2017年职称英语考试阅读真题及答案「综合C」
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自古以来学有建树的'人,都离不开一个“苦”字。以下是小编为大家搜索整理的2017年职称英语考试阅读真题及答案【综合C】,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!
ElectricBackpack
Backpacksare can hold your books,your lunch,and achange ofclothes,leaving your hands free to do other day,if youdont mindcarrying a heavy load,your backpacks might also power your MP31player,keep yourcell phone running,and maybe even light your wayhome.
and his colleagues from the University of Pennsylvania in Philadelphia2and the Marine Biological Laboratory in WoodsHole3,Mass.4,have invented abackpack that makes electricity from energyproduced while its wearer litary actions,search-and-rescueoperations,and scientific fieldstudies,people rely increasingly on cellphones,global positioning system (GPS)5 receivers,night-vision goggles,andother battery powered devices to get aroundand do their backpackselectricity- generating feature coulddramatically reduce the amount of awearer’s load now devoted to spare batteries,report Rome and his colleaguesinthe Sept.9 Science6.
Thebackpacks electricity-creating powers depend onsprings used to hang a clothpack from its metal frame sits againstthe wearer’s back,and the whole pack moves upand down as the person r mechanism converts vertical movements of thepack to rotary motions of anelectrical generator,producing up to 7.4 watts.
Unexpectedly,testsshowedthat wearers of the new backpack alter their gaits in response to thepacksoscillations,so that they carry loads more comfortably and with lesseffortthan they do ordinary use of that surprising advantage,Romeplans to commercialize both electric and non-electric versionsof the backpack.
The backpackcould be especially useful orsoldiers,scientists,mountaineers,and emergencyworkers who typically carryheavy the rest of us,power-generatingbackpacks could make itpossible to walk,play video games,watch TV,and listen tomusic,all at the tricity-generating packs arent on the marketyet,but if you do get one eventually,just make sure to look both ways beforecrossing thestreet!
packs are convenient because
答案: yourhands are freed to do other things.
is the most important feature of the backpack invented byLawrence and his colleagues?
答案: Itproduces electricity forelectronic devices while the wearer walks.
word "springs" inParagraph 3 means .
答案: a lengthof metal woundaround,which returns to its original shape after
being pushed.
rdingto Paragraph 4,what does Rome plan to do?
A To makethe backpackmore comfortable for the wearer.
答案: To putthe backpack on the market.
isimplied in “if you do getoneeventually,just make sure to took both ways before crossing thestreet!"?
答案:Enjoyingelectronic devices while walking may invite traffic accidents.
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