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1、河北安平中学实验部高一年级英语学科寒假作业2019年2月10日第一部分阅读理解（共两节,满分40分）第一节 （共15小题；每小题2分,满分30分）阅读下列短文,从每题所给的四个选项（A、B、C、和D）中,选出最佳选项,并在答题卡上将该项涂黑。AIsItBadtoCrossYourLegsWhenYouSit?Crossingyourlegsisanextremelycommonhabit;mostpeopledon’tevennoticethatthey’redoingitwhentheysitdown.Whileyoumayfinditco
2、mfortabletositwithonekneecrossedovertheother,itmightbecausinghealthproblemsthatyouarenotawareof.AstudypublishedinBloodPressureMonitoringstatedthatsittingwithyourlegscrossedcanincreaseyourbloodpressure.Thereasonthishappensisbecausethebloodinyourlegshastoworkagainstgravitytobe
3、pumpedbacktoyourheart,crossingonelegovertheotherincreasesresistance,makingitevenharderforthebloodtocirculate.Thiscausesyourbodytoincreaseyourbloodpressuretopushthebloodbacktotheheart.Youwon'tfeelanyimmediateeffects,butifyousitforlongperiodsoftimeit'simportantthatyoutakenoteo
4、fhowlongyouhaveyourlegscrossedfor.Youshouldn'thaveyourlegscrossedformorethan15minutes,andit'simportantthatyougetupandwalkaroundatleastonceeveryhour.Crossingyourlegscanalsoleadtoneckandbackpain.Ideally,it'sbestforourbodiestositwithourfeetplantedflat,hipwidthapart,onthefloor,b
5、utit'snoteasytomaintainperfectposturealldayattheoffice.Whenyousitwithyourlegscrossedyourhipsareinatwistedposition,whichcancauseoneofyourpelvicbonestorotate.Sinceyourpelvicbonesupportsyourneckandspine,thiscancausepressureonyourlowerandmiddlebackandneck.Youalsomightnoticethatw
6、henyousitwithyourlegscrossedforlongperiodsoftimeyourfeetandlegsgettinglyorhavethefeelingofbeingasleep.Thisisbecausewhenonelegsitsontopoftheotheritcausespressureontheveinsandnervesinyourlegsandfeet.Itcancausenumbnessand/ortemporaryparalysisinthelegs,ankles,orfeet.Whilethefeel
7、ingofdiscomfortmayonlylastaminuteortwo,repeatedlycrossingyourlegsuntiltheyfeelnumbcancausepermanentnervedamage.Sonexttimeyousitdown,trytogetyourselfinthehabitofsittingwithbothofyourfeetonthefloor.Notonlywillithelpyourpostureandstability,butitwillalsosaveyourhealthinthelongru
8、n.21.Accordingtopara2,wecaninferthat___________A.it'snobigdealtocrossourleg
