Scientists have been experimenting with four-...

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.

九年级英语阅读理解困难题查看答案及解析

People have been interested in robots for quite some time. Scientists are always inventing new and better robots. It is known that robots p　 1.　　 an important role in our lives.

First of all, in real life, robots are m　 2.　 used in factories. They do many different jobs. They always do all the d　 3.　　 , difficult and heavy work, and help out in h　 4.　　 , schools and offices. The use of robots can i　 5.　　 the working conditions for people.

Secondly, smarter robots will help us w 6.　　 the housework. They can do jobs such as preparing meals, washing dishes, s　 7.　 the floor. Therefore, we will have more time to do w 8.　　 we want to do.

Thirdly, robots will be our f　 9.　　 . When we feel sad, lonely or happy, we can have a chat with a robot. Robots will not only be good listeners but also offer us good a 10.　 .

In a word, robots will be more and more intelligent (聪明) and affect our lives in many ways.

九年级英语单词拼写困难题查看答案及解析

Since the 1970s, scientists have been searching for ways to connect the brain with computers. Braincomputer interface(BCI) technology could help people with disabilities send commands to machines.

Recently, two scientists, Jose Millan and Michele Tavella from the Federal Polytehnic School in Lausanne, Switzerland, show a small robotic wheelchair directed by a person’s thoughts.

In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.

“Our brain has billions of body cells(细胞). These send signals through the spinal cord(脊髓) to the body part to give us the ability to move. But spinal cord injuries(脊柱受伤) or other conditions can prevent these weak electrical signals from reaching the body part.” Tavella says. “Our system allows disabled people to communicate with outer world and also to control machines.”

The scientists designed a special cap for the user. This head cover picks up the signals from the scalp(头皮) and sends them to a computer. The computer finds meanings of the signals and commands the wheelchair with an engine. The wheelchair also has two cameras that tell objects in its path. They help the computer react to commands from the brain.

Prof. Millan , the team leader, says scientists keep improving the computer software that finds meanings of brain signals and turns them into simple commands.” The practical possibilities that BCI technology offers to disabled people can be grouped in two kinds: communication, and controlling objects. One example is this wheelchair.”

He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can get advantages from. And the other is sure that they can use the technology for long.

1.BCI is a technology that can________.

A. help to make computer systems more modern

B. connect the human brain with computers

C. help the disabled to be healthier

D. control a person’s thoughts

2.Which of the following shows the path of the signals described in Paragraph 5?

A. scalp→computer→cap→wheelchair

B. computer→cap→scalp→wheelchair

C. scalp→cap→computer→wheelchair

D. cap→computer→scalp→wheelchair

3.The team will test with real patients to_________.

A. make money from them

B. prove the technology useful to them

C. make them live longer

D. learn about their physical condition

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

A. Switzerland, the BCI research Center

B. New Findings About How the Human Brain Works

C. BCI Could Mean More Freedom for the Disabled

D. Robotic Vehicles Could Help to Cure Brain Sickness

九年级英语阅读理解中等难度题查看答案及解析

Since the 1970s, scientists have been searching for ways to connect the brain with computers. Braincomputer interface(BCI) technology could help people with disabilities send commands to machines.

Recently, two scientists, Jose Millan and Michele Tavella from the Federal Polytehnic School in Lausanne, Switzerland, show a small robotic wheelchair directed by a person’s thoughts.

In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.

“Our brain has billions of body cells(细胞). These send signals through the spinal cord(脊髓) to the body part to give us the ability to move. But spinal cord injuries(脊柱受伤) or other conditions can prevent these weak electrical signals from reaching the body part.” Tavella says. “Our system allows disabled people to communicate with outer world and also to control machines.”

The scientists designed a special cap for the user. This head cover picks up the signals from the scalp(头皮) and sends them to a computer. The computer finds meanings of the signals and commands the wheelchair with an engine. The wheelchair also has two cameras that tell objects in its path. They help the computer react to commands from the brain.

Prof. Millan , the team leader, says scientists keep improving the computer software that finds meanings of brain signals and turns them into simple commands.” The practical possibilities that BCI technology offers to disabled people can be grouped in two kinds: communication, and controlling objects. One example is this wheelchair.”

He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can get advantages from. And the other is sure that they can use the technology for long.

1. BCI is a technology that can________.

A.help to make computer systems more modern

B.connect the human brain with computers

C.help the disabled to be healthier

D.control a person’s thoughts

2.Which of the following shows the path of the signals described in Paragraph 5?

A.scalp→computer→cap→wheelchair

B.computer→cap→scalp→wheelchair

C.scalp→cap→computer→wheelchair

D.cap→computer→scalp→wheelchair

3.The team will test with real patients to_________.

A.make money from them

B.prove the technology useful to them

C.make them live longer

D.learn about their physical condition

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

A.Switzerland, the BCI research Center

B.New Findings About How the Human Brain Works

C.BCI Could Mean More Freedom for the Disabled

D.Robotic Vehicles Could Help to Cure Brain Sickness

九年级英语阅读理解中等难度题查看答案及解析

Since the 1970s, scientists have been searching for ways to connect our brain with computers. Brain-Computer Interface (BCI) technology could help people with disabilities send commands(指令)to machines.

Recently two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne. Switzerland, showed us a small robotic wheelchair directed（指挥）by a person’s thoughts.

In the laboratory. Tavella operated the wheelchair just by thinking about moving his left or right hand “Our brain has billions of cells（细胞）. These send signals（信号）through the spinal cord（脊髓）to the muscles（肌肉）to give us the ability to move. But some injuries or other conditions can stop these weak electrical signals from reaching the muscles.” Tavella says. “Our system allows disabled people to communicate with outside world by controlling the machines with thoughts.”

The researchers designed a special cap for the user. It picks up the signals from our brain and sends them to a computer. The computer gets the signals and starts to command the wheelchair after a short while.

Prof. Millan, the team leader, says scientists keep improving the computer software that gets brain signals and turns them into simple commands. “The practical possibilities that BCI technology offers to disabled people can be grouped in two kinds: communication, and controlling machines. One example is this wheelchair.”

He says his team has set a main goal. That is to test with real patients, so as to prove that this is such a technology they can benefit（获益）from.

1.BCI is a technology that can __________.

A. help the disabled to be healthy again　　 B. help to improve computers

C. control a person’s thoughts　　 D. connect human brain with computers

2.Which of the following shows the right path（途径）of the signals described in Paragraph 4?

A. brain→computer→cap→wheelchair　　 B. computer→cap→brain→wheelchair

C. cap→omputer→brain→wheelchair　　 D. brain→cap→computer→wheelchair

3.Prof. Millan’s team will test their products with real patients to __________.

A. make them live longer　　 B. prove that the technology is useful to them

C. learn about their physical conditions　　 D. have a better understanding of computers

4.The best title of this passage might be __________.

A. Switzerland, the BCI Research Center

B. New Findings about How the Human Brain Works

C. BCI Could Mean More Freedom for the Disabled

D. BCI Could Help to Cure Brain Injuries

九年级英语阅读单选中等难度题查看答案及解析

A robot named Stevie has been designed to communicate ________ old people.

A.to B.with C.for D.after

九年级英语单选题简单题查看答案及解析

For hundreds of years, scientists have been trying to answer what things have an influence on people’s emotions. What your feeling is always controlled by many things. Your emotions can be influenced by your personality (个性), by the actions of others and by events around you. Perhaps you don’t know your emotions can be influenced by the weather as well.

People often say they feel good when the sun is shining and sad when it is cloudy. In fact, sunlight makes us feel good. When sunlight hits our skins, our bodies produce a vitamin(维生素）. Vitamins are natural chemicals which we all need to stay healthy. Sunlight helps our bodies produce vitamin D. Vitamin D helps our bodies make a special chemical. This special chemical influence our brains and makes us feel happy. For example, there are long, dark winters of little sunlight in Sweden and Norway, so many people in these countries often feel sad. Without much sunlight, their bodies produce less vitamin D. Without enough vitamin D, their bodies make less ofthis special chemical which makes them feel good. To help the people in these countries feel better, special“sunrooms”with man-made lights have been built. People can go there and get “sunlight” for an hour or two.

The weather can also influence people’s emotions in other ways. Hot weather can make people angry because people feel uncomfortable when they are hot. In the same way, rain can make people angry because being wet can be unpleasant. As you can see, the weather can have an effect on the chemicals which control our brains. Through these ways, the weather can influence our emotions. Sadly, while the weather can change us, we can hardly change the weather.

1. Which of the following can bet described as a factor(因素) that can influence one’s emotions?

A. Weather.　　　　　　 B. Actions of others.

C. Personality　　　　 D. A, B and C.

2.What’s the meaning of the underlined word “emotions” in Chinese?

A. 运动　　　　　　　 B. 情绪　　　　　　　　　　　　 C. 感动　　　　　　　 D. 激动

3.Which of the following is TRUE about vitamin D according to the passage?

A.　 It is a kind of man-made chemical.

B.　 It makes us worried by influencing our brains.

C.　 It is needed by us all to keep fit.

D. It is in the sunlight.

4.What may be the best title for this passage?

A.　 Why Do We Feel Sad.

B.　 The Weather Influences People’s Emotion.

C.　 People Need More Vitamin D.

D.　 We Can Hardly Change the Weather.

九年级英语阅读理解中等难度题查看答案及解析

For hundreds of years, scientists have been trying to answer what things have an effect on people’s emotions. How you feel is controlled by many things. Your emotions can be affected by your personality, the actions of others and the events around you. Perhaps you don’t know your emotions can be influenced by the weather as well.

People often say they feel good when the sun is shining and sad when it is cloudy.

In fact, sunlight makes us feel good. When sunlight hits our skins, our bodies produce a vitamin. Vitamins are chemical substances ( 化学物质) which we all need to stay healthy.

Sunlight helps our bodies produce vitamin D. Vitamin D helps our bodies make a special chemical substance. This special chemical substance affects our brains(大脑) and makes us feel happy. For example, there are long, dark winters of little sunlight in Sweden and Norway, so many people in these countries often feel sad. Without much sunlight, their bodies produce less vitamin D. Without enough vitamin D, their bodies make less of this special chemical substance which makes them feel good. To help the people in these countries feel better, special “ sunrooms” with artificial( 人造的) lights have been built.

People can go there and get “ sunlight” for an hour or two !

The weather can also affect people’s emotions in other ways. Hot weather can make people angry because people feel uncomfortable when they are hot. In the same way, rain can make people angry because being wet can be unpleasant. As you can see, the weather can have an effect on the chemical substances which control our brains. Through these ways, the weather can inflience our emotions. Sadly , while the weather can change us, we can hardly change the weather.

九年级英语阅读理解中等难度题查看答案及解析

For hundreds of years, scientists have been trying to answer what things have an effect on people’s emotions. How you feel is controlled by many things. Your emotions can be affected by your personality, by the actions of others and by events around you. Perhaps you don’t know your emotions can be influenced by the weather as well.

People often say they feel good when the sun is shining and sad when it is cloudy. In fact,　　　 sunlight makes us feel good. When sunlight hits our skins, our bodies produce a vitamin. Vitamins are natural chemicals (化学物质) which we all need to stay healthy. Sunlight helps our bodies produce vitamin D. Vitamin D helps our bodies make a special chemical. This special chemical affects our brains and makes us feel happy. For example, there are long, dark winters of little sunlight in Sweden and Norway, so many people in these countries often feel sad. Without much sunlight, their bodies produce less vitamin D. Without enough vitamin D, their bodies make less of this special chemical which makes them feel good. To help the people in these countries feel better, special “sunrooms” with artificial (人造的) lights have been built. People can go there and get “sunlight” for an hour or two!

The weather can also affect people’s emotions in other ways. Hot weather can make people angry because people feel uncomfortable when they are hot. In the same way, rain can make people angry because being wet can be unpleasant. As you can see, the weather can have an effect on the chemicals which control our brains. Through these ways, the weather can influence our emotions. Sadly, while the weather can change us, we can hardly change the weather.

1.Which of the following is NOT mentioned as a factor that can affect one’s emotions?

A. Weather.　　　　　　　　　　 B. Actions of others.

C. Personality.　　　　　　　 D. Age.

2.Which of the following is true about vitamin D according to the passage?

A. It is a kind of artificial chemical.

B. It makes us worried by affecting our brains.

C. It is needed by us all to keep fit.

D. It is in the sunlight.

3.What can we infer from the passage?

A. We feel good when we are in the bright cool weather.

B. We will be happy when we are caught in the rain.

C. All people in Norway and Sweden feel sad in winter.

D. The more vitamin D you have, the happier you’ll be.

4.What may be the best title for this passage?

A. Why Do We Feel Sad?

B. The Weather Influences People’s Emotions

C. People Need More Vitamin D

D. We Can Hardly Change the Weather

九年级英语阅读理解中等难度题查看答案及解析

For hundreds of years, scientists have been trying to answer what things have an effect on people’s emotions (情感). How you feel is controlled by many things. Your emotions can be affected by your personality, by the actions of others and by events around you. Perhaps you don’t know your emotions can be influenced by the weather as well.

People often say they feel good when the sun is shining and sad when it is cloudy. In fact, sunlight makes us feel good. When sunlight hits our skins, our bodies produce a vitamin. Vitamins are natural chemicals (化学物质) which we all need to stay healthy. Sunlight helps our bodies produce vitamin D. Vitamin D helps our bodies make a special chemical. This special chemical affects our brains (大脑) and makes us feel happy. For example, there are long, dark winters of little sunlight in Sweden and Norway, so many people in these countries often feel sad. Without much sunlight, their bodies produce less vitamin D. Without enough vitamin D, their bodies make less of this special chemical which makes them feel good. To help the people in these countries feel better, special “sunrooms” with artificial (人造的) lights have been built. People can go there and get “sunlight” for an hour or two!

The weather can also affect people’s emotions in other ways. Hot weather can make people angry because people feel uncomfortable when they are hot. In the same way, rain can make people angry because being wet can be unpleasant. As you can see, the weather can have an effect on the chemicals which control our brains. Through these ways, the weather can influence our emotions. Sadly, while the weather can change us, we can hardly change the weather.

1.Which of the following is NOT mentioned as a factor (因素) that can affect one’s emotions?

A. Weather.　　　　　　　　　　　　　　　　　　　 B. Actions of others.

C. Personality.　　　　　　　　　　　　　　　 　　 D. Age.

2.Which of the following is true about vitamin D according to the passage?

A. It is a kind of artificial chemical.

B. It makes us worried by affecting our brains.

C. It is needed by us all to keep fit.

D. It is in the sunlight.

3.What can we infer (推断) from the passage?

A. We feel good when we are in the bright cool weather.

B. We will be happy when we are caught in the rain.

C. All people in Norway and Sweden feel sad in winter.

D. The more vitamin D you have, the happier you’ll be.

九年级英语阅读理解中等难度题查看答案及解析