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
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同类题1

   A new tool of communication called the "drift diary" is doing the rounds among young college graduates.

The "drift diary", like those ancient paper messages put into a bottle left to drift on the high seas to reach hundreds of miles away, connects lonely hearts. It was first started by a Beijing woman, who goes by the screen name Little S, in 2007.It has become the preferred tool of communication among youngsters afraid to reveal their innermost self to peers, but wanting to share their lives with others. The way it works is that the initiator(发起人)of the diary mentions it on popular Internet forums such as Tianya and Douban. Those wanting to react or otherwise add to the diary then send their real names and addresses to the initiator via e-mails or text messages.

The numbers in one group are usually restricted to between 30 and 50. The diary then is passed on to another by the express delivery or personal handover. The diary writers are mostly anonymous(匿名的)but if they wish to reveal their identity they can do so by posting their contact information at the end of their postings.

The diary writers not just add words but also decorate the plain notebooks with cartoons, drawings or even dress it up with a ribbon or a new cover. Interesting experiences, travel journals, the simple joys of everyday living or sweet recollections of childhood, all find a place in these diaries. Most often, though, the writers set down their frustrations and predicaments.

It usually takes one year for a diary to return to the initiator. The last recorder is the luckiest one, with access to all previous entries, while others can request photocopies of them from the diary's initiator.

【小题1】Why is the "drift diary" popular among youngsters?
A.Because they hate using the Internet.
B.Because they like to show themselves to peers.
C.Because they want to share their lives with strangers.
D.Because they find it fashionable to be a diary writer.
【小题2】Which one shows the correct way a drift diary works?
①The diary then is passed on between the recorders.
②The diary returns to the initiator.
③The initiator of the diary makes a mention online.
④Participants request photocopies of the diary from the diary's initiator.
⑤Those who want to participate in the program get in touch with the initiator.
A.③⑤①④②B.③⑤①②④
C.④⑤①②③D.①③⑤②④.
【小题3】What does the underlined word "predicaments" in the last but one paragraph probably mean?
A.Successful experiences.B.Sense of achievement.
C.Difficult situations.D.Favorable conditions.
【小题4】Which of the following can be used as the best title for the passage?
A.Drift Diary——A New Tool of Communication
B.How a Drift Diary Works
C.Share Your Lives with Strangers
D.The Diary Passed on

同类题2

It is proved that a young scientist named Will Smith has invented a kind of advanced and intelligent robot. The small robot may help children who are ______ from a long-term illness in hospital or at home.
Whoever has had a long-term illness knows that recovering at home can be ________, as everyone can’t keep them ________, especially when their family go out to work. These children may feel _______ from their friends and classmates, which can be particularly ________ of children. They may feel ________. Now these children may have a high-tech friend to help ________ the sense of loneliness. The friend is a robot, which takes their _______ at school. Through the robot, the children can _______ teachers and classmates. They ______ participate in class from _______ they are recovering. Mr. Smith, the inventor ________ how it works. He says the child uses a tablet or phone to start the robot. Then the _______ uses the same device to control the robot’s movements at school, the robot becomes the ears and _______ of the child, so that he or she can take part in classroom activities—________ you’re at home or from a hospital bed. The robot is ________ with microphones that makes ________ easy. It will become ________ to the public, for not only does it look simply cool but people can afford it. ________, it will help some children feel ________ lonely while they are absent from class.
【小题1】
A.sufferingB.recoveringC.escapingD.varying
【小题2】
A.lonelyB.frustratingC.painfulD.desperate
【小题3】
A.secretB.harmonyC.watchD.company
【小题4】
A.tiredB.freeC.separateD.banned
【小题5】
A.trueB.simpleC.meaningfulD.right
【小题6】
A.picked outB.taken inC.left outD.broken down
【小题7】
A.promoteB.reduceC.improveD.form
【小题8】
A.turnB.chanceC.placeD.order
【小题9】
A.hearB.seeC.feelD.smell
【小题10】
A.stillB.evenC.everD.just
【小题11】
A.whereverB.howC.wheneverD.why
【小题12】
A.analysesB.stressesC.defendsD.explains
【小题13】
A.childB.robotC.teacherD.parent
【小题14】
A.handsB.mouthC.eyesD.feet
【小题15】
A.untilB.unlessC.whetherD.since
【小题16】
A.equippedB.decoratedC.occupiedD.covered
【小题17】
A.movementsB.communicatingC.attendanceD.understanding
【小题18】
A.reliableB.avoidableC.flexibleD.available
【小题19】
A.SurprisinglyB.HopefullyC.StrangelyD.Increasingly
【小题20】
A.lessB.extremelyC.moreD.slightly

同类题3

   Self-driving cars are so popular that the University of Michigan has even established a town called Mcity to allow car manufacturers to safely test their autonomous cars.

While Mcity can be used to simulate(模拟)many real-life road conditions,it can't help test gestures drivers use to communicate their intention(意图)to other drivers,pedestrians or cyclists. To find a solution,US car manufacturer Ford,with researchers from Virginia Tech,at the beginning considered using text as a way to communicate the car's intention,but decided it would probably not work universally. The option of using symbols was also rejected,because research shows that a majority of people do not have a good understanding of what they mean.

Finally, the researchers settled on light signals. A white light warned that there were no humans in the car. A slow blinking one indicated that the car was coming to a stop, while a rapidly flashing light cautioned passersby that the car was about to speed up.

Then came the big challenge—testing the signals on real roads. "We needed to try out this new lighting to communicate the intention of the vehicle, but if you've got a driver behind the seat, you still have natural communication between humans," said Andy Shaudt, who led the research team. "So we needed to make it look like a driverless car."

The team designed a car seat costume(戏装)that the driver would wear to cover his or her face and upper body. Of course,the drivers could see very clearly. The researchers then equipped the car with cameras to capture human reactions to a light bar,which flashed one of the three signals when appropriate. Six drivers,all keeping their hands low on the wheel so as not to be noticed,took turns to test driving the car through the busy streets.

The overall reaction to the flashing lights was very encouraging. Who knew costumes could be useful for more than Halloween?

【小题1】What did the team first consider using as a way to communicate the car's intention?
A.Light.B.Language.
C.Symbols.D.Sound.
【小题2】The underlined word "they" in the second paragraph refers to ________.
A.symbolsB.drivers
C.researchersD.flashes
【小题3】What does a rapidly flashing light mean?
A.The car was coming to a stop.
B.There was no driver in the car.
C.The car was about to speed up.
D.The car was about to slow down.
【小题4】The car seat costume was intended to ________.
A.amuse the driverB.attract the pedestrians
C.warn the cyclistsD.confuse the people

同类题4

   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5

   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