课标通用2018版高考英语复习unit4wildlifeprotection课时作业新人教版

《课标通用2018版高考英语复习unit4wildlifeprotection课时作业新人教版》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、Unit4WildlifeprotectionⅠ.阅读理解[2017·湖北八校联考]Researchersfoundthatwomenwhohadgivenbirthmighthaveareducedriskofdeathfromseveralcommonconditionsthanthosewhohadnot，accordingtoastudyreleasedFridaybytheImperialCollegeLondon(ICL)．Thestudy，ledbyICLresearchers，waspublishedinth

2、ejournalBMCMedicine.Itinvestigatestheassociationbetweenthesocalledreproductivefactors—suchashavingchildrenandbreastfeeding—andawoman'sriskofdeath.Researchersanalyzeddatafrom322,972womenacross10countries，includingtheUK，France，GermanyandSweden，withanaverageageof50.Ea

3、chwomanwasfollowedforanaverageof12.9years.Duringthisperiod，therewere14,383deathsoverall，whichincluded5,938deathsfromcancerand2,404deathsfromcirculatorysystemdiseases，accordingtothestudy.Theteamcomparedreproductivefactorswiththeriskofdeathfromseveralcommonconditions

4、，suchasbreastcancer，strokesandheartdiseases.Theresearchersfoundthatwomenwhohadgivenbirthhada20percentreducedriskofdeaththanthosewhohadnot.Itwasalsofoundthattherewasareducedriskofdeath(8percent)inwomenwhohadbreastfedcomparedtothosewhohadnot.Theriskofdeathfromcancerw

5、aslowerinthosewhohadgivenbirthcomparedtothosewhohadnot.Withinthisgroup，theriskwasreducedevenfurtherinwomenthatgavebirthtotwoorthreechildrenincomparisontothosewhohadonlyonechild.“Hormonalmechanismsmayexplainthelowerriskofdeaththatweobservedwithbreastfeeding，andhavin

6、ggivenbirth，asthesefactorsareassociatedwithchangesinhormonelevels，”saidDrMelissaMerrittfromICL，wholedthestudy.1．Accordingtothepassage，theriskofdeathfromcancerislowerinwomenwho________.A．havegivenbirthtonochildB．havegivenbirthtoonechildC．havegivenbirthtomorethanonec

7、hildD．havebreastfed2．Accordingtotheresearch，ifawomanhasgivenbirthandbreastfed，herriskofdeathwilldecreaseby________.5A．20%B．28%C．12%D．16%3．Whichofthefollowingmightbeoneofthefindingsoftheresearch?A．Severalcommonconditionsleadtowomen'sdeath.B．Reproductivefactorsareass

8、ociatedwithchangesinhormonelevels.C．Womenwhohavegivenbirthlivelongerthanthosewhohavenot.D．Havingchildrenmightreducewomen'sriskofdeathfromsomedise