.dispersed

C.erected

D.radiated

18.A.same

B.other

C.opposite

D.wrong

19.A.states

B.proves

C.follows

D.breaks

20.A.like

B.as

C.with

D.for

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第11题

Most men and women pass (21) life without ever considering or criticizing (22) their o

Most men and women pass （21) life without ever considering or criticizing （22) their o

wn conditions or those of the world at large. They find themselves born into a certain place in society, and they accept what each day (23) , without any thought beyond what the immediate present requires. They seek the satisfaction of the needs of the moment, without much forethought, and without thinking that by sufficient effort the conditions of their lives (24) be changed. A certain percentage, guided by personal ambition, make the effort of thought and will which is necessary to place themselves among the more (25) members of the community; but very few among these are seriously concerned to secure for all the advantages which they seek for (26) . Only a few rare and exceptional men have that kind of love toward mankind at large that makes them unable to endure patiently the general mass of evil and suffering, (27) of any relation it may have to their own lives. These few, driven by sympathetic pain, will seek for some new system of society by which life may become richer, more full of (28) and less full of preventable evils (29) it is at present. But in the past such men have, as a rule, failed to interest the very victims of the injustices (30) they wished to remedy.

21.A.out

B.at

C.through

D.above

22.A.if

B.either

C.when

D.both

23.A.was

B.finishes

C.brings

D.is missing

24.A.could

B.must

C.would

D.had better

25.A.numerous

B.innocent

C.honest

D.fortunate

26.A.him

B.them

C.themselves

D.anyone

27.A.despite

B.regardless

C.because

D.on account

28.A.problems

B.themselves

C.excuses

D.joy

29.A.than

B.which

C.although

D.when

30A.who

B.which

C.where

D.whom

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