题干

   A new keyboard can tell whether you are its owner. The keyboard records information about the typing pattern(模式)and sends it to a computer program. The program then checks to see if the pattern matches the right user. If not, an alarm sounds, and the computer locks the typist out. It locks out everyone else, even if the person knows the password. What's more, this equipment needs no batteries. It collects all the energy it needs from your actions of typing. Besides, the keyboard is also self-cleaning and the keys are free of damage from water, oil and dirt.

The keys of the new keyboard are made of the same inexpensive plastic that might be found on any other standard keyboard. But instead of being smooth, the keys have millions of tiny plastic nanowires(纳米线)on their surface area, increasing the effective contact areas between the plastics and fingers. This guarantees that there's enough power to run the keyboard as someone types.

Liming Dai, a scientist, did not work on the new keyboard, but he thinks the design could be important in getting better performance from a variety of equipment. "It could also be applied to a touch screen, for example, "Dai says. " Then smart phones and notepads could collect energy from someone's actions of typing or drawing. "

"Future work might make the keyboard even more useful, "Dai adds. " A later design might build tiny capacitors onto the nanowires, "he suggests. Capacitors are little devices that temporarily store electric charge. Those might then be LEDs to light a keyboard in the dark.

Zhonglin Wang is a co-designer of the new keyboard. His team has built a working model of the keyboard. "If a company decides to fund(资助)its production, this keyboard could be in stores in as few as two years, "says Wang.

【小题1】How does the new keyboard tell whether you are its owner?
A.By matching the typing pattern to the right user.
B.By sending alarms to a computer program.
C.By checking the right user's passwords.
D.By just recording information about the typing pattern.
【小题2】Why are there many nanowires on the surfaces of the keys?
A.To keep the keyboard free of damage.
B.To improve the speed of typing.
C.To make the keys smooth.
D.To help produce power.
【小题3】What's Dai's attitude to the new keyboard?
A.Unconcerned.B.Doubtful.
C.Positive.D.Critical.
【小题4】What is the best title for the text?
A.A New Keyboard Made of Nanowires
B.A New Keyboard Entirely Owned by You
C.A New Keyboard's Future
D.A New Keyboard Powered by Typing
上一题 下一题 0.99难度 阅读理解 更新时间:2019-08-23 09:45:59

答案(点此获取答案解析)

同类题1

   James T. Green thought he was having a panic attack.

He took a break from work to walk around the block during a stressful day, and noticed he felt out of breath climbing up a small hill. That wasn’t normal, Green thought. He had become a regular biker in recent months and wasn’t exactly out of shape. He sat down at his desk, and looked at the Apple Watch on his wrist. His heart rate was through the roof, and the Heart Watch app he was using to check his pulse was flashing warnings. Maybe it was something more serious, he thought.

Although he had blood clots(血栓)in his lungs a few years back, he had been taking medication, and doctors said that it was an unusual condition for someone in their mid-20s. Still, the symptoms this time were much less severe, and he was feeling stressed, so his mind didn’t automatically jump to blood clots. Green’s doctor told him it sounded like anxiety. But then he showed her his heart rate recorded by the Apple Watch.

“This is my normal heart rate,” Green told her, pointing to the graph in the app. “This is where my heart is now. There’s something wrong.”

The doctor ordered a CT scan. The blood clots in his left lung had returned. An ambulance rushed Green to the emergency room, where he was pumped full of blood thinners(血液稀释剂). He didn’t need surgery this time, but doctors told him that if he had waited, a clot could have killed him.

Green isn’t the only person who has discovered a serious health condition after seeing heart-rate data on a smartwatch. And he won’t be the last. Currently, smartwatches from Apple and others can tell you your heart rate and track your workouts. But these companies want to go beyond the basics by developing ways to tell you when something is wrong. In fact, it’s already happening.

【小题1】What is abnormal for Green this time?
A.He was hurt badly.
B.He breathed heavily.
C.He was out of shape.
D.He decreased physical activity.
【小题2】What really caused the severe symptoms of Green this time?
A.Tiredness.B.Anxiety.
C.Work stress.D.Blood clots.
【小题3】Which of the following confirmed his extremely serious problem?
A.He himself.B.His doctor.
C.The Apple Watch.D.The CT scan.
【小题4】What is the following paragraph going to talk about?
A.Smartwatches can help people in all aspects of life.
B.Smartwatches will replace doctors.
C.Other uses in health of smartwatches.
D.Other cases in saving lives by smartwatches.

同类题2

   Blind people can read. They do so by running their fingers along a line of raised points or dots on paper. Of course, they first have to learn the code(代码). Here are some examples of it. One dot stands for the letter “A”. Two dots side by side mean “C”. Four dots arranged to look like a box(::) stand for the letter “G”. By placing the dots in special patterns, all the letters of the alphabet can be formed.

This code was made up by a Frenchman called Louis Braille. Though he could see at birth, he became sightless when he was only three. Braille was cutting leather in his father’s shop. His knife slipped and cut his eye. Infection(感染)spread to both eyes, and he became blind.

At 10, he was placed in a home for the blind. But young Braille had great talent. He became a skilled musician and soon got a job as a church organist(风琴弹奏者)in Paris.

Because he had talent and was quick, he became a teacher at a school for the blind. While there, he heard that a captain had sent messages to his soldiers that they could read at night without light. His messages were in the simple form of raised dots and dashes. This was the clue Braille needed. At the age of 15, he worked out his own six-dot code. Each group of dots is called a cell. The cells are three dots high and two dots wide. For the rest of his life, Braille taught his young flock to read both written and musical works using his code.

For the last 17 years of his life, Braille was ill with tuberculosis. He died at the age of 43.

【小题1】What is the text mainly about?
A.Different reading methods.B.Blind people around the world.
C.How blind people communicate.D.Louis Braille and his six-dot code.
【小题2】Louis Braille developed an alphabet for blind people after he __________.
A.worked as an organistB.became blind as a young child
C.became a skilled musician in a churchD.was inspired by a captain’s messages
【小题3】The underlined word “flock” in Paragraph 4 probably refers to “____________”.
A.soldiersB.blind students
C.famous teachersD.skilled musicians
【小题4】The text is developed ______________.
A.in time orderB.in space order
C.by listing examplesD.by making comparisons

同类题3

   A solar-powered car that can be charged as it runs is being tested in Germany.

Munich-based manufacturer(制造商)Sono Motors has built the new type, named Sion, and will likely help the European powerhouse hit its national target of 1 million electric cars on the road by 2020.

Sono Motors has solar cells fixed into Sion’s bodywork, with a total of 330 solar cells built into the roof, bonnet and sides of the vehicle. These enable the vehicle’s battery to be charged when sunlight is hitting the solar cells, whether it is on the road,or parked in the sunny spot in a car park.

The solar-powered vehicle is set to be launched in Germany in 2019.

Sono Motors wants Sion to be universal and allows the car to be charged using solar energy as well as conventional outlets(电源插座), so car owners aren’t left on cloudy days.

The firm has made a 2019 date for mass production,which will be undertaken by a European manufacturer. Some 6,500 people have already placed orders for the electric vehicle. Prices for Sion tend to start from € 16,000 next year. The all-electric vehicle will offer a range of around 250 km before the battery runs out completely and it needs recharging either by solar power or using a wall plug, the company said.

Sion was designed originally as an environmentally conscious car,but will also include a number of features designed around comfort to help it compete with other modern vehicles.

“We have a seat heater, air conditioning, and a large entertainment system where I can also connect my phone, which means I really have a full vehicle,” Laurin Hahn, co-founder of the company told Reuters.

【小题1】From the third paragraph we can know that ______.
A.the car is popular on the road
B.the car has a very large battery
C.there are 330 solar cells on the car
D.where there is sunlight, Sion can be charged
【小题2】What does the underlined word in Paragraph 4 “launch” mean?
A.designB.release
C.improveD.recall
【小题3】Why does the car not break down when it is cloudy?
A.Because it is made from the rainproof material.
B.Because it can be charged by clouds on cloudy days.
C.Because it can store a great deal of energy.
D.Because it can be charged by conventional power outlets.
【小题4】What are the features of the car?
A.Modern, powerful and popular.
B.Environmental, comfortable and competitive.
C.Environmental, cheap and simple.
D.Expensive, fashionable and energy-saving.

同类题4

Safety is a huge concern whenever I run with my earphones in. But I need music to run. Otherwise all I hear is the sound of my own breathing. So I’ve found a compromise: I run with only one earphone in. The music sounds off. It’s an imperfect solution.
An updated pair of headphones, called AfterShokz, aim to do better. AfterShokz bills itself as using bone conducting technology to conduct music from the front of the ear, delivering sound through your cheekbone and inner ear. This keeps your eardrum (鼓膜) free to hear everything else.
“Earbuds (耳塞式耳机) are typically designed to block out all sound, which is fine when you’re inside. But when you’re outside, you need all your senses. It would be like sending you out cycling with a blindfold on,” says Rod Annet, managing director of AfterShokz.
Here’s where AfterShokz comes in. The headphones hook over the back of your head with the main “bud” resting high up against your cheek. This keeps your ear free to delight in other sounds.
So do they work? In a word, yes. During a 45-minute jog, they didn’t bounce or shift. I heard far more of my environment than I normally do: a nearby bike there; a runner passing me again to my left; and so forth.
What about the downsides? If you’re a huge fan of high-quality sound, you might find the headphones a bit tinny. One friend expressed concerns about missing the ability to get lost in the music as you might be distracted by other noises, although I personally didn’t find that an issue.
Yet those are all minor details. For me, probably the biggest problem is the price. Ranging between £ 49.96 to £ 83.29, AfterShokz headphones aren’t exactly cheap.
With all that considered, would I recommend them? Yes. AfterShokz headphones are quite useful. While out jogging, they were light, painless, and easy to use. They made me feel safer.
【小题1】What is special about AfterShokz headphones?
A.They are a good choice for inside use.
B.They allow users to hear other sounds.
C.They can make music sound more beautiful.
D.They can deliver sound through your eardrum.
【小题2】What does the author’s friend think of AfterShokz headphones?
A.They prevent users getting lost.
B.They deliver high—quality sound.
C.They often move while users are running.
D.They fail to allow users to enjoy the music.
【小题3】The author thinks AfterShokz headphones .
A.are too expensiveB.seem quite useless
C.make users feel painD.are too complex to use
【小题4】What is the main purpose of the text?
A.To express worries.B.To introduce a product.
C.To share a personal story.D.To complain about a product.

同类题5

   Since 1964,colleges and universities in the U. S. have used Test of English as a Foreign Language,or TOEFL,to measure an international applicant's(申请人的)level of English. Universities in English-speaking European countries began using the International English Language Testing System,or IELTS,in 1989. These two tests have been the main choices for English ability testing in higher education admissions for international students until now.

In recent years,several companies have developed new English language tests that are low-cost and easy to use. And they aim to do more than just offer greater choices in the admissions process.

Founded in 2012, Duolingo creates software that teaches users many different languages, including English. In 2014, the company launched its own test of English language ability.

Jennifer Dewar works with Duolingo, helping to develop the test. She formerly worked as an admissions official at Washington University in St. Louis, Misouri. The school is one of hundreds of colleges, universities and other organizations in and outside the U. S. that now accept the test results for international admissions into their study programs.

Dewar says Duolingo created the test to lower the barriers to higher education for people worldwide, especially those in developing countries.

TOEFL and the IELTS cost about $ 300. They are given in a limited number of centers around the world. Some test-takers have to travel to take the tests, adding to the costs. Duolingo offers its test entirely over the Internet for $ 49. All test-takers need is access to a computer with a microphone,listening device and self-facing camera.

TOEFL,the IELTS and Duolingo measure a person's English reading,listening,speaking and writing abilities. But it takes about 45 minutes to complete a Duolingo test,compared to three or four hours for TOEFL or the IELTS. It is possible because Duolingo uses artificial intelligence(人工智能)to adapt to test-takers' abilities,using fewer questions to measure their skills.

【小题1】Why were TOEFL and the IELTS set up?
A.To make people understand English-speaking countries.
B.To help teachers to teach in colleges and universities in Europe.
C.To test an international applicant's level of English.
D.To help international applicants to improve their sEnglish.
【小题2】When did Duolingo begin to use its own test of English language ability?
A.In 1964.B.In 1989.
C.In 2012.D.In 2014.
【小题3】Compared to TOEFL and the IELTS, Duolingo _____________.
A.widely used in English tests
B.a less difficult test
C.affordable and convenient
D.a face-to-face test
【小题4】What is the author's purpose in writing the text?
A.To introduce Duolingo.
B.To instruct us how to pass English tests.
C.To introduce overseas studying.
D.To promote English teaching.