问题详情
A. invisible
B.emotional
C. poisonous
D. magical
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共用题干
I'll Be Bach
Composer David Cope is the inventor of a computer program that writes original works of classical music.It took Cope 30 years to develop the software.Now most people can't tell the difference between music by the famous German composer J.S.Bach(1685-1750)and the Bach-like compositions from Cope's computer.
It all started in 1980 in the United States,when Cope was trying to write an opera.______(46)At first this music was not easy to listen to.What did Cope do?He began to rethink how human beings compose music.He realized that composers'brains work like big databases.First,they take in all the music that they have ever heard.______(47)Finally,they make new music from what is left.According to Cope,only the great composers are able to create the database accurately,remember it,and form new musical patterns from it.
Cope built a huge database of existing music.He began with hundreds of works by Bach.The software analyzed the data:it broke it down into smaller pieces and looked for patterns.It then combined the pieces into new patterns._______(48)They weren't good,but it was a start.
Cope knew he had more work to do-he had a whole opera to write.He continued to improve the software.Soon it could analyze more complex music.He also added many other composers,including his own work,to the database.
A few years later,Cope's computer program,called"Emmy",was ready to help him with his opera.______(49)Cope listened to the computer's musical ideas and used the ones that he liked.With Emmy,the opera took only two weeks to finish.It was called Cradle Falling,and it was a great success! ______(50) Since that first opera,Emmy has written thousands of compositions,Cope still gives Emmy feedback on what he likes and doesn't like of her music,but she is doing most of the hard work of composing these days!
______(49)
A:By developing a computer software,David Cope aimed to write an opera.
B:Cope received some of the best reviews of his career,but no one knew exactly how he had composed the work.
C:He was having trouble thinking of new melodies,so he wrote a computer program to create the melodies.
D:The process required a lot of collaboration between the composer and Emmy.
E:Before long,the program could compose short Bach-like works.
F:Then they take out the music that they dislike. -
共用题干
Free Statins with Fast Food could Neutralize Heart Risk
Fast food outlets could provide statin drugs free of1so that customers can reduce the heart disease dangers of fatty food,researchers at Imperial College London 2in a new study.
Statins reduce the3of unhealthy“LDL” cholesterol in the blood. A wealth of trial data has proven them to be highly effective at lowering a person's heart attack4.
In a paper published in the American Journal of Cardiology,Dr Darrel Francis and colleagues calculate that the reduction in heart attack risk offered by a statin is5to offset the increase in heart attack risk from6a cheeseburger and drinking a milkshake.
Dr Francis,from the National Heart and Lung Institute at Imperial College London,who is the senior author of the study,said:“Statins don't cut out all of the7effects of cheeseburgers and French fries. It's better to avoid fatty food altogether. But we've worked out that in terms of your8of having a heart attack. Taking a statin can reduce your risk to more or less the same9 as a fast food meal increases it.”“It's ironic that people are free to take as many unhealthy condi-ments in fast food outlets as they10,but statins,which are beneficial to heart health,have to be prescribed. It makes sense to make risk-reducing statins available just as easily as the unhealthy condiments that are 11 free of charge. It would cost less than 5 pence per/u>12一not much different to a sachet of sugar.”Dr Francis said.
When people engage in risky behaviours like driving or smoking,they're encouraged to take13that lower their risk,like14a seatbelt or choosing cigarettes with filters.
Taking a statin is a rational way of15some of the risks of eating a fatty meal.
15._________
A: increasing
B: finding
C: lowering
D: taking -
In the darkness,the hunter pereived that something was moving in the bushes.
A:discovered
B:realized
C:saw
D:sensed -
The project required ten years of diligent research.
A:hardworking
B:social
C:basic
D:scientific -
共用题干
第二篇
Credit Card Only Works When Spoken To
A credit card that will not work unless it hears its owner's voice could become an
important weapon in the fight against fraud（欺骗）.
The card requires users to give a spoken password that it recognizes using a built-in
voice-recognition chip.The idea is to prevent thieves using a stolen card or fraudsters using
someone else's credit card details to buy goods online.
A model built by engineers at Beepcard in Santa Monica,California,represents the
first attempt to pack a microphone,a loudspeaker,a battery and a voice-recognition chip
into a standard-sized credit card.
They are not quite there yet:the card is the length and width of an ordinary credit card,
but it is still about three times as thick.The company now plans to make it thinner.
The voice card is based on an earlier Beepcard technology designed to prevent fraud in
online transactions.This earlier card has no microphone,but has a built-in loudspeaker
that it uses to " squawk"（发出叫声）a voice ID signal via a computer's microphone to an
online server.
By verifying（证实）that the signal matches the card details,the server can establish
that the user is not simply keying in a credit card number but actually has the card to hand.
The ID code changes each time the card is used in a pre-ordered sequence that only the server knows.
This prevents fraudsters recording the beeps, noting the card details and then playing
back the audible ID when they key in the details later.But this earlier technology cannot
prevent fraudulent use of stolen cards.The new one can.
The new voice card also identifies itself by its ID squawk,but it will not do this until it
has verified the legitimate（合法的）user's spoken password. Thieves will be unable to use
the card because even if they knew the password they would have to be able to copy the
owner's voice with a high degree of accuracy.
The challenge for Beepcard has been to develop voice-recognition and audio circuitry
that can be powered by a mini battery embedded（嵌入的）in a credit card. To maximize
battery life,the electronics are only switched on when the card is being used.Pressing a
button on the card's surface prompts it to utter "Say your password" in female voice.If the
voice-recognition software proves that the password is authentic（真实的）,it sends its ID
squawk which the server then identifies,allowing the transaction to proceed.
The voice credit card is an important invention because
A:it can be made cost-effectively.
B:it can leave voice messages.
C:it makes online shopping easy.
D:it makes fraud difficult.