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2020年度12月大学英语四级第二套真题和答案

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roduceduringphotosynthesis-aprocessofconvertingsunlightintoenergy.Aplantusesonlyasmallpartoftheenergyproducedbythatprocess.Therestgoesintothesoil.E-Kaiacollectsthatenergy.Thedeviceplugsintothegroundandthenintoamobilephone.TheE-Kaiasolvedtwoproblemsfortheengineeringstudents.Theyneededanideaforaclassproject.Theyalsoneededanoutlettoplugintheirphones.Oneofthestudentinventors,CamilaRupcich,saysthedevicechangestheenergyreleasedfromtheplantintolow-levelpowertochargephones.TheE-Kaiaisabletofullyrechargeamobilephoneinlessthantwohours.Questions5to7arebasedonthenewsreportyouhavejustheard·didthethreeuniversitystudentsinvent?didtheygettheideafortheinvention?7.Whatdoesthespeakersayabouttheinvention?SectionBPassageOneM:Goodmorning.WhatcanIdoforyou?W:Goodmorning.CouldItalktoJeffryHardingplease?M;Speaking.

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