题目
题型：北京模拟题难度：来源：
in the neighborhood on her 121st birthday.
When it comes to long life, Jeanne Calment is the world" s recordholder. She lived to the ripe old age of
122. So is 122 the upper limit (限制) to the human life span (寿命)? If scientists come up with some sort of
pill or diet that would slow aging, could we possibly make it to 150-or beyond?
Researchers don"t entirely agree on the answers."Calment lived to 122, so it wouldn"t surprise me if
someone alive today reaches 130 or 135," says Jerry Shay at the University of Texas.
Steve Austad at the University of Texas agrees. "People can live longer than we think," he says. "Experts
used to say that humans couldn"t live past 110. When Calment blew past that age, they raised the number to
120. So why can"t we go higher?"
The trouble with guessing how old people can live to be is that it" s all just guessing."Anyone can make up
a number," says Rich Miller at the University of Michigan. " Usually the scientist who picks the highest number
gets his name in Time magazine.
Won"t new anti-aging techniques keep us alive for centuries? Any cure, says Miller, for aging would
probably keep most of us living until about 120. Researchers are working on treatments that make the life
span of mice longer by 50 percent at most. So, if the average (平均) human life span is about 80 years, says
Miller, " adding another 50 percent would get you to 120."
So what can we leam from this little disagreement among the researchers? That life span is flexible (有弹
性的), but there is a limit, says George Martin of the University of Washington. "We can get flies to live 50
percent longer," he says. " But a fly"s never going to live 150 years." Of course, if you became a new species
(物种), one that ages at a slower speed, that would be a different story, he adds.
Does Martin really believe that humans could evolve (进化) their way to longer life?"It" s pretty cool to
think about." He says with a smile.
B. Old people are creative.
C. Women are sporty at 85.
D. Women live longer than men.
B. scientists cannot find ways to slow aging
C. few people can expect to live to over 150
D. experts aren"t sure how long one can live
B. Steve Austad.
C. Rich Miller.
D. Ceorge Martin.
B. The average human life span cannot be doubled.
C. Scientists believe mice are aging at a slower speed than before.
D. New techniques could be used to change flies into a new species.
答案
核心考点
试题【阅读理解。 Jeanne Calment took up skating at age 85, made her first movie appeara】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
cities. Their answer is the bicycle, or bike.
In a great many cities, hundreds of people ride bicycles to work every day. In New York City, some bike
riders have even formed a group called "Bike for a Better City". They claim that if more people rode bicycles
to work there would be fewer automobiles in the downtown section of the city and therefore less dirty air
from car engines.
For several years this group has been trying to get the city government to help bicycle riders. For example,
they want the city to paint special lanes-for bicycles only-on some of the main streets, because when bicycle
riders must use the same lanes as cars, there may be accidents. "Bike for Better City" feels that if there were
special lanes, more people would use bikes.
But no bicycle lanes have been painted yet. Not everyone thinks it is a good idea. Taxi drivers don"t like the
idea-they say it will slow traffic. Some store owners on the main streets don"t like the idea-they say that if there
is less traffic, they will have less business. And most people live too far from downtown to travel by bike.
The city government has not yet decided what to do. It wants to keep everyone happy. On weekends,
Central Park-the largest open place in New York-is closed to cars, and the roads may be used by bicycles only.
But "Bike for a Better City" says that this is not enough and keeps fighting to get bicycle lanes downtown. Until
that happens, the safest place to bicycles may be in the park.
B. cars
C. planes
D. ships
B. The Central Park is closed to cars on weekdays.
C. "Bike for a Better City" members ride bicycles to work.
D. Accidents won"t happen if cars and bikes are on different lanes.
B. the main streets are not wide enough
C. the city government can"t help to paint the lanes
D. there"s no need for most people to travel by bike
B. "Bike for a Better City" and the city government
C. the government"s idea on traffic and city pollution
D. a suggestion on the city problems of traffic and pollution
in the waves, or on the grassland, you should make it clear that your choice of sports might have great
influence on the environment.
Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside,
but also tons of water. Besides, all kinds of chemicals and a great deal of energy are used to keep its fields
in good condition. This causes environmental problems. For example, in the dry areas of Portugal and Spain,
golf is often the cause of serious water shortage in some places.
There are many environment-friendly sports. Power walking is one of them that you could take up today.
You don"t need any special equipment except a good pair of shoes; and your don"t have to worry about
resources (资源) and you purse. Simple and free, power walking can also keep you fit. If you walk very
often, it will be good for your heart and bones. Experts (专家) say that 20 minutes of power walking daily
can make you feel less nervous, sleep well and have better weight control.
Whatever sport you take up,you can make it greener by using environment-friendly equipment and buying
products made from recycled materials (再生材料). But the final purpose should be "green gyms". Compared
with traditional health clubs and modern sports centers, they are better choices. Members of green gyms play
sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your
membership. And best of all, it"s free.
B. Playing football on the sports field.
C. Bicycle-riding in the countryside.
D. Playing volleyball in a sports center.
B. It"s very simple but costs a lot.
C. It makes you worry about resources.
D. It"s good for health and the environment.
B. encourage us to take up green sports
C. introduce some environment-friendly sports
D. tell us how sports influence the environment
diabetes (糖尿病). But researchers now know that whether or not you have diabetes, eating too much can
make your blood glucose go up and down and can increase the danger of heart disease. It may be even bad for
your memory.
This realization has greatly changed the way we understand food and health. Luckily, none of these things
happen ovemight, and even small changes in the food you eat every day can start you on a healthier path.
When you are hungry, do you reach for a chocolate cake or a box of biscuits? These "fast-acting" foods
are handy and they take no time at all to dissolve (溶化) in your stomach. Then they race into your blood,
running through your body with blood glucose. The trouble is the comfort doesn"t last long, leaving you feeling
hungry again. As a result, your blood glucose will run out of control.
It"s no wonder most of us have less energy than we"d like and feel tired too often. It"s also no wonder that
most of us weigh more than we want to. Yes, eating too much and exercising too liLtle are main reasons, and
ever changing blood glucose will send you shopping for bigger jeans.
For most of us even when our blood glucose goes up and down after a large meal, our body can bring it
back to normal in a few hours. Only people with untreated diabetes have blood glucose levels that stay quite
high most of the time.
For a long time, doctors thought that only these people needed to take care of their blood glucose levels.
Now, we know that even in healthy people, high levels after meals can damage (损坏) the body, even if it
never causes diabetes.
B. It stays on high levels.
C. It goes up and down.
D. It comes back to normal.
B. He thinks they are easy to get.
C. He thinks they make us healthy.
D. He thinks they damage our body.
B. Have proper food and exercise every day.
C. Eat certain kind of medicine before meals.
D. Ask the doctor for help from time to time.
traffic accidents can leave people with terrible physical and emotional (精神上的) hurts. Often they appear
again in dreams.
Now American researchers think they are close to developing a drug which will help people forget bad
memories. The drug is designed to he taken immediately after a frightening experience. They hope it might
reduce or possibly erase (清除) the effect of painful memories.
In November, experts tested a drug on people in the US and France. The drug stops the body producing
chemicals that fix memories in the brain. So far the research has suggested that only the emotional effects
of memories may be reduced, not all the memories are erased.
The research has caused a great deal of argument. Some think it is a bad idea, while others support it.
Supporters say it could lead to drugs that prevent or treat soldiers" troubling memories after war. They
say that there are many people who suffer from terrihle memories.
"Some memories can ruin (毁坏) people"s lives. They come back to you when you don"t want to have
them in a dream. They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry
at Harvard Medical School. "This could reduce a lot of that suffering."
But those who are against the research say that changing memories is very dangerous because memories
give us our identity (特质). They also help us all avoid the mistakes of the past."
All of us can think of bad experiences in our lives that were horrible at the time but make us who we are.
I"m not sure we want to erase those memories," said Rebecca Dresser, a medical ethicist.
B. make people forget what happened in the past
C. help soldiers get away from troubling memories
D. treat people who suffer from terrible memories
B. reduce the effect of bad memories
C. help people improve their memories
D. totally erase the painful memories
B. the drug can prevent people from sufferings
C. bad memories make us different from others
D. taking the drug will do harm to people"s health
to help. But, what exactly does that mean?
Use It Up
You can use things up instead of wasting them. Squeeze that last bit of toothpaste out of the tube. Use
the last little piece of soap. Don"t throw away any bits of the biscuit at the bottom of the box.
Wear It Out
You do not always need to have new things. Suppose your sneakers have broken laces, but they still
fit you. Repair them and wear them longer. You don"t have the latest iPhone until the old one doesn"t work
anymore. Then you can get a new one. Think twice before replacing something that still works.
Make It Do
When something you want is not on hand, look for something else that you already have to take its place.
Suppose you are packing your lunch for tomorrow and want a butter sandwich. You are out of butter. Have
a cheese sandwich instead so that you can use all of the cheese. Learn to fix broken toys instead of just
throwing them away. With a little thought, you can make something do, instead of buying something new.
Do Without
Think about all those things that you would like to have. Do you really need them? How long will you
really play with that new toy you saw on TV? Making the things that we want uses up your world"s resources(资源). And, getting rid of the things we don"t want any more takes up even more resources and space.
__________________________________________________
2. How do we deal with the last little piece of soap?
__________________________________________________
3. When do we need to get a new iPhone?
__________________________________________________
4. What should we do when something we want is not on hand?
__________________________________________________
5. What does the writer want to tell us?
__________________________________________________
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