第27章教学（3P）（1 / 2）

PmMvPA2CgOO9kOiKo+eXvuWiteivmOaYv+iMvO+/lemEheWvmOafq+eVr+aGveQgPmM8PmMvPA2mgOKmgOK0pOWOo+mGuuS9sOW6h+W0m+eArue6uuS3lOeBgOiZv+ggPmM8PmMvPA2CgOOhu+aNuOSwiOWfhOabkOemuumku+SMvO+ytuaXseaEmuePh+mRsOWKuOSdoumMkuWUreWinemEmueZnem3huWgs+afseavmOaOkOWruui5peUgPmM8PmMvPA2CgOOzn+mkoumEmueRk+WZsua6h+WWiua9g+i9g+mlheWhsuahrOaAuOSPr+aEmueWu+SMvO+MiOiEmuevveiiuue6h+WynOmuvuWWsOW/vemMvO+WmOmFteaum+eMj+W5peUgPmM8PmMvPA2CgOO4hOiEmueuuuSnheezm+m5nOmyiei2k+mrouiZhuefseaAneebnOa+oemqj+WWu+SMvO+wiOWTkOWrouiJnOahsuabkOemuumMvO+6qeecpOWGuuSOoue7h+Wwo+W3m+mEmuenpOWot+UgPmM8PmMvPA2CgOOtuOSLueSwnOWvveils+a/uealheWPuOiMvO+lheWhsua5oOa0leaOkOW2hOeMvO+UsOa3huWjj+WAuOS4kOWSgOWWu+SpruifhOa5o+iFjOWEmueGr+WGu+eMvO+0pOWfvumquOSKjeWlheW2oemIheWWu+SMvO+QiOaMruWyt+WRu+amtuaMvO+jk+eAh+iEmueZhuefsea3teiYieatuOSLieags+afseaOu+SMvO+lreagh+WGuuSqjOaNieWdnOaAneeqt+iWu+QgPmM8PmMvPA2CgOOWu+SDv+SsguWonOWgs+afseadgOKCgOOnkOWlneabv+iMvO+IueSAu+SyueWAneejhOacgOIgPmM8PmMvPA2CgOOJs+aLueSQueSrv+WEmuext+Wqh+iLuOSZlee2ueWMvO+tuOS2heWlheWNnuiFvuWKj+WNuOSrv+iWu+Sku+SMvO+KuOSVjeWKuuWonOW9kOilsualsuaFt+aFt+aMvO+6h+WBtea0qeeJguiOu+Sytua0sOaEmue5jui2meaMvO+0l+mLueS/heinpOWEmueAvOWwjuaLieaqj+WkuOSrouiMvO+/iuW/p+WEmuexueSrt+aIj+WzruWgl+a6h+WGkeaNieWinemWu+SonOWjreaTveSvuui1heWok+WOvueLueSFr+aaiOWngOazpeWhu+aFheW3heWZv+ggPmM8PmMvPA2CgOOLnOe9peWEmuetuOShseizg+aUr+YgPmM8PmMvPA2CgOOHieeyrOaFg+avmOawjueRj+WLuOSQneWcnuaTu+eMvO+opeeEmuexveW1lOegvuSmreaGuuSwueSxt+Wqh+i6uOSlu+SWu+QgPmM8PmMvPA2CgOOGuuS0m+e9g+mbnee8nOeVueWAuOSZv+i5r+WinembkOemuumMgOggPmM8PmMvPA2CgOOlneawo+W6h+Wrj+WwnOWAkeWAkeW/kuW/kuWMvO+PvOS3teiLuOSKuOSjj+W4g+iEmue5peWMvO+oo+eYiuaRj+WIhOaZhuefseapruimreWZleakreaCpuUgPmM8PmMvPA2dgOKCgOOzruWJjuWXvuW/ueaxsOW3oOaZv+iMvO+LnOegveScgOIgPmM8PmMvPA2CgOOPu+m/uea7heiGu+eMvO+Nk+Wwo+WEmuexueSrt+a6h+WRj+WLuOSEvOW+i+WHjOaLieaonOWTveSytuaEmue3oOacnOiMvO+0l+mLueSdvOeJguiEmuemtua/uea5peWwiOWlneaFmemwheiOu+SHjOaLieaEmuegs+afseadgOKmgOKmgOKInOWAneeTieaPh+m9sOWZgOW2l+aEmue5luawnOWquOSZv+iFs+ecgOIgPmM8PmMvPA2CgOO/heiMj+WAvOWeleabkOemuumAnee5r+WMvO+Mh+mAgOags+afseaonOW6uui5peUgPmM8PmMvPA2CgOOIg+eIhOaUvOaIhOaDruWLnOezg+aqj+Wsu+SWu+QgPmM8PmMvPA2CgOOoiuWis+aEmueFhuWTveS5peWvgeazueWPhOagl+a9g+m6uuSquOSAuOSPr+aEmue6nOWonOWGveSMvO+FkOa7v+eFg+agl+aroui3teayrOaMvO+htuaLl+aEmueFg+aAv+aEpOWruui5peW8vOS9peWMvO+fhOaJruWNuOSNp+eJnOa5peWprui4keaaiuaEmueZnem3huWMkuWJheWum+eEmuejvuitg+cgPmM8PmMvPA2CgOOapOWfnOedr+ifuuWdgOKmgOKmgOKgveSgs+afseacgOIgPmM8PmMvPA2CgOOoiuWAv+aZhuefseaku+S0m+a0tOi4m+ekguiMguiEmueljua0m+e2l+azueWUr+aMvO+Dh+e5gue0l+msnueroui/vuSMh+mqk+WMvO+Mh+mqk+WwiOW0r+iWu+QgPmM8PmMvPA2mgOKmgOIgPmM8PmMvPA2dgOKmgOKmgOK7s+ezheWhsua5gueAuOSNh+mMvO+ko+iFhuWAneeUmumolOeNuOSMvO+wouemp+iljua0m+erouiirOacluW5peWcgOIgPmM8PmMvPA2dgOKCgOOMh+mZv+iJj+aAneeft+iBpuiZgOW2l+aEmueUiOicgOIgPmM8PmMvPA2dgOKCgOOVmeazueSUiOiBpuiMvO+fhOaPleaNuOS0pOWzueS5vuizj+WcgOIgPmM8PmMvPA2CgOOluOSEuuWCgOOJguafhucgPmM8PmMvPA2CgOOmuuWBgOaEmueTveSruui5peWFvuW5r+Wgs+afseaBp+ilqueSp+iGp+iEmueFgOiCp+iBl+alu+S2ueWMvO+7gOievueEmue0jeWYv+WrouiNp+eJnOa5peWpruiZv+iMvO+Gp+i5r+W5peWMkuWIueSOgOaNuOSWu+QgPmM8PmMvPA2CgOOhs+aUsOaAneeShuWMh+mRhOinpOW5peWonOWFg+aAv+aEmueCvOWHpeWMvO+TveSruuiEmue5peWNu+eLu+SwnOWDguiluOSHlOW0mOWEmueTveSLq+eMj+Wjgumgs+afseaAneeLnOe5peUgPmM8PmMvPA2CgOOLuOSAuOSGuuSWiuaXvuWxlOeNuOSZhuefseaMvO+fhOa7uumlhemEmuenpOWBnua0pOWzueSZu+emuOWHjOaHi+aEmuenjOimuOWZs+eXsucgPmM8PmMvPA2CgOOWpumzueSLuOSAuOSGuuSmk+apkeaHjOaHi+aolOeNhuWMvO+GseiMseiSsueAuOS3teihjeaKuOSwnOWOu+SPg+WMvO+oiuWTkOauvuW7veiMvO+0pOWzueSPveSPjeaLieaEmueWu+QgPmM8PmMvPA2dgOKCgOO9peW7kOWljuaUr+a9g+mMh+mZv+iUiOiljua0m+eMvO+ShuWfhOaqpOWNuOSPiOaNieWEmueKs+ePu+m5r+W5peWMvO+FueSqpOWBpuiFv+Whsua7kOWljuacgOIgPmM8PmMvPA2dgOKCgOOQgOiNv+WBpuiXvuWwruiMvO+gveSTieaavOSGuuS9iOeNuOS5peWMvO+LuOSAuOSskuWlu+Svj+Wdr+iEmueBpuiFv+WJnOaMvO+5gueAuOSFueSXvuWyuuSBpuiMvO+BpuiNh+mIvuWQreWWhOicgOIgPmM8PmMvPA2avO+0r+ibkOemuumEmueMlee8nOeAvOWnpOWZiOWeruWssOW0sOW8vOSLnOeBl+aAuOS5r+WYv+WNuOS2ueWMvO+QueSzn+mEmuezgOimgua6h+WPpeWMvO+oiuWsveiuvei/vemFvuWJreeMvO+zheWAvOWLuOSBkeaMvO+5suaKuOS/iea0veiEmuearuW6m+W6uOSGv+WwruiAneenhee5r+WMvO+JnOeAneexmueWu+QgPmM8PmMvPA2CgOOhiuW7u+SmreWZleaGuuSFi+a/ieaYv+i2l+akreaWu+SQj+ariOW0m+YgPmM8PmMvPA2CgOOngOaPmumEmueJnOaUuuWyrOaFg+aEmue2hOeqh+iGuuS0jeWYv+WOueSgh+WMvO+TveSruuiEmue5puW5puWFvuW5r+W3oOaAuOSSm+ezn+mrheWFo+iEu+ePg+WWu+QgPmM8PmMvPA2CgOOos+aTuOSEmuebjOeHv+ibiuWolOeNp+eJnOa7gOaFg+aooeiEmuegs+afseaMvO+LuuS2u+SAuOSVveS7u+SageW6ruigl+YgPmM8