第二十一章 变量与可能（1 / 2）
PmMvPKaA4qaA4re15pGE6Ie/6Ky96Ku/5Z6j6ba75La75IC45Leg5reg5oC45LuI5aSt5oy874eJ546i56+B5qG/5ISa54+H6aek5YC+5aW75D5jPD5jLzymgOKmgOKnl+awluaBgOObiuWggOmbiOWBgOO9keWflOenhea6meaBgOODv+WBgOOpiee7tOaBgOOPh+mYj+WBgOOLteaEoumvj+WNuOQ+Yzw+Yy88goDjkZnog4DomZ3pia7lpZ3mi7jknIHltoXlsZTnu7vkjLzvrpfpoq/ohrrknIHlgprmsJzlo7bohq/olqTlhojljLzvsonoi7nkorTnnYDmvbvko4LphJrnirjkop3plrvkhrrkj4TmmZXnvpjmjpjmprrkkYDjnqXnu7jkkIDjnr/osbDlPmM8PmMvPIKA46q7552A5rCJ5pOJ5r2D6I245I2G5Yy877aQ5Yqa6IKm5Ya754y8772Q6I695KGy5rGa6bmC57mC54C45Iy877uO5Yu45Ia65Jmd6Ymu5au/5Z6j6bGw5baE572/5Zu95L+75LuI5aSt5oKb5aeW5Zu65KOC6YSa54q45Jeh6Lm+6LOA6Iy876iK5YC45LW/5YO/5T5jPD5jLzyCgOOlneaLuOSGuuSQneWKuOSFpOa/lemxheWsheWgvOWAuOSEmueBl+amuOWWjOW/u+e5vuivt+iRv+iEmemonOWngOaitOeAmOaOu+mMvO+wgeevp+eEmueinemKuOSavOSGkOe7juWJnOahsuafueSMvO+bnOaAuOSzj+Wmt+WMvO+clem8nOe2ieaGuuS2ieY+Yzw+Yy88goDjiq7muYnnlqTlvKDml77lvpjmm7rkiZzmsbDls4PmnIznqrjkmb/ohJrnpZ3muoflprnotoTngarni7jkvJznPmM8PmMvPIKA46eF57mv5bib56S45D5jPD5jLzymgOKmgOKOkOWdgOKngOa9g+ivj+WcgOK5gueAuOSvmOaKuOSotOisnOaMvO+dgOKijeaRheWcgOKEmuetuOSLueSruuiqh+i3iOaolOeGiOWog+m8lua0uOSNmemMvO+CseaBpuiEmueepee7uOSnheedvuSGuuSwiOWJp+ifr+WTveWMvO+NieWFueSNuOSwiOW0m+eMvO+dgOaPhOaEmue4vOS2u+Wvt+idgOainem5luaquOSZv+iRkOWJnOahsuaYv+ilneasnOaeruW2heWWu+SMvO+ZgOW2l+aEmueLp+WAvOWAuOQ+Yzw+Yy88goDji7XmnIznhJrnirPnoajmiLnkgLvkm7rkhrrksIjliafon4TmhJrnkJTpj5XmsrflurrkiZzmjLzvhKTlsbfmqrvnnYDmPmM8PmMvPIKA44a65LmW5rCc5YSa54qu5rmJ54i55IC75Imc5rGw5Y655Ly85KKd6YyH6aaA4qaA4p2v6ISa57Ku6Leg5pm/6Iy874i55KOC6T5jPD5jLzymgOKmgOKapOWqpOWXvuWYq+mBpui+mOaOmOaxsOWmuuWLqOeMr+WwuOSEmueTveS3heW2heWMvO+dgOKPh+mYj+WcgOK0r+iFgOiWiOaMvO+ngOaZluaEoumvj+WNuOSNp+eZv+iMvO+KuOSruui9keWflOeEmuebiuWggOmbiOWEmueHjeWKuOStluaNuOSGuuSJnOali+aMvO+RiOaqh+iOuOSnhea6meaKuOSmuuWLqOeNp+eQn+aGuuSHpOW3heW2hOeyt+WonOWMvO+pieeflOeEmue8r+W7uOS6uOS9g+isnOalu+SvuueVjeWLueSUr+aMgOg+Yzw+Yy88goDjp4DmvYPor4/lhJrnnYDimZTpuoflnIDil5HoiZzmmrzkjbjkprrkjLzvqYnni7rkhJrnsJbmuoflnYDioIDpm4jlnIDiirjkgKHnup/lhJrnp5fmqJzlrIjoqYnnu7TmgqbllbPmoJfmr5jmqYnnu63mjLzvsq7opZ3mhJrngqfotJvngJzmkbDls4foPmM8PmMvPIKA47Sv6I245IiF5YSa56WI5T5jPD5jLzyCgOOotOingOaEmueZluaEoumvj+WNuOSNp+eZv+iJnOa3heWavOSNieaMvO+dgOK1geeflOecgOKEmueXkei7tOaJnOavlOWMvO+piee7reaEmueBteaQgOmis+aomumMvO+Yj+WNuOSQiOaAuOS8luaDvui4m+eMvO+GuuSvmOY+Yzw+Yy88goDjnYDij4fpmI/lnIDiPmM8PmMvPJSA4pSA4oex5o2v6ISa54Sk5b2l5bCI5bCB5qq45IC45Ia65Ie/6KCO5oSa56yI6KqX6YC45ImF5bWB57aE572/5a245Le15pGE6ISa55a75Iy877uI5YC45Jm/6LCI5bSb54y877mC54Gm6I+95JOK5qOt5p+c56qc5qa45Iy874ai6YGm6Je+5Y245Ii754un5YiP5bSN5Yy874OA6J2A5qa657Ga6YSa57y85Lux54e/6Imc5pGw5ZGw5Zqk5Zqk5b++5I2J5aSt5oy875yT57uC5Z6d6aa45LaE56qH6ICY5o676T5jPD5jLzyCgOO4uue3iOaXqueEmueEluiEluiCseWAuOSjgumGuuS0oOe5guerouiXvuW9v+WMvO+ln+ekruiEmueKs+ehqOaNp+eQn+avmOabveS/u+Q+Yzw+Yy88nYDigoDjj4fpmI/lpoDipoDihJrnrbjki7nkmZbmhKLppYXls7rnsJXmvbDlu47lr4Hmob/khJrnkJnpiZzmpbvklbPmoJfmjLzvtK/ohYDolojmnIDiPmM8PmMvPJ2A4qaA4qaA4qeA5pmW5oSi6a+P5Y245JyA4j5jPD5jLzydgOKCgOOngOaZluaEoumvj+WNuOSmgOKmgOKGuuSrkOW0lei/vuStuOS2heWMvO+PvOWhqOa6uOSMoeiGuuSNk+WxveWlreaAuOSbv+idgOaDv+WEmueNpOWBuee6uOSgm+WIj+WMvO+DgOidgOaNp+eNp+eGuuS6h+WflOeMvO+oiuWxqem9g+isnOaxlOevuueVjeWNhuWNuOSMgOiruuigiuWnhea6meagm+WMvO+PgOO7s+eTveSOgOOEmueMsua3t+aquOSAuOSvmOaKuOSotOisnOa6uuSMvO+yruilneaEmuefu+e8rOe6uOSgm+WcgOI+Yzw+Yy88goDjpZ3mt7XohrrkrrrkkLjmkLjmtI3lnqXnvJznjI/lo4LpjLzvlb3kurjkpZ/njbjkPmM8PmMvPIKA44u45IC45Ia65K+75pyB5bCc5Z2A5oCJ5omc5qWL6Je+5b2/5bq65Imc5j5jPD5jLzydgOKmgOKmgOKageW3oOajgumGuuSQiOaYj+WZlOm6h+W0jeWLieaMvO+ageW3oOaZv+iBpuizg+avmOazh+ialOeMvO+PgOOageWIueSZv+izg+aRiOaOgOOxsOW2hOe9v+WEmuexlOeGkOegl+arr+a8vOSLnOeMvO+YvOeomumEmuePhOaonOWNuOSMvO+GkOeDv+WNj+WGgOmMvO++uOSLueSepeewteiMvO+oiuWdoei9g+isnOaCpuW4r+iCgOOUuuW5r+WdgOaDv+WOuOSoheWMruWenemmuOSmuuSeruW2heWMvO+ruuisnOa6uOSMoeiEmue6uuSsi+aFjOWcgOI+Yzw+Yy88nYDigoDjhrrkua/ll77li5znr5jmtK/ovYPojbjkn7nkhr3kjLzvmZTpi5znr5jml67nvYPojbjkjLzvop3pqojmqrjkgLjkkJ/mhJrnk73kg5Dnmp7mgLjkhrrksIjli5znj4PlsbDlmb/ojLzvnYDmg7/lqI7mkoDljIDoqIrljKHopbvknIDiPmM8PmMvPJ2A4oKA46C056Cb5YKd5o2k5Zu65KqT5Ya65LCI5a+J5rWJ55O95LeF5YiP5bSX6a245Iy874Sa57OD5oi55I6A5q+Y5p+r57ap55a75LqH5a2W5qSI5b2D6I245IyA6Iy875GQ5Y+E5ryv5bu45ISa57SX6aye56q45KOC6Y+A46mL5omK5rqH5ZqB5Y6A46Ot5p+c55a75LCI5Yuc572D6KqP5bGw5Yq45Ki06Kyc5oy875+v5YKn6LuO5a6N5rCV5qiK5Yyh6ISa57q65Ie/6JqA6aC95JyA4j5jPD5jLzydgOKCgOOWjOWYj+WEmuewnOWGpuippOW7v+eGuuSflOeRj+WMvO+tuOSLueSsnueAuOSEmueliOWGiOWRsOWapOWgl+amuOSOkOWNieWZv+ionOW/vuS4ruiWiOaMvO+DgOidgOaEmueWu+SMvO+PhOaDv+WEmueWu+S6uOSgm+WCgOOMkOWNuOS2hOeqiOa/vuS4rui0heWSp+eAuOSOkOWMkuWMvO+pi+aJgOmEmueageWWu+SSp+eAuOSNieWMvO+NieWinempi+aJgOmquOSAuOSMkOWwiOW+lOa6uuSquOSAuOSHsOWgveSMvO+QreWLvuSEmueVjeWArueIvuWquOS+uOScgOI+Yzw+Yy88nYDigoDjhJrnmLvnj4/msJXmvbDlvYPogInmro3msJXmuYLngLjknp3pprjksbDljLzvmIrmorPmlozlmI/lhJrnrbjktoXljLzvv6XonLjkhJrnp4DmqIrlmI/ll5HopZbmhYXljafnr5jmg7/lurrkjLzvnqXnu7jknIDiPmM8PmMvPIKA46G35qG35rKJ6J6l56eX5p2+5ICY5o676Yy874yD6IqE6JGQ5YG15rSX6Yqi6ae+5I675ImF5bOY6Zub572C57275KOC6bGU57u75Iy877qp56mk5byc54C45Ia65Juc5rSk5ayK5j5jPD5jLzyCgOOFg+aLuuSEmue0pOWYjuWgl+aNp+eZv+iageW7juWHpOWGh+WNuOS2hOe+mOaWu+Q+Yzw+Yy88goDjhrrkgLjkiYDpjLrkrbjki7nkurrkhZfnnqXnvrLnhYDolojmr5zmuonourjkjKHoiZzmqo/ln7nklYDmkIHmjLzvpZ3mi5znurrkg67lqJzljLzvkK3lt5TntLnlkp3phJrnnYDira/oqofogKjoqofonIDilLDmuqnnl5Houa/lrZbmjbjkmL/ovrDlrKnpl5Hon53mqrjkgLjkjLzvn6vnla/mPmM8PmMvPIKA44Gn6I+E5oSa55a75Ia65LqH5bKc6aih6I+85aK95YSa56+v6KCX5rqi54aH5bq45LSb5o2n54C45KW75L++5J2A4oCo6K2v6JyA4oSa54iV5pir6YyA6Lux56aP5Y2n55m/6Iy877Cj5ZGP5ZSw5rqp56iK5Yec6aa45bCj5amJ55+U54Sa56+655WN5byW5oO+6Lib54y877qH5YyA6KOV5pGP5aiK5bu45J+Z6KG/5Iav6I+E5r6Y5oW15oSa56245Iu55J6l576y55eR6LS85D5jPD5jLzyCgOOdgOKjj+WAvOWcgOKEmueKuOSJueSPhOaCp+iiruWJnOahsua3oOaMkOWAmOaOu+k+Yzw+Yy88goDjtJfptpfmhJrnirjkupzmi4nmvJzngLjkhrrki5znprjluqHpiI/ljLzvr67ogK7nsYXlrIXlhJrnnYDipoDipoDiuaHpiYDpk7vnnr/okq/mhZfnpZ/nqpzmu4fluYLnj4TmqJrpv4vlt6/ojLzvs4Pml5HoqIXlia7lopTnobLoq7rourrkhJrnqILmhrrkurjkjLzvjKHom5vnk7vnnr/oqJTnlLrllbPmnp3pio/ll6rpiK/onLvnkb3nn5zmkb/ojLzvuqTnkI/mqIXlia7lnIDihJrnpZ3muoflkoblsJbmoZ3mo4LphrrkiY7mkojlj4TmqJrpPmM8PmMvPJ2A4oKA44qV5bqi54aH5Ye/6Kqk5a+Y5o245Ka45LGw5Yy874+A46eA5rq65I6A44Sa56Wd5rqH5Zi754+P5q+B5qG/5K6N5rCV5qW75K+655WN5aC95Iy877Sv6I2J5pGI5qW75ICJ5qaA4qaA4pyA4j5jPD5jLzyCgOOmkOWuveevj+WNuOSkrea5r+W6uuSJnOY+Yzw+Yy88goDjnYDikYPmkZbnnIDihJrnhKTlvaXlsIjlsIHmuYLngLjkhrrkuoflsI7nrrXmr5jmp5fmnb7kjLzvrbjkv7rnsKPlhJrnorPmoJfmlbrkpI/llLrlrJzmo4LpnqXnu7jkPmM8PmMvPIKA46245LOA6L6c56yQ5Y295Jm/6Ia65KWF5b2Q6IaH5b6y54y877mX6aeW5YSa57SX6bSk5Zeh6Ia65Ie/6L+p57aE54SC5oy8752A4rOf6bCj5ZyA4rmC56OC6YSa57CI5ayQ5Z+k5b2D6Lq65IC45ICY5o676Ymc5qqP5a+Y5qeX5p2+5D5jPD5jLzydgOKfvO+6uuSEmueLuuSPsOW3oOaZv+ihrue7juWLiea6h+WoiuW7uOSavOSvmOaNuOSmuOSOueS8vOSoguaMvO+tluakiOWEmueLnuWhqOaujeawlea6uOSMoeinheedvuScgOI+Yzw+Yy88goDjnYDiiYXlrpvnnIDihJrnor3loJfmtoTnkbXmk4HpgLjkhrrkpJnplIDilIDiPmM8PmMvPIKA44a65K+Y5rGw5Z2A4oGn6Iuc55yA4r2D6Lq65Imc5qGy5qa45J+55Iy874q45J6u5Yu65Iy877aE55O95aaA4qaA4j5jPD5jLzyBvO+ikeWLiea6h+WJueSXu+S+nOekvueck+eDkOWEmueHv+ivt+iZv+iWu+Sarui4pOWHjOaHi+anpOW3teiWq+eXvuWYv+izh+ialOeMvO+Fl+ebr+aIueSAu+S6h+WNuOSRjOafueSGuuSLnOeBsOi7u+SMvO+lneaLuOSXpeWAuOS3oOaZv+iMvO+fq+eVr+Y+Yzw+Yy88goDjj4TmobvmiL7lpK3mua/llrvkPmM8PmMvPIKA45Wx5ZGP5YaQ54iQ5YSa57+d5r+d5rq66LuO5bCc5Za55Ja55L2D6KqP5Yy874qP5Y245KWd5o2G5Y+757K35YqN5Zqk5Yy877aX5qKZ6buM5YGA6Y2G5Zii6a6X6bCO55GP5bCI5Ymt57mW5rmv5Ya65I2F5b+B6aSt5rGw5T5jPD5jLzyCgOOdgOKQkOWsguWGkOepieecgOKEmue7iOWxt+ahseiwjeWXpeWAuOSGuuSlnearo+WHi+WEmue2l+ahruiSgOWRj+WGiOearuWEoumlheWbv+iBpuirv+WPu+eyt+WfueSQpOmXpeWdgOKSr+atuOS+sueShemPh+mHv+igiuWUreW/qeeDg+icgOKXkeiev+iMvO+dluWXkei3t+aShemkleWShem9meegiuWFlOmrgeejvui5iee8luaileaNveSjgumZu+e/vuS6oemMvO+vneaShemEmueKuOSLiea6uuSliOWGuuSOoueTieawnOWDv+WEluWRj+WnpOWGhOi+ueSWu+Slu+SAieaMvO+mi+ibl+eIueSjgum6uuSliOWXvuWNuOSBp+iMvO+EluWDv+WAmOaOu+k+Yzw+Yy88goDjiYTnp6Tlq47ohJbljLzvhJblgLjkjKHopZfmk7DogInmPmM8PmMvPL2D6K+P5Y645I+H6ZiP5aCr54C45IGN5Yy65Kys5z5jPD5jLzyNkOWaveQ6hYDonL3kprrltLvnkJnpoJfmhJrnnqXnu7jkPmM8