2019年高考英语一轮巩固达标练题unit2theolympicgames含解析新人教版必修220181017318

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1、TheOlympicGames李仕才***阅读理解Crossingyourlegsisanextremelycommonhabit;mostpeopledon’tevennoticethatthey’redoingitwhentheysitdown.Whileyoumayfinditcomfortabletositwithonekneecrossedovertheother,itmightbecausinghealthproblemsthatyouarenotawareof.AstudypublishedinBloodPressureM

2、onitoringstatedthatsittingwithyourlegscrossedcanincreaseyourbloodpressure.Thereasonforthisisthatthebloodinyourlegshastoworkagainstgravitytobepumpedbacktoyourheartandthatcrossingonelegovertheotherincreasesresistance,makingitevenharderforthebloodtocirculate.Thiscausesyourb

3、odytoincreaseyourbloodpressuretopushthebloodbacktotheheart.Youwon’tfeelanyimmediateeffects,butrepeated,drawnoutincreasesinbloodpressurecancauselongtermhealthissues.So,planningtositforalongperiodoftime?Don’tkeepyourlegscrossed.“Crossingyourlegsatthekneecanalsocausepressur

4、eonthemajornerveinyourlegthatpassesjustbelowyourkneeandalongtheoutsideofyourleg，”explainsRichardGraves,amedicalexpert.Thispressurecancausenumbnessandtemporaryparalysis(麻痹)ofsomeofthemusclesinyourfootandleg,preventingyoufrombeingabletoraiseyourankle—whatweknowasthat“pinsa

5、ndneedles”sensation.Whilethefeelingofdiscomfortmayonlylastaminuteortwo,repeatedlycrossingyourlegsuntiltheyfeelnumbcancausepermanentnervedamage.Sonexttimeyousitdown,trytogetyourselfinthehabitofsittingwithbothofyourfeetonthefloor.Notonlywillithelpyourpostureandstability,bu

6、titwillalsosaveyourhealthinthelongrun.【解题导语】　本文是一篇科普说明文。研究表明，虽然跷二郎腿是常见的习惯，但是该习惯会引起血压的升高，还会导致膝盖以下的重要神经受损。所以不要跷二郎腿，要有正确的坐姿。1．Whatcanwelearnaboutcrossingone’slegs?A．Itisaverybadsocialhabit.8B．Itisusuallypracticeddeliberately.C．Itcandoharmtopeople’shealth.D．Itcanmakeothersfe

7、eluncomfortable.C　解析：细节理解题。根据第一段的第二句可知，跷二郎腿会引起健康问题，故C项正确。2．Accordingtothestudy,sittingwithyourlegscrossedcan．A．affectyourbloodpressureB．resistgravityeffectivelyC．leadtoheartattackseasilyD．improvethefunctionoflegsA　解析：细节理解题。根据第二段的第一句可知，研究表明，跷二郎腿会引起血压的升高，故A项正确。3．Inthethird

8、paragraph“pinsandneedles”probablymeans“”．A．slightlysharppainsB．beingalittletiredC．seriousmuscleinjuries