江西省横峰县2017届高三英语下学期第6周周练试题

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1、江西省横峰县2017届高三英语下学期第6周周练试题考试日期：3月14日阅读理解AMosquitoeshaveanextraordinaryabi1itytotargethumansfarawayandflystraighttotheirunprotectedskin.Regrettably^mosquitoescandomorethancauseanitchy（发痒白勺）wound・Somemosquitoesspreadseveralseriousdiseases,includingDengue,yellowfeverandmalaria・Overonemilli

2、onpeopleworldwidediefromthesediseaseseachyear.Newresearchnowshowshowmosquitoeschoosewhotobite.Mosquitoesneedbloodtosurvive・Theyareattractedtohumanskinandbreath・Theysmellthecarbondioxidegas,whichallmammalsbreatheout・Thisgasisthemainwayformosquitoestoknowthatawarm-bioodedcreatureisnearby

3、.Butmosquitoesalsousetheireyesandsenseoftouch.MichaelDickinsonisaprofessorattheCaliforniaInstituteofTechnology.Hisresearchshowshowthesesmallinsects,withevensmallerbrains,usethreesensestofindabloodmeal.MichaelDickinson，steamusedplumes一amaterialthatrisesintotheairofcarbondioxidegasintoaw

4、indtunne1・Theythenusedcamerastorecordthemosquitoes.Theinsectsfollowedtheplume.Then,thescientistsplaceddarkobjectsonthe1ightercoloredfloorandwal1softhetunne1.Mr.Dickinsonsaid,atfirst,themosquitoesshowednointerestintheobjectsatall.“Whatwasquitestrikingandquitesurprisingisthatthemosquitoe

5、sflybackandforthforhours.Thesearehungryfemalesandtheycompletelyignoretheobjectsonthefloorandwallofthetunnel-ButthemomenttheygetahitofC02,theychangetheirbehaviorquiteobviouslyandnowwouldbecomeattractedtotheselittlevisualblobs（斑点）.”Thissuggestedtotheresearchersthatamosquito"ssenseofsmell

6、ismoreimportantinthesearchforfood・Oncemosquitoescatchasmellofahumanoranimal,theyalsofollowvisualsignals.28.Whatdomosquitoesmainlyusetofindtheirtargets?A.Senseofsmell.B.Senseoftouch.C.Senseofsight.D.Smartbrains.28.ThefirstresponseofthemosquitoestotheobjectsintheexperimentisA.toflytothed

7、arkonesB.tocatchandsticktothemC.totakenonoticeofthemD.toattachthemselvestothemtothetext?29.HowcanweavoidbeingattackedbymosquitoesaccordingA.Don，t1etthemseeus.B.Usedarkobjectstostopthem.C・Makethemflybackandforthforhours.D.Attractthemtoobjectsfullofcarbondioxidegas.31.Whatcanbethebestt