2019高考英语一轮达标Unit2Cloning练题含解析新人教版选修8（含解析）117

《2019高考英语一轮达标Unit2Cloning练题含解析新人教版选修8（含解析）117》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、【人教版】2019高考英语一轮达标试卷Unit2Cloning一、阅读理解.Ifyou'remakingdeterminationforahealthiernewyear，consideragutmakeover(肠道清理)．Changingyourmicrobecommunity(微生物群)，however，maynotbeeasy，andnobodyknowshowlongitmighttake.That'sbecausetheecosystemalreadyestablishedinyourgutdetermineshowitabsorbsandprocesse

2、snutrients.Soifthemicrobecommunityinyourguthasbeenshapedbyadailydietofhamburgersandpizza，forexample，itwon'trespondasquicklytoahealthydietasagutshapedbyvegetablesandfruitsthathasamorevariedmicrobecommunity.“Thenutritionalvalueoffoodisinfluencedinpartbythemicrobecommunitythatencounterstha

3、tfood，”saidDrJeffreyGordon，theseniorauthorofthenewpaperanddirectoroftheCenterforGenomeScienceandSystemsBiologyattheWashingtonUniversitySchoolofMedicineinSt.Louis.“Nutritionalcomponentsofahealthydiethavetobeviewedfromtheinsideout，”hesaid，“notjusttheoutsidein.”Oneofthequestionsthestudyset

4、outtoanswerwashowindividualswithdifferentdietsrespondwhentheytrytoimprovetheireatinghabits.Thescientistsharvestedgutbacteriafromhumans，transplantedthemintomicebredunder【人教版】2019届高考英语一轮达标卷：全一册练题【人教版】2019高考英语一轮达标试卷germfreeconditions，andthenfedthemiceeitherAmericanstyleorplantbaseddiets.Th

5、escientiststhenanalyzedchangesinthemice'smicrobecommunities.Ofinterest，thescientistsharvestedthegutbacteriafrompeoplewhofollowedsharplydifferentdiets.OnegroupateafairlytypicalAmericandiet，consumingabout3000caloriesaday，highinanimalproteinswithfewfruitsandvegetables.Someoftheirfavoritefo

6、odswereprocessedcheeseandlunchmeat.Theothergroupconsistedofpeoplewhowerecalorierestricted.Theyatelessthan1800caloriesadayandhadcarefullytrackedwhattheyateforatleasttwoyears，stickingtoamostlyplantbaseddietandconsumingfarlessanimalproteinthantheothergroup，athirdfewercarbohydrates(碳水化合物)an

7、donlyhalfthefat.Thiscalorierestrictedgroup，theresearchersfound，hadafarricherandmorediversemicrobecommunityinthegutthanthoseeatingatypicalAmericandiet.Theyalsocarriedseveralkindsof“good”bacteria，knowntopromotehealth，thatareuniquetotheirplantbaseddiet.“Perhapsthebestwaytoshapeahe