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1、英语考试阅读理解训练题 Craigrogerswassittingonhissurfboard,scanningthedistanceforhisnextwave,whenhisboardsuddenlystoppedmoving.helookeddownandwasterrifiedtoseeagreatwhitesharkbitingthefrontofhisboard.”Icouldhavetoucheditseyewithmyelbow,”sayscraig.Thesharkhadsurfac
2、edsoquietlythathehadn’theardathing. Inhishorrorandconfusion,hewavedhisarmsandaccidentallycuttowofhisfingersontheshark’steeth.Hethenslidofftheoppositesideofhissurfboardintothewater.Then,withCraiginthewaterandbloodflowingfromhisfingers,thefive-meter-longs
3、harksimplyswamaway,disappearingintothewaterbelow. Althoughsharksareoftencategorizedaskillersthathuntandeatasmanyhumansasthencan,thisisfactuallyinaccurate.Sharksveryrarelykillhumans,Apersonhasagreaterchanceofbeingstruckbylightningordrowninginabaththanofb
4、eingkilledbyashark.Only74peoplehavebeenreportedkilledbygreatwhitesinthelastcentury.Butgreatwhitesharkscanreachsixmetersinlengthandweigh2200kilogramsormore.Withfrighteningjawsthatcanholdupto3000teetharrangedinseveralrows,theycouldveryeasilykillandeatahelp
5、lesshumaninthewater.Whyisit,then,thatmostpeoplesurviveattacksbygreatwhites?Sharkresearchersaretryingtocomprehendthereasonsthatallowpeopletoescapewithoutbeingeaten. Themostcommonexplanationisthatgreatwhitesdon’tseewell.Ithasbeenthoughtthattheymistakepeop
6、leforthesealsorsealionswhichmakeupalargepartoftheirdiet.Thereisreasontodoubtthis,however.Recentinformationshowsthatgreatwhitescanactuallyseeverywell.Also,whenaccackingseals,greatwhitesshoopuptothesurfaceandbitewithgreatforce.Whenapproachinghumans,however
7、,theymostoftenmoveinslowlyandbitelesshard.Theysoondiscoverthathumansarenotahigh-fatmeal.”Theyspitusoutbecausewe’retoobony,”saysAidanMartin,directorofReefQuestCenterforSharkResearch. SharkresearcherslikeMartinhypothesizethatgreatwhitesareactuallycuriousa
8、nimalsthatliketoinvestigatethings.It’spossiblethattheyusetheirbitenotonlytokillandeat,butalsotogatherinformation,AlthoughsuchanexperienceisunluckyforpeoplelikeCraigRogers,whensharksbitesurfboardsorotherobjectsorpeople,they
