D

Thiscouldbetheperfectgiftforthepartnerwhoembarrassesyouonthedancefloor.Smartsockswhichcanteachyoutodancemaybethean?swerforanyonewithtwoleftfeet.

Thesockshavebeendevelopedasarunningtooltohelprunnersim?provetheirskills.Thankstothesocksuserscanaccurately(精确地)re-cordnotonlyhowfarandfasttheyrunbutalsohowwell.Itmeanstheusermaximizes(最大化)his/herperformanceandreducesdamagetobodyandpreventshurt.Thehi-techsocksaremadeofspecialfibres(纤维)thatwatchthemovementsofyourfeet.Theylookfeelandcanbewashedlikenormalclothes.

Sensors(传感器)recordeachmovementandsenditbyanankletrans?mitter(脚裸发射器)toasmartphone.Thena"virtualcoach"applicationshowstheinformationandcantelltheuserswhattheyaredoingwrongaijdhelpimproveskillsinanytaskwithfeet.

Thesocksshouldbeusefultoathletesandweekendjoggers."Peoplethinkrunningissoeasyandofcourseeverybodycandoitbutnotnecessarilysafelyandwell"DrDavideViganosaid.Arecentstudyshowedthatbe?tween60and80percentofrunnersgothurtperyear.Thisisprettymuchmorethananyotherhumanactivity.Researcherssaythetechnologycanalsobedevelopedtoteachpeoplehowtodanceplaysportssuchasgolf?oreventohelptoteachwomentowalkbetterinhighheels.

MrViganosaid"Peoplecouldallbenefitfromtheidea.Wehavehadinterestfromallsortsofsportslikeskiingfootballcyclingandgolf.Anythingwhereyouhavetouseyourfeetcanuseit.Itcouldevenbeputinhighheelstohelpwomenwalkinthemsafely.，，

Socksarejustthestartandthetechnologycouldbeusedingloveshatsandboots.Thesocksankletandsoftwarepackageareexpectedtobesoldforaround$120，whichwillgoonsaleinMarch.

12. Whatdoestheunderlinedpart"anyonewithtwoleftfeet"referto?

  A. Peoplewhoaredisabled.

B. Peoplewhoareinterestedindancing.

C. Peoplewhoarenotgoodatdancing.

D. Peoplewhoinventedthesocks.

13. What'sspecialaboutfibresthatthesocksaremadeof?

  A. Theyfeelmuchsofterthannormalclothes.

B. Theycanmonitorthemovementsoffeet.

C. Theyareexpensivetoproduce.

D. Th