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The Ameriean space ageney NASA has reeased sounds it created with data olltedfrom black holesThesoudo sd tion.NASA says tusedstrmicl(天文学的)dataedbyitsChandraayaory Speeial equphthe datanode of the black holes sudied sits at thenter ofthe Perseus().The Persus lustrs homedredoTheyre yrmh Backpac wheretisstrong that nothingoeven ligtcethem They re believedto be formed by collapsed stars.NASA says it discovered inthat the black hole deep inside the center of the Perseus galaxywaslinkedtsoud.Astronomers had earlier foundthatesur waves"sent ou by the khoeasd(ithe se hot gas.And they said that they could translate those rippeinfoudButheoewas ata very low range that humans cannot hear.Using new sonification methods,NASA says itwasable toNASA xplains that there is a popular misunderstanding that there is no sound in space.It isrue that mostproduce sounds from the ripples that we could hear.of space existsina vacuum,meaning it is separated from outside eventsor infene.But a galaxyter inthe universe contains large amounts of gas that surrounds the many galaxies within it.This.rin toNASAFor the new sonification of the Perseus black hole,the NASA team used the sound waves they had collected inprovides a medium for the sound waves to travel.the past.But the astronomers then had to put the signalsintorange that th human ar could hear.Todo this,they柴greatly raised the pitch of the waves to a level far above their own frequency.28.What is probably the text?B.Part of a news report.A.An advertisement.C.Part of a science fiction story.D.A text from a physics textbook.洲29.What do we know about sonification?A.It changes data to sound.B.It causes ripples in black holes冷C.It turns black hole waves into data.D.It records data sent out by black holes.30.What does the underlined word"This"in paragraph 5 refer to?辨B.A vacuum.C.The gasD.The universeA.A galaxy31.What can we learn from the text?营A.A black hole used to be a star.B.There's no sound in outer space.C.Humans can hear sounds from black holes.D.Light sometimes can run away from a black hole.DFor much of history,reading was a fairly noisy activity.On clay tablets written in ancient Iraq and Syria some 4,000years ago,the commonly used words for‘to read”literally meant“to cry out'or‘“to listen'”."Iam sending a very urgentmessage,"says one letter from this period."Listen to this tablet.If it is appropriate,have the king listen to it.Today,silent reading is the norm.Reading out loud is largely reserved for bedtime stories and performances.Buta growing body of research suggests that we may be missing out by reading only with the voices inside our minds.Psychologist Colin MacLeod and his colleagues have found that people consistently remember words and texts better ifheyead themaloud than if theyead themsitly.This memory-boosting of readingaloud is particullystrongin children,but it works for older people,too."It's beneficial throughout the age range,says MacLeod.MacLeod has named this phenomenon the"production effect.And it has been replicated (in numerousstudies.Inestudy in Australia,a group of7-to 10-year-olds were presented with a list of words and asked to readsome siletly,ad othersaoud.Afterwards,theytycoi7%ofthe words theyread loud,butoy7共of the silent ones.In another study,aduls aged 67towere given the same task-reading words ither silentlyor