Nine mini cheetahs robots appeared in the fie...

Nine mini cheetahs robots appeared in the field to show their athletic abilities. The four-legged machines, mini versions of the larger and heavier Cheetah 3, began with a warm-up run across the field.

Though they may be similar to their predecessors(原先的事物), the new four-legged machines are much more advanced. Weighing just nine kilograms, the robots can bend and swing their legs wide, giving them the ability to walk either right-side-up or upside down. They can also travel through uneven places at about twice the speed of an average person’s walking pace and quickly right themselves if kicked to the ground and perform unbelievable 360-degree backflips(后空翻) from a standing position.

Unlike the Cheetah 3, the main robots are built using cheap and easy to find parts. This means that if an arm or a motor breaks, it can be easily replaced. “If you wanted to add another arm, you could just add three or four more of these motors,” said lead developer Benjamin Katz, “You could put these parts together, almost like Legos.”

The team, which currently has ten of the four-legged machines, plans to build additional units in other university robotic labs. “A big part of why we built this robot is that it makes it easy to experiment and just try crazy things, because the robot is very strong and doesn’t break easily, and if it does break, it’s easy and not very expensive to fix, ” said Katz.

He believes that this will enable other engineers to teach the robots different skills. “Eventually, I’m hoping that we could have a robotic dog race through an obstacle course, where each team controls a mini cheetah with different ways, and we can see which strategy is more effective. That’s how you accelerate research,” said Katz.

The team’s reason for developing the robots extends beyond entertainment. They hope that someday packs of “cheetahs” will assist first respondents with search and recovery missions following natural disasters like earthquakes, work alongside firefighters, and even respond to military emergencies.

1.Which of the following best describes the mini robot?

A.Delicate. B.Portable.

C.Complex. D.Flexible.

2.Why are cheap materials used for the mini robot?

A.To test it out in other fields. B.To produce it on a large scale.

C.To make sure it’s easy to repair. D.To make people afford to buy it.

3.What’s the main purpose of making the “cheetahs”?

A.To replace firefighters. B.To entertain people in a way.

C.To bring more convenience to people. D.To help people in dangerous situation.

4.Where is the text most likely from?

A.A diary. B.A magazine.

C.A novel. D.A guide book.

高三英语阅读理解中等难度题查看答案及解析

As in the field of space travel, new technologies continue to appear in undersea exploration．They share a number of similarities with each other — as well as some important differences．

Manned submersibles （潜水器）, like spaceships, must maintain living conditions in an unnatural environment．While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water．

In exploring space, unmanned vehicles were employed before astronauts．In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles （ROVs） been put to use．

One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater．A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves．Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes．（电缆终端）

For a similar reason, knowing where you are undersea is much more difficult than in space．A spaceship’s position can be located by following its radio signal, or by using telescopes and radar．For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position．

Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity．Thus, it remains far less expensive．

1.The purpose of the passage is ______．

A．to persuade you to explore the depths of the ocean

B．to stress the importance of the undersea exploration

C．to make you believe that the undersea exploration is better

D．to tell some differences between two kinds of explorations

2.By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______．

A．unmanned vehicles were used in the beginning

B．men covered the ocean floor with stones and bricks

C．manned vehicles were employed before unmanned ones

D．men invented unmanned remote-operated vehicles in the past

3.The sonar devices must be placed ______．

A．from time to time

B．after the undersea vehicles dive

C．before the undersea vehicles dive

D．when the undersea vehicles are diving

4.What can we infer from the passage?

A．Submersibles usually break up in deep water．

B．Undersea vehicles can receive signals immediately．

C．Going to space needs power to escape the gravity．

D．Radio communications are quite difficult in a vacuum．

高三英语阅读理解中等难度题查看答案及解析

As in the field of space travel, new technologies continue to appear in undersea exploration. They share a number of similarities with each other — as well as some important differences.

Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.

In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles (ROVs) been put to use.

One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater. A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes.(电缆终端)

For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship’s position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position.

Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity. Thus, it remains far less expensive.

1.The purpose of the passage is ______.

2. By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______.

3.The sonar devices must be placed ______.

4.What can we infer from the passage?

高三英语阅读理解中等难度题查看答案及解析

After the whistle rang, the coach appeared in the field. Behind him        the team wearing black and white suits.

A．had    B．walked       C．was followed     D．led

高三英语单项填空中等难度题查看答案及解析

The vegetable looking fresh in his field ______well. It’s often sold out immediately it appears in the market.

A. has sold　　　　 B. has been sold

C. is sold　　　　 D. sells

高三英语单项填空中等难度题查看答案及解析

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

For giving all the children a fitting platform to show their gratefulness towards their loving parents, the Parents’ Day actually came into picture. This occasion is celebrated all over the world. 　 1.

USA: To support and recognize the efforts of parents in upbringing their children, the Parents’ Day had began in USA. National Parents’ Day is the important occasion for all the children of the United States to buy presents for their parents and show their love towards them. 　　 2.　　 Apart from organizing an eventful party and arrange some lovely activities, the children get the much required chance to give cards and flowers to their parents.

South Korea: 5th May is the Children’s day and 8th May is the Parents’ Day in South Korea. Therefore, it’s a very special month in South Korea. Actually celebrated as Mother’s Day, 8th May, gives the opportunity to the large mass of Korea to show respect and memorize the efforts of their parents. Carnations and flowers are given to their parents as symbols of appreciation. 　　 3.

Vietnam: Vietnam has a unique day which is known as the Parents’ Day. Parents and children enjoy the time as they assemble at a place for partaking in different lovely activities. Parents are given a much needed break from their daily chores. 　　 4.　　 This is the chance parents of the country wait for. It’s, however, not a National Holiday in Vietnam but it’s a time for the Vietnamese to gift flowers and cards to parents.

5.　　 . The date of the Parents’ Day, nevertheless, is different in different countries but motives and purpose of celebrating the day is the same all over the world.

A.　 And the Parents’ day is increasingly popular all over the world.

B.　 The Parents’ Day is celebrated to recall the sacrifices and compromises of the parents.

C. They get the opportunity to go out for the lunch and dinner along with their children.

D.　 A quality time is spent together for conveying a message of love and expressing gratitude to the parents.

E.　 Children will invite their friends and relatives to celebrate this special day.

F.　 But it’s not celebrated everywhere on the same day.

G.　 It’s a rare opportunity for them to grasp.

高三英语七选五中等难度题查看答案及解析

—Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copper Field with you.

— _____ Who knows when he will be back here again?

高三英语单项填空简单题查看答案及解析

The following safety risks may result in serious injury or death to the user of the MINI Cooper S:

This product contains small parts that are for adult assembly (组装) only. Keep small children away when assembling. Remove all protective materials before assembly. Be sure to remove all packaging materials and parts from underneath the car body.

Battery posts contain lead known to the state of California to cause cancer and reproductive harm. Never open the battery.

Body parts such as hands, legs, hair and clothing can get caught in moving parts. Never place a body part near a moving part or wear loose clothing while using the vehicle. Always wear shoes when using the vehicle.

Using the vehicle near streets, motor vehicles, drop-offs such as steps, water (swimming pools) or other bodies of water, hills, wet areas, in alleys, at night or in the dark could result in an unexpected accident. Instead, use the vehicle on the highway. Always use the vehicle in a safe, secure environment.

Using the vehicle in unsafe conditions such as snow, rain, loose dirt, mud, or sand may result in unexpected action, for example tip over.

Using the vehicle in an unsafe manner. Examples include but are not limited to:

Pulling the vehicle with another vehicle or similar device

Allowing more than two riders

Pushing the user from the back

Traveling at an unsafe speed

Always use common sense and safe practices when using the vehicle.

Store the vehicle indoors or cover it to protect it from weather. Water will damage the motor, electric system, and battery.

1.When assembling, you should ________.

A. open the battery on the spot

B. ignore the packaging materials

C. keep small children off the spot

D. take away all protective materials

2.According to the text, it is safer to ________.

A. have at least four passengers

B. push the user from behind at the start

C. drive on the highway instead of on hills

D. wear loose clothes while using the vehicle

3.Where can you probably find the text?

A. An official report.            B. A popular magazine.

C. A physics textbook.            D. A product handbook.

高三英语阅读理解中等难度题查看答案及解析

A robot designed to carry things moves quickly across a field to gather equipment at a sports event. Such equipment, like javelins and discuses (铁饼), has been thrown by competitors. Another robot moves a human-sized screen on wheels. It is designed to permit virtual attendance at the event. And then there are the robots designed to look like the smiling, friendly creatures or mascots that act as the Olympic Games’representatives.

All these robots are part of preparations for the 2020 Olympic Games in Tokyo, Japan. Japanese carmaker Toyota Motor Corporation presented the machines to reporters earlier this week. Toyota is a major supporter of the 2020 Olympic Games.

The mascot robots have moving arms and legs, and their eyes change to the image of stars and hearts. They cannot speak at all or walk very well. But Tomohisa Moridaira, lead engineer, suggested several possibilities, such as getting the robot to hold the Olympic torch using magnets.

The field support robot" is a small bus-shaped machine based on a Toyota ride-sharing vehicle that is still in development. The field support robot can travel as fast as 20 kilometers per hour. It holds three cameras and one special sensor that lets it surroundings. Around the top of its body are special lights that brighten when the vehicle is active. Its artificial intelligence helps it avoid barriers. It is also able to vary its path in order to protect areas of grass.

However, it cannot find the objects, which can weigh up to eight kilograms, or pick them up on its own. A person has to travel with the device, pick up the objects and put them in it. Then, with a press of a button, the vehicle transports the equipment to where it needs to go.

Takeshi Kuwabara took charge of the robots’ development. He said it was designed to team robots and humans. "Our aim was to leverage the strengths of both humans and robots," he said.

The carmaker plans to use the games to present its new vehicle technologies. These include buses fueled by a special kind of battery, and self-driving taxis. Toyota is competing with other carmakers and technology companies to develop low cost , robot-controlled cars and electric vehicles.

1.Why does the author mention robots in the first paragraph?

A.To attract our interest in robot technology.

B.To show us new robot technology in the 21st century.

C.To encourage creation of new robots.

D.To introduce the robots in the Olympic Games.

2.What is the feature of the "field support robot"?

A.It can work individually in the field.

B.It can sense barriers and change its way.

C.It is a Toyota ride-sharing vehicle.

D.It can find and pick up anything.

3.What is the purpose of the carmaker to use many robots in the Olympic Games?

A.To show its new vehicle technologies.

B.To help save the natural resources.

C.To cut down the cost of the service.

D.To free people from heavy work.

4.What can be the best title of the passage?

A.Robot Shows in the 2020 Olympics.

B.Toyota's - Support for the 2020 Olympics.

C.Robot Assistants in the 2020 Olympics.

D.Robot Competition in the 2020 Olympics.

高三英语阅读理解中等难度题查看答案及解析

Some parents want their children to show complete ________ to their wishes, which is harmful to their kids’ character building.

A.submission B.addiction C.limitation D.admission

高三英语单项填空中等难度题查看答案及解析