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英语PETS五级阅读专项练习题英语PETS五级阅读专项练习题练习是巩固知识的`有效手段，每一练习都是一次积淀。下面是小编整理的2017年PETS-5级阅读理解题练习，希望对大家有用，更多消息请关注。Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66——70,choosethemostsuitableparagraphfromthelistA——Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhich"doesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreactiontopoisonivyeachyear.Poisonivyisoftenvery.difficulttospot.Itcloselyresemblesseveralothercommongardenplates,andcanalsoblendinwithotherplantsandweeds.Butifyoucomeintocontactwithit,youIIsoonknowbytheitchy,blisteryrashthatformsonyourskin.Poisonivyisared,itchyrashcausedbytheplantthatbearsitsname.Manypeoplegetitwhentheyarehikingorworkingintheirgardenandaccidentallycomeintodirectcontactwiththeplantsleaves,roots,orstems.Thepoisonivyrashoftenlookslikeredlines,andsometimesitformsblisters.66.About85percentofpeopleareallergictotheurushiolinpoisonivy,accordingtotheAmericanAcademyofDermatology.Onlyatinyamountofthischemical--1billionthofagram--isenoughtocausearashinmanypeo-ple.Somepeoplemayboastthattheyvebeenexposedtopoisonivymanytimesandhavenevergottentherash,butthatdoesntnecessarilymeantheyrenotallergic.Sometimestheallergydoesntemergeuntilyouvebeenex-posedseveraltimes,andsomepeopledeveloparashaftertheirveryfirstexposure.Itmaytakeuptotendaysfortherashtoemergethefirsttime.67.Herearesomeotherwaystoidentifythepoisonivyplant.Itgenerallygrowsinaclusteroflow,weed-likeplantsorawoodyvinewhichcanclimbtreesorfences.Itismostoftenfoundinmoistareas,suchasriverbanks,woods,andpastures.Theedgesoftheleavesaregenerallysmoothorhavetiny"teeth".Theircolorchangesbasedontheseason--reddishinthespring;greeninthesummer;andyellow,orange,orredinthefall.Itsberriesaretypicallywhite.68.Thebodysimmunesystemisnormallyinthebusinessofprotectingusfrombacteria,viruses,andtheforeigninvadersthatcanmakeussick.Butwhenurushiolfromthepoisonivyplanttouchestheskin,itinstigatesanimmun
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