题目
题型：北京模拟题难度：来源：
instead of driving my car? Do I ever play sports for fun? Do I ever take the stairs instead of the elevator? If
you answered no to any or all of the above questions, you are probably out of shape and need to start a fitness
program.
Exercise is very important. It improves your strength and blood circulation (循环). It gives you more
energy. It can help you relax and sleep well, and it can help control your weight. In fact, the U. S. Surgeon
General says that exercise can help prevent heart disease, diabetes, obesity, and osteoporosis (a disease that
weakens the bones).
The first step is to make a program. A good fitness program should be fun. It should involve (包含) both
your arms and your legs, and it should help you to build endurance(the ability to do exercise for a long time).
To make a good program for yourself, first you should think about the types of activities you like to do, what
you think you are able to do, and when you will have time to do it. A good exercise program will involve
cardiovascular activities, such as running, biking, swimming, roller skating, playing soccer or tennis, or
jumping rope. It will also involve weight-bearing exercise, such as weightlifting, and stretching activities.
Also, daily, low-intensity activities such as walking, gardening, dancing, and climbing stairs are good for your
physical health.
So what are you waiting for? Cet off of the sofa and start exercising. Sign up for yoga, tai chi, or pilates.
Join a gym or a running club, or just start walking a half an hour every day. Every little bit helps!
B. a good exercise program should be exciting
C. exercise can help you control your weight
D. it" s not necessary to make an exercise program
B. three
C. four
D. five
B. jumping rope
C. weightlifting
D. climbing stairs
B. A good exercise program can help you a lot to keep healthy.
C. Exercise can improve your strength and blood circulation.
D. Start to make an exercise program when you are out of shape.
答案
核心考点
试题【阅读理解。 Are you in shape? To find out, ask yourself some questions: Do I exerc】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
something in common: they all need energy to work. Energy has many different forms. One form, electricity,
comes mostly from steam-powered generators (蒸汽发电机). Steam is made by buming coal, oil, or natural
gas. Gasoline(汽油) is another form of energy. Casoline is made from oil. Oil has many other uses. Paints,
fertilizers, and plastics are made from it. We even use it to heat buildings. Coal, oil, and gas are natural
resources (资源). We take them from nature to make our lives easier.
We can classify (分类) natural resources as either renewable or nonrenewable. Coal, oil, and gas are
nonrenewable. They take millions of years to form. Some scientists predict that we will run out of oil and
gas in 50 to 100 years. Coal is more plentiful. So it may last for hundreds of years. Resources such as wood
and water are renew- able. They can be grown or recycled naturally. They can, however, become limited
from overuse.
We have developed some altemate (替代的) sources of energy. But these sources have disadvantages. For
example, hydroelectric power, or energy from running water, affects the ecology (生态) of surrounding areas.
Nuclear power (核电), another altemate source, presents the threat (威胁) of nuclear accidents. There are also
problems related to the storage (储存) of nuclear wastes. Solar and wind energies aren"t consistent. We can"t
depend on them. Geothermal energy, caused by heat from inside the earth, is tapped by drawing steam and
hot water from pools and geysers. This energy source, like most others, isn"t fully developed.
It"s time to get serious about energy. We must find practical, alternate energy sources. If we wait too long,
it will be too late. We will run out of coal, oil, and natural gas. Then we won"t have the resources to make
altemate energy sources.
________________________________________
2. How long may coal last according to the passage?
________________________________________
3. Why are wood and water renewable resources?
________________________________________
4. What can be problems with nuclear power?
________________________________________
5. What"s the main idea of the passage?
________________________________________
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.
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.
最新试题
- 1下列各项中，动物细胞和植物细胞的主要区别是，动物细胞内没有（ ）A．细胞膜B．叶绿体C．细胞核D．细胞质
- 2下列文学常识，有错误的一项是（ ）A．《静静的顿河》、《一个人的遭遇》的作者是苏联作家肖洛霍夫，他曾于1965年荣获
- 3当火车来临时，车站管理员要求候车乘客站在安全白线以外．这是因为：火车驶过时，靠近火车的地方空气流速______（选填“大
- 4解方程：x-4x-3+2=43-x．
- 5从B栏中找出与A栏相对应的答语。A( )1. Hello! ( )2. Good after
- 6【题文】选出对加横线的词解释错误的项（单选题）①怀其璧，从径道之（路，道路）
- 72011年3月1日，中共中央政治局常委、中央书记处书记、中央党校校长***出席中央党校春季学期开学典礼并讲话指出，我们党
- 8原子序数小于36的四种元素X、Y、Z、W，有关它们的信息如下表所示：元素部分结构知识部分性质XX原子核外电子排布在三个能
- 9下列大洲中，被太平洋、大西洋、北冰洋包围的是A．非洲B．大洋洲 C．亚洲 D．北美洲
- 10近段时间以来，“光盘行动”风靡全国，这个现象说明A．艰苦奋斗意味着过苦行僧的生活B．当前一段时期需要艰苦奋斗C．这只是一
热门考点
- 1国际金融危机爆发后，发达国家与发展中国家几乎毫无例外地采用凯恩斯主义政策应对危机。凯恩斯主义在解决市场有效需求不足、使资
- 2根据所给的解释写出相应的成语。（1）使人听了非常吃惊。（ ）（2）别人说什么，自己也跟着说什
- 3阅读下面的文字，完成6～8题。高强度新型碳纳米管纤维研制成功英国剑桥大学材料科学教授阿兰·魏德尔与美国陆军士兵研究开发中
- 4下列关于民主和专政的关系说法正确的有( )①民主与专政相辅相成、互为前提 ②民主是专制的基础，专制是民主的保障 ③对一
- 5在白炽灯的照射下，能从捏紧的两块玻璃板的表面看到彩色条纹．这种现象属于（ ）A．光的单缝衍射B．光的薄膜干涉C．光的
- 6超声波对物体有很强的“破碎”能力，它能将一般情况下不能混合的液体（如油和水）混合在一起，这表明超声波能传递____；而超
- 7科学研究表明，不少化学反应都具有可逆性，即正向反应和逆向反应都能同时进行．（1）一定条件下，当可逆反应的正反应速率与逆反
- 820世纪初，人们曾利用氧气密度比空气小得多这一物理性质，用氢气充灌飞艇，实现了人类在天空中飞翔的梦想，后来，因为氢气具有
- 9某兴趣小组在学习CaCO3时，查阅到某化工厂的生产流程如所示：④注：反应④CO2+H2O+Na2CO3═2NaHCO3（
- 10下列通式只表示一类物质的是( )A．CnH2n+2B．CnH2nC．CnH2n-2D．CnH2n-6