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

   As vending machines (投币式自动售货机) have a bad reputation generally, they are particularly not allowed to be used in schools. That is because most of them are filled with foods that are thought to be unhealthy for both kids and adults. However, no one will be against JetBlue’s vending machines. That is because they are installed (安装) to give out free books!

The U.S. airline’s program was launched in early July in one of Washington, D. C. ’s historic neighborhoods. It was picked because JetBlue’s research showed that kids in the area had access to only one age-appropriate book for every 830 children. To turn the situation for the better, the company has installed three vending machines in locations that are visited frequently by the locals, and soon they gain their popularity there.

The machines are filled with twelve age-appropriate books for children from birth to fourteen years old. A total of 42 titles are being offered, and the selection is changed every two weeks. Kids can help themselves to as many books as they wish and return for more books as many times as they desire. Maybe you will ask what the best part is. Unlike a library, the books are theirs to keep.

JetBlue and its partners Random House Children’s Books and Magic Tree House’s author Mary Pope Osborne, say they are committed to giving away 100,000 books. As of August 25, about 16,000 books have been claimed. So far, JetBlue has made its plans to extend (扩大) its vending machine program to more poor neighborhoods in Los Angeles, Detroit, Fort Lauderdale, Houston and New York City.

Though the book vending machines are new, this is not the first time that JetBlue and its partners have given away books. Since 2011, the company’s “Soar with Reading” program has collected over one million dollars’ worth of books to kids in need!

【小题1】People’s attitude towards vending machines is usually_____________.
A.positiveB.serious
C.concernedD.negative
【小题2】Why are JetBlue’s vending machines becoming popular?
A.Because they offer kids in need free books to read.
B.Because they are located in the center of busy streets.
C.Because they help kids develop the good habit of reading.
D.Because they are aimed at bringing a brighter future for kids.
【小题3】What is the best news for the kids about JetBlue’s vending machines?
A.More libraries will be open to the kids.
B.The books will be kept by the kids themselves forever.
C.Kids can exchange these books they keep with each other.
D.Kids under fourteen years old have access to these free books.
【小题4】It is implied in the passage that book vending machines __________.
A.will change the way the books are sold worldwide
B.are going to be installed in economically advanced areas
C.will benefit more kids who have little access to books
D.begin JetBlue’s time to give away books to kids in need

同类题2

   Onions make you cry, add flavor to food and win popularity for their medicinal benefits. Now the vegetable has another use—_____ green energy.

Anew system debuts(首次亮相)on Friday that _____ onion juice into electricity at Gills Onions, the largest fresh onion processor in the United States.

The Oxnard, California-based company _____ its new onion-fueled power to reduce its electric bill by $700,000 a year and _____ its annual greenhouse gas emissions by up to 30,000 tons.

The _____ ending to this green energy tale, however, started with another question: how to _____ onion waste.

“_____ we peel an onion, 35 to 40 percent of the onion comes off before we have a(n)_____ onion. That's the top, tail and skin around the onion, and _____ we can get to the meat,” said Steven Gill, co-owner of the 25-year-old company.

They used to pull the waste to the fields for compost(混合肥料), but that turned out to be a tough ______. Ten years ago, Gill started looking at technology for a(n) _____, including microturbines(微型燃气轮机).

“We ______ cutting the skins into pieces and extracting all the ______, which is very high in sugars, and bacteria love that stuff,” Gill said.

In the new system, bacteria ______ methane(甲烷)gas from the juice. The gas then goes to two 300 kilowatt fuel cells, creating ______ power for 460 homes. If everything goes smoothly, ______ are that the company will get 35 to 40 percent of its electricity from the on-site generator.

The company ______ $ 9. 5 million in the project and will receive $2. 7 million from Southern California Gas Co. _____ cutting its electric bill, the company will save $400,000 in costs and expects paybacks in the new future.

The onion grower now has a new ______: to be a zero-waste facility in the coming decade.

“We want to ______ it all the way through and make the full circle,” Gill said.

【小题1】
A.storingB.conveyingC.generatingD.pushing
【小题2】
A.changesB.transportsC.movesD.throws
【小题3】
A.urgesB.expectsC.assumesD.promises
【小题4】
A.controlB.removeC.checkD.cut
【小题5】
A.satisfyingB.disappointingC.suitableD.stable
【小题6】
A.take care ofB.look out forC.get rid ofD.give way to
【小题7】
A.WhenB.UnlessC.OnceD.Until
【小题8】
A.deliciousB.practicalC.accessibleD.usable
【小题9】
A.eventuallyB.luckilyC.probablyD.suddenly
【小题10】
A.problemB.decisionC.situationD.mistake
【小题11】
A.excuseB.agreementC.solutionD.judgment
【小题12】
A.end upB.hold outC.set outD.take up
【小题13】
A.tailsB.skinsC.gasD.juice
【小题14】
A.protectB.produceC.preventD.introduce
【小题15】
A.muchB.moreC.enoughD.too
【小题16】
A.challengesB.chancesC.guessesD.things
【小题17】
A.appliedB.distributedC.investedD.attracted
【小题18】
A.In terms ofB.In response toC.In exchange forD.In addition to
【小题19】
A.worryB.achievementC.adventureD.goal
【小题20】
A.observeB.followC.getD.put

同类题3

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4

   From Japan to Detroit, automobile manufacturers have been busy creating the green car, a vehicle that, in all its forms, promises to be one of the cleanest technologies on earth. To create the green car of the future, say designers, they will replace dangerous substances with safe ones, recycle car parts from antifreeze to old tires and develop alternative fuels.

To meet high environmental standards, automakers began renovating(翻新)their practices at the heart of the matter: the manufacturing process.

At General Motors(GM)a two-seat electric car named the Impact can travel 110 to 160 kilometers on a single charge, depending on driving habits and conditions. GM will begin the consumer test to the Impact in 12 U. S. cities this year. About a thousand people have been selected to drive the vehicle for two-and four-week periods.

Meanwhile, another alternative to standard gasoline-powered cars is Volkswagen’s Golf Ecomatic, recently introduced in Europe and powered by a diesel(柴油)engine that shuts down automatically whenever the car doesn’t require the force of push — while drivers are waiting at traffic lights, slowing to a standstill in heavy traffic or driving downhill. In city traffic alone, Volkswagen engineers expect 60 percent of the trip is spent either moving without its engine turned on or waiting, and overall the carbon dioxide emissions(排放物)produced by the Golf Ecomatic are 22 percent less than those of a standard diesel-powered automobile.

In the end, the green car will be good not only for the environment but also for business. In the long run environmental success is essential to business success, and many companies have recognized this reality, as a growing number of people want to purchase products from environmentally responsible firms.

【小题1】What is the main purpose of automakers worldwide designing the green car?
A.To increase the efficiency of fuels now in use.
B.To solve the problem of the ever-worsening fuel shortage.
C.To meet high environmental standards.
D.To clear the world of waste car parts.
【小题2】Which of the following is the chief advantage of Golf Ecomatic?
A.It shortens waiting time in the street.
B.It reduces carbon dioxide emissions.
C.It cuts down on the consumption of diesel.
D.It ensures the quality of being pollution-free.
【小题3】What can we learn from the last paragraph?
A.Automakers have come to see the advantage of making green cars.
B.Environmental protection should not be achieved at the risk of business failure.
C.Automakers may lose much in the production of green cars.
D.The general public are all eager to use the green car.
【小题4】What is the main purpose of the passage?
A.To educate people on environmental protection.
B.To list the advantages of green cars over traditional ones.
C.To explain the process of developing green cars.
D.To inform people of the development of green cars.