（素材来源：广东省华附、省实、广雅、深中2024届高三四校联考英语试题）
①
newstudyquestionsthefairnessoftheflip.
②
stillundergoingpeerreview,collectedandanalyzedtheresultsof350,757coinflipsin46
thetime.Thisresearchwasdoneinanefforttoconfirmahypothesisproposedearlierby
StanfordUniversitystatisticsprofessorPersiDiaconisandhisteam.Accordingtothattheory,
“vigorouslyflippedcoinstendtocomeupthesamewaytheystarted.”
③
of“precession”,meaningachangeinthedirectionoftheaxis(轴)ofturningthroughoutacoins
Thismakesacoinflipnotquite50/50.
④In2007,Diaconis’steamestimatedtheoddsofa“same-sideoutcome”asapproximately51%.
Nearlyadecadeandahalflater,Bartosandhisteamfoundthisveryresult.Theypublisheda
preliminaryreportstating,“Ourdatalendstrongsupporttotheprevioushypothesis-Thecoins
landedonthesamesidemoreoftenthannot.”
⑤
Diaconisstatedbackin1986,Themoreyouthinkaboutrandomness,thelessrandomthings
become.Butsometimes,youcantakeadvantageofalackofrandomness.Indeed,whenitcomes
asyouseeit.
28.Whatsthepurposeofconductingthestudy?
A.Tofindevidenceforthefairnessofacointoss.
B.Toproveanassumptionputforwardyearsago.
C.Tostatethedefinitechanceofonesideofacoincomingup.
D.Toanalyzetheresultofover300,000coinflipsindifferentcurrencies.
29.Whatdoestheunderlinedwordprecessioninparagraph3probablymean?
A.Progressing.B.Spinning.C.Bouncing.D.Dropping.
30.WhichofthefollowingmayDiaconisagreewith?
A.Thereisnoneedtoconsiderrandomnesstoomuch.
B.Wehavetomakegooduseofalackofrandomness.
C.Whatevercoinitis,randomnessturnsouttobefairultimately.
D.Theharderweflipacoin,thegreaterchancewewillgainitsrandomness.
31.Whatcanbethebesttitleforthetext?
A.IsaCoinFlip50/50?APerfectRandomness.
B.IsaCoinFlip50/50?AMysteriousGuess.
C.IsaCoinFlip50/50?ThinkTwice!
D.IsaC