阅读理解 Scientists have been experimenting with four-leg robots for years. They want to use robots to carry heav...

题型：阅读选择题类：模拟题难易度：普通

浙江杭州滨江区2017年九年级英语中考第二次模拟考试

阅读理解

Scientists have been experimenting with four-leg robots for years. They want to use robots to carry heavy things over difficult land.

But providing enough power for those kinds of robots has been a problem. Now, that has changed. Engineers at MIT have designed a running robot that runs on batteries. Scientists say their robots will soon be able to run like cheetahs, the fastest land animals on Earth.

One difficulty in designing these types of robots continues to be providing power. These machines are still quite heavy and they need a lot of power to run. But the cheetah-like robot designed by engineers at MIT is light enough m run on batteries. The robot weighs just 30 kilograms. The robot needs only about 700 watts of power to run. This robot can actually jump 40cm high and it can land very safely and then it can run. The robots limbs and other parts were made in a three-dimensional or 3D printer. A strong, light-weight material called Kevlar is used to make the robot's part stronger.

But the development of MITs robot is not without its own set of problems. The robot's limbs must support heavy force, and sometimes they break.

Scientists say the new technologies used on this robot may be used in the making of limbs for disabled persons and other machines. Some of those machines may help save humans from performing difficult and dangerous jobs.

（1）、What is the challenge in designing the four-leg robots?

A、carrying heavy things B、Running fast. C、Being light enough. D、Providing enough power.

（2）、What can the new technologies on MIT's robot be used for?

A、For making a 3D printer. B、For making limbs for disabled persons. C、For helping people do housework. D、For helping people live longer.

（3）、From the passage, we know that MIT's robot .

A、can carry heavy things B、can jump 30cm high C、is made of Kevlar D、is still very heavy

（4）、What's the main idea of this passage?

A、Scientists have been working on four-leg robots. B、A new robot has been designed by engineers at MIT. C、The robots can help us do difficult and dangerous jobs. D、The difficulty in designing the new robot.

举一反三

    Do you know why you sleep? You may think it's because you're tired. Or perhaps you've been told sleep is good for you. Yet no one knows exactly why or how people sleep.
    Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers' eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers' eyes did not move he called non-REM sleep.
    Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers' pulses（脉搏）went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don't know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day's garbage.
    One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.

Taking away a city's rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can't eat or use. If we kept these things we would soon have a mountain of rubbish.
In some cities the rubbish is collected and taken outside of the city to a dump(垃圾站). Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used water from toilets, bathtubs(澡盆) and other places.
To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you'd never know that this had once been an old rubbish dump.
In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly change into something called humus(腐殖土), which looks like black earth. It is rich with kinds of things that feed plants and help make them grow.

阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项。

We humans produce a lot of waste every day．We pour it onto the environment．This waste often gives off gases and dusts into the air．Often．it is harmful both to nature and to our human life．

Do you know one of the main causes of the large amount of dangerous waste? It is people who do not realize how big a problem it is．Because it can be simply removed and sent to a landfill(废渣填埋场)．The problem is often believed to end there．In addition，industries are not willing to find ways to deal with the dangerous waste．They think it will cost money．Many industries and governments build simple landfills to store waste．They often just pour waste chemicals into nearby bodies of water．Often，the chemicals used for industrial production cause dangerous forms of waste．The amount of these chemicals has increased greatly in the past．It is often difficult and expensive to get rid of them．It is also hard to store them in a safe way．

Every year, major health problems result from dangerous waste．Sadly, often only after someone has died or become seriously ill，and then the governments will take measures to reduce the levels of harmful waste．

Some governments have realized how serious the dangerous waste problem is．They are now trying to solve this problem．They are also trying to limit the amount of waste industries．

Not only governments but ordinary people must work together to solve the problem．We can choose not to buy those products which produce dangerous waste．Many scientists think waste can be reduced at least one third by using technologies and methods．

阅读理解

As we know,more and more teenagers are beginning to somke.It seems that young people think smoking is very cool.There are many reasons for this,for example,films.Many actors smoke in the films and this can lead teenagers to think smoking can be cool.Many young people believe that smoking makes them look cool.It's probably true that smoking helps them look older.Doctors say that not only sugar and alcohol but also smoking is bad for your skin.Do you really want to see wrinkles on your face at a young age?Do you really think that smoking will make you as cool as you think?Do you really believe that he or she will like someone that smells like a factory?This is simply a bad idea.Besides causing cancer,smoking will also make you ugly and sad.

Therefore,boys and girls ,forget about smoking!Don't even start.If you are smoking,give it up as quickly as possible.Why not live a healthy life without smoking?

阅读下列材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

Teenagers are known for being creative and full of new ideas. Let's have a look at these teenage inventions that might change the world.

Banana leaves usually go bad in two or three days. Tenith Adithyaa, a teenager from India, used UV to make the leaves stay fresh for a year. Tenith thinks that one day the leaves will be used for making plates, cups and other things.

David Cohen, an American teenager, built an earthworm(蚯蚓) robot. It is able to go into the smallest places, where humans or dogs can't go. It will be used for finding people in a fire or an earthquake.

Remya Jose, a 14-year-old from India, found it tiring and boring to handwash clothes in the nearby river. She reused some bicycle parts and created a washing machine that saves time, energy and keeps people fit at the same time.

Kenneth Shinozuku, a 15-year-old from New York, noticed that his grandfather who got Alzheimer's disease（老年痴呆） would often leave home and get lost. So he invented the wearable sensors(感应器)to help people find their family members like his grandfather.

阅读下列材料，从A、B、C、D四个选项中选出最佳答案。

New Science and Technology

Look carefully before you cross

The city of Daye in Hubei Province is using new technology to stop people from crossing against red lights. The city has set up special posts (杆) on its sidewalks. The posts can recognize (识别) human faces. If they catch a person crossing at a red light, they will send water drops at him or her.

High-tech building

China not only builds things quickly, but also tries to use new and high technology. About twelve years has passed since the opening of the Qinghai-Tibet Railway. About 550 kilometers of the railroad runs over ice-covered earth. When the ice-covered earth gets warm during summer, it can make the railway move. Chinese scientists built special structures to solve this problem.

Musical road in Holland (荷兰)

In a village of Holland, there is a musical road. With the help of something special, the road can play a song. But if a car drives at a speed of over 60 km/h, the sound will become noisy. The local government thinks it will encourage drivers to control the speed. They will have to slow down in order to hear the song instead of the noise.

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