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1、Unit4Astronomythescienceofthestars一、阅读理解。Theeffectsofcoffeeconsumptiononhealthhavelongbeenasubjectofconflictanduncertainty.Sincethe1980s,somehavespokenoutagainstcoffeeasit’sharmfultohealth,whileothershavewelcomedcoffeeforitssupposedbenefitstohealth.Accordingtoascient
2、ificreport,mildcoffeeconsumption,threetofivecupsperday,canbetakenasahealthydietarypattern,alongwithotherhealthfulbehavior.ThereportalsosaysthatcoffeeconsumptionhelpsreducetheriskofheartdiseaseanditprotectsagainstParkinson’sdisease.AccordingtoDr.DonaldHensrudofMayoCli
3、nic,highconsumptionofcoffeehashealthrisks.Dr.Hensrudmentionsthedangersofhighcoffeeconsumptionforpeoplewithacertainillnessthatslowsthebreakdownofcaffeineinthebody.Somestudiessaidthatdrinkingtwoormorecupsofcoffeedailycanactuallyincreasetheriskofheartdiseaseinthesepeopl
4、e.AccordingtoconclusionsfromarecentstudyledbyDr.GregoryMarcus,adoctorfromtheUniversityofCalifornia,SanFrancisco,dailymoderateconsumptionofcaffeine,lessthan4cups,isnotassociatedwiththeseissues.Untilthescientificcommunityreachesageneralagreementontheeffectsofcoffeecons
5、umptiononhumanhealth,itwillbeuptotheindividualtodecidewhetherthebenefitsofdrinkingcoffeearegreaterthantherisks.Wheninformedofthesepossiblehealthbenefitsandharmofdrinkingcoffee,Harwood,ahighschoolstudentstated,“Eventhoughtheremightbesomenegativeeffectsofdrinkingcoffee
6、,forthemostpart,coffeedrinkingsoundsgoodforhealth.NottomentionIneedcoffeetostayawake.”【解题导语】 本文是一篇说明文。主要介绍了人们对咖啡是否有益于身体健康的几种不同观点。1．Whatisthepeople’sattitudetowardstheeffectsofcoffeeonhealthaccordingtoParagraph1?A．Disapproving. B．Tolerant.C．Doubtful.D．Mixed.D 解
7、析：细节理解题。根据第一段可知，长期以来，饮用咖啡是否对健康有影响一直是有争议的、不确定的。一些人认为咖啡有害于健康，一些人则认为其有益于健康。D项意为“混合的，混杂的”，符合题意，故D项正确。2．Whatdoestheunderlinedword“moderate”inParagraph4probablymean?A．Personal.B．Slight.C．Reasonable.D．Heavy.C 解析：词义猜测题。根据该句中的“lessthan4cups”可知，饮用的咖啡不超过4杯；据此可以判断，该句是说，每天摄入适量的咖啡
8、因对身体无害。据此可知，画线词意为“适度的”，故C项正确。3．WhatcanweinferaboutHarwood?A．He’llkeepondrinkingcoffee.B．Heloveshishighschoollife.C．Heoftenfallsasle
