第十八章 随机抽取（2 / 2）

PmMvPCBwcC5waHVmYW54LnovLzpmY2dndZq874iJ57qc5ouJ5oKA43BwLnBodWZhbnguampqLy86ZmNnZ3WavO+Zq+esnOaPl+i2lOa3r+g+Yzw+Yy88DaaA4qaA4q+Y5raE55+r57WB54Kt6aq45Jm/6D5jPD5jLzwNgoDjhrrkj73khpHlvYPpqIXlkK3ltojnn7rpnojokJTlgYDjtoTnnK3lkJTljLzvmI/lgLjkrr7lrr7lsonouIToiLjltYHnoLzkjLzvg67lsIjli5znvJzngLjkrKznPmM8PmMvPA2CgOONieWinemWu+SGuuSonOWwjueIkeWOuuSIu+efueS1geeCremEmueinemMh+mMvO+vkOWAvOWoheWMruWDkOe1geeCremquOS0leaMvO+blea2lOaLp+WAvOWJheW9mec+Yzw+Yy88DZ+876KR5Yi55IC75K+Y5p+r57ap54y877WB54Kt6aq45IC45Kys54Sa57G35aqH6Iy877WB54Kt6bS55YGN5Yy874OQ57WB54Kt6YSa56+Q5YC85ZC45pC45qOC6YCd56+b56e055+66Z6I6JCU5T5jPD5jLzwNgoDjhJrnlo/lvYrmvaXliLnko4Lpr5jmjbjktoTnnJ7mtYHngq3ptLnlvpnnhJrnh7jkvpnnvr7omKvpt7vkrpTljLzvkK3lv4TlvqHpt5zniZzmobLmtqnniLvnqaTlirjkjLzvr7vpgLjknqXnvJzntoTnnK3lkJTlPmM8PmMvPA2dgOKCgOO1geeCrem0ueWBjeWcgOKavO+Tgem5vuiBl+aonOWIuOW1geegvOSMvO+wjue6h+WJheW9meewiOWLnOc+Yzw+Yy88DYKA46+Q5YC85a6k5a245I675JO855O854OQ57WB54Kt6aq45LSV5oy874e/6KqX6ZKK6ImF5YSa56665LSb5oic5YC45Iy8766954295K6k5a245IOQ57WB54Kt6aic5Yy877KJ6L2Z54a65JCI5piP5ZKK6ImF5YSa57qH5ZGP5aOV5oq45IOQ57WB54Kt6Yy877aX5pm/6Kic5aOt5j5jPD5jLzwNn7zvopHliLnkgLvkr5jmn6vntqnnPmM8PmMvPA2CgOOAneeoiuWEmueuvuW7veionOW1geeCremjgumOkOW2hOeMvO+wjue6h+WvgeaUsOa9keWflOeEmueht+aht+aJnOatuOSDkOe1geeCremjgumonOWMvO+wiOWJp+ifhOa+mOaOmOafuumeiOiQlOU+Yzw+Yy88DYKA46ic5Zit5YSa56Kd6YyH6bCI5Yuc55+k5b2D6I+757K35aa655Ca6Yy8746Y5o+A6ZC45pCA6ZO95IOQ54Sa54Gw5Yav5ayc5p+O5Yy875KK6ImF5YSa56G35qG35rqH5ZGP5aOV5p+55Ku66Kyc5oOQ57WB54Kt6YKA44q45IOQ57WB54Kt6aOC6aic5YCA6KeF54y874u45L2Q6ImF5YS76YSa54yS5ZSf5pOB6YC45Iy8766S6YmM5qiK5YmM5j5jPD5jLzwNgoDjtKTluYLnhrrkuYLnlrvkkZDlhJrnsYrlk7zpobvmhYXltoTnnK3lkJTljLzvuIjnuIjni5zni5znn7rpnojokJTlPmM8PmMvPA2fvO+IueSAu+SvmOaavOSfq+e2qeeMvO+zi+aMj+WGuuSntOellOaBpueNuOSfueS2l+akreaMvO+2hOecreWQlOWvmOaXruexsOWMvO+gvOWntOefuumeiOiQlOW0r+iriOU+Yzw+Yy88DZ2A4oKA44Sa56C95I665J6x5a+Y5qmI5YOd5qq45Jm/6ISa57WB54Kt6bqH5b6U5oqH6YKA44a65LqH5YyA6LOj5bSg55q85LGw5bWB54Kt6YSa56C95Iy874q45IOQ57WB54Kt6aq45Jm/6Kic5YCA6KeF55KK6ImF5YSa56iZ5aq75IqK5oy8766S6YmM5qq45Jm/6KiK5YmM5pyA4j5jPD5jLzwNgoDjn7rpnojokJTlmbvnkoDpjLzvqJnlqrvkhJrnor3lhpzlraTmqrjkgLjkpZ3mv4vmiLjltYHnoLzkgoDjjYnlop3psrrktojnhrrksIjlnpvlsJbmjYfplrvkjLzvi7jkhYPmg7/loLzlp7TnhJrnt6Dmmb/or5jmsbDlPmM8PmMvPA2BvO+KleW1geeCremquOSAuOSsrOeEmueRiOavmOaGsOWxsOWMvO+quOSZv+iMvO+GuuSwiOW/i+aOuuSIu+c+Yzw+Yy88DYKA46yI6IC45J2u5Y2P54Sa57W06J2u5YCc5oq45IyV55a45Kq45Jm/6ICd54uc56+Y5o+D5bGw5Yy874Ou5YCd54uc54y877Cj5aCH5a+B5piW5YSa54O/5KWA5p+66Z6I6JCU5Yy874OQ57WB54Kt6YSa56245ICA5oCd57GK5rCc5ae056e05z5jPD5jLzwNnYDigoDji5znu47luofljLzvp5DlsLXonIDiPmM8PmMvPA2CgOOWu+SZu+eSgOmDkOe1geeCremanuajgum6h+WWj+WMvO+lneaHv+iwteiIuOW1geegvOQ+Yzw+Yy88DYKA46yI6IC45JO86YKT5oKm5bO36IO/5Yy877SX6baX5oC45Iy877uO5Yuc57Sk5a2J5oy877yc54yP5YC85YGd54Sa54av6I+E5ou45J+66Z6I6JCU5T5jPA==