【Thebabyisjustonedayoldandhasnotlefthospitalyet.Sheisquietbutalert（警觉）.Theresearchershaveplacedawhitecardwithtwoblackspotsonittwentycentimetersfromherface.Shestaresatitcarefully.Aresearcherremo】
Thebabyisjustonedayoldandhasnotlefthospitalyet.Sheisquietbutalert（警觉）.Theresearchershaveplacedawhitecardwithtwoblackspotsonittwentycentimetersfromherface.Shestaresatitcarefully.
Aresearcherremovesthecardandreplacesitbyanotheronethistimewiththespotsdifferentlyspaced.Asthecardschangefromonetotheotherhergaze（凝视）startstoloseitsfocusuntilathirdcardispresented.Thethirdcardhasthreeblackspotsonit.Hergazereturns:shelooksatitfortwiceaslongasshedidatthepreviouscard.Canshetellthatthenumbertwoisdifferentfromthreejust24hoursaftercomingintotheworld?Ordonewbornssimplyprefermoretofewer?
Thesameexperimentbutwiththreespotsshownbeforetwoshowsthesamereturnofinterestwhenthenumberofspotschanges.Perhapsitisjustthenewness?Whenalittleolderbabieswereshowncardswithpicturesofobjects(acombakeyanorangeandsoon)changingthenumberofobjectshadaneffectseparatefromchangingtheobjectsthemselves.Coulditbethepatternthattwothingsmakeasopposedtothree?Noagain.
Babiespaidmoreattentiontosquaresmovingrandomlyonascreenwhentheirnumberchangedfromtwotothreeorthreetotwo.Theeffectevencrossesbetweensenses.Babieswhowererepeatedlyshowntwospotsbecamemoreexcitedwhentheythenheardthreedrumbeats（鼓声）thanwhentheyheardjusttwo;likewise（同样地）whentheresearchersstartedwithdrumbeatsandmovedtospots.
1．TheexperimentdescribedinParagraph1ismainlyaboutthebaby’s______.
A．senseofhearing B．senseofsight C．senseoftouch D．senseofsmell
2．Whatdoestheunderlinedworditinparagraph2referto?
A．thecard B．thebaby C．thecomb D．thekey
3．Accordingtothepassagebabieshaveastrongsenseofchangingin______.
A．thesizeofcards B．thecolourofpictures C．theshapeofpatterns
D．thenumberofobjects
4．Whydidtheresearcherstestthebabieswithdrumbeats?
A．Toreducethedifficultyoftheexperiment.
B．Toseehowbabiesrecognizesounds.
C．Tocarrytheirexperimentfurther.
D．Tokeepthebabies’interest.
5．Wheredoesthisp