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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