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What is the most important feature of the backpack invented by Lawrence C.Rome and his colleagues?
A It produces electricity for electronic devices while the wearer walks.
B It can be used as cellphones，GPS in the military actions or field studies.
C It is small and convenient.
D It is light and easy to carry.
B It can be used as cellphones，GPS in the military actions or field studies.
C It is small and convenient.
D It is light and easy to carry.
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更多 “What is the most important feature of the backpack invented by Lawrence C.Rome and his colleagues?A It produces electricity for electronic devices while the wearer walks. B It can be used as cellphones，GPS in the military actions or field studies. C It is small and convenient. D It is light and easy to carry.” 相关考题
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第二篇Electric BackpackBackpacks are convenient. They can hold your books,your lunch,and a change of clothes,leaving your hands free to do other things.Someday,if you don't mind carrying a heavy load,your backpacks might also power your MP3 player,keep your cell phone running,and maybe even light your way home.Lawrence C.Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,Mass.,have invented a backpack that makes electricity from energy produced while its wearer walks.In military actions,search-and-rescue operations,and scientific field studies,people rely increasingly on cell phones,global positioning system(GPS)receivers,night-vision goggles,and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries,report Rome and his colleagues in the Sept.Science.The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.The frame sits against the wearer's back,and the whole pack moves up and down as the person walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts.Unexpectedly tests showed that wearers of the new backpack alter their gaits in response to the pack'soscillations,so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versions of the backpack.The backpack could be especially useful for soldiers,scientists,mountaineers,and emergency workers who typically carry heavy backpacks.For the rest of us,power-generating backpacks could make it possible to walk,play video games,watch TV,and listen to music,all at the same time.Electricity-generating packs aren't on the market yet,but if you do get one eventually,just make sure to look both ways before crossing the street!What is implied in"if you do get one eventually,just make sure to look both ways before crossing the street!"?A:You will be too excited to watch the traffic.B:Enjoying electronic devices while walking may invite traffic accidents.C:It is not possible for you to get such a backpack.D:It is wise of you to have such a backpack.
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第二篇Electric BackpackBackpacks are convenient. They can hold your books,your lunch,and a change of clothes,leaving your hands free to do other things.Someday,if you don't mind carrying a heavy load,your backpacks might also power your MP3 player,keep your cell phone running,and maybe even light your way home.Lawrence C.Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,Mass.,have invented a backpack that makes electricity from energy produced while its wearer walks.In military actions,search-and-rescue operations,and scientific field studies,people rely increasingly on cell phones,global positioning system(GPS)receivers,night-vision goggles,and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries,report Rome and his colleagues in the Sept.Science.The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.The frame sits against the wearer's back,and the whole pack moves up and down as the person walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts.Unexpectedly tests showed that wearers of the new backpack alter their gaits in response to the pack'soscillations,so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versions of the backpack.The backpack could be especially useful for soldiers,scientists,mountaineers,and emergency workers who typically carry heavy backpacks.For the rest of us,power-generating backpacks could make it possible to walk,play video games,watch TV,and listen to music,all at the same time.Electricity-generating packs aren't on the market yet,but if you do get one eventually,just make sure to look both ways before crossing the street!The word"springs"in Paragraph 3 means_____________.A:a small stream of water flowing naturally from the earthB:the season of the year,occurring between winter and summerC:the act or an instance of jumping or leapingD:a length of metal wound around, which returns to its original shape after being pushed
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共用题干
第二篇Electric BackpackBackpacks are convenient. They can hold your books,your lunch,and a change of clothes,leaving your hands free to do other things.Someday,if you don't mind carrying a heavy load,your backpacks might also power your MP3 player,keep your cell phone running,and maybe even light your way home.Lawrence C.Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,Mass.,have invented a backpack that makes electricity from energy produced while its wearer walks.In military actions,search-and-rescue operations,and scientific field studies,people rely increasingly on cell phones,global positioning system(GPS)receivers,night-vision goggles,and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries,report Rome and his colleagues in the Sept.Science.The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.The frame sits against the wearer's back,and the whole pack moves up and down as the person walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts.Unexpectedly tests showed that wearers of the new backpack alter their gaits in response to the pack'soscillations,so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versions of the backpack.The backpack could be especially useful for soldiers,scientists,mountaineers,and emergency workers who typically carry heavy backpacks.For the rest of us,power-generating backpacks could make it possible to walk,play video games,watch TV,and listen to music,all at the same time.Electricity-generating packs aren't on the market yet,but if you do get one eventually,just make sure to look both ways before crossing the street!What is the most important feature of the backpack invented by Lawrence C.Rome and his colleagues?A:It produces electricity for electronic devices while the wearer walks.B:It can be used as cell phones,GPS in the military actions or field studies.C:It is small and convenient.D: It is light and easy to carry.
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共用题干
第二篇Electric BackpackBackpacks are convenient. They can hold your books,your lunch,and a change of clothes,leaving your hands free to do other things.Someday,if you don't mind carrying a heavy load,your backpacks might also power your MP3 player,keep your cell phone running,and maybe even light your way home.Lawrence C.Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,Mass.,have invented a backpack that makes electricity from energy produced while its wearer walks.In military actions,search-and-rescue operations,and scientific field studies,people rely increasingly on cell phones,global positioning system(GPS)receivers,night-vision goggles,and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries,report Rome and his colleagues in the Sept.Science.The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.The frame sits against the wearer's back,and the whole pack moves up and down as the person walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts.Unexpectedly tests showed that wearers of the new backpack alter their gaits in response to the pack'soscillations,so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versions of the backpack.The backpack could be especially useful for soldiers,scientists,mountaineers,and emergency workers who typically carry heavy backpacks.For the rest of us,power-generating backpacks could make it possible to walk,play video games,watch TV,and listen to music,all at the same time.Electricity-generating packs aren't on the market yet,but if you do get one eventually,just make sure to look both ways before crossing the street!Backpacks are convenient because_____________.A:they can be very largeB:they can hold as many things as you want to carryC:your hands are freed to do other thingsD:you do not have to carry things with you
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第二篇Electric BackpackBackpacks are convenient. They can hold your books,your lunch,and a change of clothes,leaving your hands free to do other things.Someday,if you don't mind carrying a heavy load,your backpacks might also power your MP3 player,keep your cell phone running,and maybe even light your way home.Lawrence C.Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,Mass.,have invented a backpack that makes electricity from energy produced while its wearer walks.In military actions,search-and-rescue operations,and scientific field studies,people rely increasingly on cell phones,global positioning system(GPS)receivers,night-vision goggles,and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries,report Rome and his colleagues in the Sept.Science.The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.The frame sits against the wearer's back,and the whole pack moves up and down as the person walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts.Unexpectedly tests showed that wearers of the new backpack alter their gaits in response to the pack'soscillations,so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versions of the backpack.The backpack could be especially useful for soldiers,scientists,mountaineers,and emergency workers who typically carry heavy backpacks.For the rest of us,power-generating backpacks could make it possible to walk,play video games,watch TV,and listen to music,all at the same time.Electricity-generating packs aren't on the market yet,but if you do get one eventually,just make sure to look both ways before crossing the street!According to Paragraph 4,what does Rome plan to do?A:To make the backpack more comfortable for the wearer.B:To put the backpack on the market.C:To test the advantage of the backpack.D:To promote the backpack in a newspaper or on television.
考题
Electrick Backpack 【电子背包】
Backpacks are convenient. They can hold your books，your lunch，and a change of clothes，leaving your hands free to do other things.Someday，if you don't mind carrying a heavy load，your backpacks might also power your MP31player，keep your cell phone running，and maybe even light your way home.
Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia2 and the Marine Biological Laboratory in WoodsHole3，Mass.4，have invented a backpack that makes electricity from energy produced while its wearer walks. In military actions，search-and-rescue operations，and scientific field studies，people rely increasingly on cellphones，global positioning system (GPS) 5 receivers，night-vision goggles，and other battery powered devices to get around and do their work.
The backpack’s electricity- generating feature could dramatically reduce the amount of awearer’s load now devoted to spare batteries，report Rome and his colleagues in the Sept.9 Science6.The backpack’s electricity-creating powers depend on springs used to hang a cloth pack from its metal frame.The frame sits against the wearer’s back，and the whole pack moves up and down as the person walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator，producing up to 7.4 watts.
Unexpectedly，tests showed that wearers of the new backpack alter their gaits in response to the pack’s oscillations，so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage，Rome plans to commercialize both electric and non-electric versions of the backpack.
The backpack could be especially useful for soldiers，scientists，mountaineers，and emergency workers who typically carry heavy backpacks.For the rest of us，power-generating backpacks could make it possible to walk，play video games，watch TV，and listen to music，all at the same time.Electricity-generating packs aren’t on the market yet，but if you do get one eventually，just make sure to look both ways before crossing the street!
文章(16~20)
Backpacks are convenient becauseA they can be very large.
B they can hold as many things as you want to carry.
C your hand sare freed to do other things.
D you do not have to carry things with you.
考题
According to Paragraph 4，what does Rome plan to do?A To make the back pack more comfortable for the wearer.
B To put the backpack on the market.
C To test the advantage of the backpack.
D To promote the backpack in a newspaper or on television.
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第二篇Lawrence CurryWhen I tell people my name,they always ask me if I'm related to Lawrence Curry,the novelist,and when I say,yes,he was my great-uncle,they always want to know what he was like. "We've read all his books,"they say,"but please tell us what he was really like."When I described him,as I knew him,they go disappointed.It seems that they find it difficult to accept such a great figure could have had such an ordinary character.My great-uncle was tall,with a long thin body.When he walked,he moved stiffly,with his arms clamped against his sides,looking like nothing so much as a pair of scissors.When I knew him,his hair as quite white,though it was supposed to have been yellow when he was young. His eyes were blue and deep set and had an anxious look about them as if he found the world a puzzling place.This expression of anxiety,which arose from nothing more than short-sight一he refused to wear glasses一inspire the protective instincts of his lady admirers,much to the irritation my great-aunt who thought all women were fools,except herself.Great-uncle Curry was naturally lazy. He spent a great deal of his time in the village pub playing darts.He was also a compulsive reader from the local telephone directory to great-aunt's shopping lists.For a man whose book showed such a deep perception of the complexities of human behavior, his conversation was surprisingly trivial.He delighted in discussing English weather,the price of beer,his grandchildren's most amusing words.He loved gossip,but he was kind.I never heard him make a malicious remark,but the wisdom of his writing never appeared in his conversation.As a child,we much preferred the company of his cousin,Stanly,who was a successful shop-owner who always brought us bags of sugar and broken biscuits.Taking it all in all,I have to admit my famous great-uncle was rather a bore.Which statement is NOT true,according to the third and fourth paragraph? A:Lawrence was lazy.B:Lawrence was boring.C:Lawrence tended to read anything he could find.D:Lawrence was a humorous man but seldom showed it in his remark.
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单选题In listening to a person the important thing is ______.A
to notice his tone, his posture, and the look in his eyeB
to listen to how he pronounces his wordsC
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