ch7-4 起步稍慢又如何（1 / 2）
PmMvPA2BvO+vgeavruiGpuiem+W7iOWLq+eFueSNuOSOkOWvgeavruigvOSpj+easOWcp+WonOW2hOefq+eMvO+6uuSLueS3teiameahneeameakreaCpuWMvO+MgOi2hOcgPmM8PmMvPA2CgOOEmueShumFuOaavOSNuOSvmOa0pOW/q+eKuOSll+awiOWNuOSMvO+6uuSLueShneeameakreaCpuWMvO+vgeaHreaNieaGuuS0pOW6h+WShuW9g+mzmOmqpOWwiOWJreeMvO+cpOWKjeW0m+aJuOSwiOWcveSlt+WcpOWshue4uOWPu+exsOWuv+SgseaMvO+ZgOW2l+aEmuecveSlt+WMkOWAuOS6uuSkuOSWpOW9m+WonOWNieWlu+SMvO+QreWrjOecpOWquOSvmOauv+SgseYgPmM8PmMvPA2CgOOFg+aLuuS2u+SAuOSIsOigveSft+izg+afvO+XkOW6qeeJnOaonOWwjuegveSMvO+uv+SgseaavO+RgOOpj+ezueWBjOadv+SasOWcp+WQgOMgPmM8PmMvPA2CgOOuv+SgseaZu+evgeavruiGuuSgvOS/vuSAneeljuaMvO+ZhuePpOWwteiBgOmOkOWHv+iQpOmIjeWonOWMvO+XrueTieaquOSJnOaPu+eyt+WMh+mDv+WWu+SMvO+kreaCpuW9meidr+ggPmM8PmMvPA2CgOO7veiruuiAuOSLuuSgl+aMvO+RsOa4uOaauOSgl+avmOaNu+Spj+easOWcp+WMgOiMvO+IjeWLuOSonOWtuOSGm+mLqOeMoeiEmueZhuePpOWll+aKu+QgPmM8PmMvPA2CgOOavOS6nOaJnOahsuasnOa5oOaMvO+6uuSApum2heWMvO+inemAuOSEmuexiOevj+WAnOapj+easOWcp+WBp+iLnOe9g+iNieaMvO+Wu+SJnOaqj+WfueQgPmM8PmMvPA2NgOOCgOOGuuSSo+aAnOalk+Wpj+easOWEmueRiOa2hOecnuaMvO+xiOevj+WvmOafnOelk+Wpj+easOWMgOOavO+Tgemtr+iqh+iAqOiqh+iMvO+RrOe/geeynOminemMvO+ZhuePpOWEmueKuOSKuuWonOW6uuggPmM8PmMvPA2CgOOXtOazouakruW0teawiOWbv+intOe2teiMvO+KuuWLuOSGjOWGjOWMvO+pj+easOWcp+WEmuejoea6qeeGuuSXvuUgPmM8PmMvPA2CgOOpj+easOWcp+WHv+i+lOaOuuSIu+eNieaqleeAuOSgvOeguuepj+easOWcp+WAneeTiuaIj+WZhuePpOWMvO+ZhuePpOWHv+iNuOSUr+aUsOabiuWEmuepj+easOWcp+WMvO+MgOi2hOcgPmM8PmMvPA2CgOOcveSoiuWtu+enu+eZhuePpOWirea7mOmzg+aMvO+NieW4g+ionOWhjOaLieaolOepj+easOWcp+WNgOOBvO+mleWGuuS9peWBgOO9peWBgOOGuuS9peWMgOMgPmM8PmMvPA2CgOOQreWinem5gueAuOSKj+W+oemzg+avmOaYv+ipj+easOWcp+WMvO+Xj+WruuSNhuW/veSzjeWMvO+XtOazouaqnOaasOWxt+Wqh+i3teizg+aMvO+MgOi2hOeMvO+7kOWljuaZhuePpOWOuOSGuuSog+axiOeEmuefnOeWu+SMvO+EmuefnOe0r+ggPmM8PmMvPA2CgOOJp+ifhOaEmue7kOWyuuSZhuePpOWOuOSXj+WruuSIvuWSgOWNj+WMvO+XiuaNj+WhsuafueSpj+easOWcp+UgPmM8PmMvPA2CgOOlheWMgOiameiBtuiWsOWMiOiMvO+/vemdtOiAvOWskuafgOmrv+W2ueWMvO+jk+eHlOWEmuepj+easOWcp+WKuOS7kOWhrOaNhuWZhuePpOWMvO+Vr+atr+iNgOOCgOOJm+Wtu+enu+emgOKmgOKxsOWRiOaIueSjgumMvO+KleWShumhsuaYv+iMgOMgPmM8PmMvPA2CgOO0r+iEmueDguiluOScveSFleaMvO+RrOeAneeNv+Wpj+easOWcp+WNgOOCgOOhsuaYv+iMgOMgPmM8PmMvPA2NgOOfvO+XkOWGuuSShumFuOaQreWLuOSZv+iMgOOavO+Tgemjj+WAvOWAneeljuaNieaMvO+jk+eHlOWEmuepj+easOWcp+WPveS7kOWruuivv+SvmOaqj+WMvO+tr+iNuOSZhuePpOUgPmM8PmMvPA2NgOOBvO+ikeWShumFuOaoheWMruWhsuaYv+iRiOafvO+RiOaEvOWJjeaonOWxsOWpl+aAuOSIueSOgOagveSMgOOMvO+RrOeAuOSIpeWgl+apj+easOWcp+UgPmM8PmMvPA2CgOOPveSNuOSPl+ifueSPl+iPhOaRrOeVuuW8nOeMvO+Bl+akuOSQreWruuipj+easOWcp+WonOWRkuaLieaMj+WEmueZhuePpOWNgOOBvO+KleWJruWpl+aMvO+lk+Wpj+easOWMgOMgPmM8PmMvPA2CgOO8nOeKuOS5r+WZhuePpOWOuOS/vuSjgumOieWEmue8nOeBneeMvO+ShumFuOa2l+a/oempj+easOWcp+WMvO+7kOWAuOSLuOS9kOiDv+WMjuaonOWMvO+5vuiHlOWwiOWJi+aMvO+PveSJjea6uuSLueSumueDsOijgumrouiLieaMvO+tuOS6qeeKjeWonOW0jeWMvO+ljOaGuuSljOaLieaolOepj+easOWcp+UgPmM8PmMvPA2NgOOmgOKmgOKJp+ihneezg+aYv+iRiOaMvO+GuuS5l+mriOWMgOMgPmM8PmMvPA2CgOOUsOa5kOWeuuW4hOiEmuext+Wqh+idnOaonOW6uuSJnOaXvuWJp+i0m+eAuOS/vuSWu+SMvO+0l+mShumKjeWmouaKjeWonOWNu+Spj+easOWcp+WMvO+pl+aAuOSll+aMv+cgPmM8PmMvPA2CgOOAkeWZlOmNuOSfueSVjeWKuuWau+alk+Wpj+easOWEmueWu+SOuOSNhuW3teipl+aMvO+cveSlt+WolOeNuOSWu+Sll+aOmOajreaNj+WMvO+ll+aOmOawiOWZleebiuWTveSJnOaAieaKiua9peWqj+WMvO+Wu+Soo+eYiuaNhuWXrueTieaNuOSfueSppOWKu+SMvO+mi+ibvuiEmuepj+easOWcp+WTgemln+eWu+SMvO+6uuSEmueRhOioiuWruuiKjeWLuOSolOeTgemln+eqj+WvmOaNuOSfueSZhuePpOUgPmM8PmMvPA2CgOOqleeAuOSXj+WruuSMleeWuOStuOSmoualheWbv+iMvO+rouiJo+aKuOSWm+ezg+aqj+WMvO+0h+i0heWEmueVjeWKuuWau+aZhuePpOWft+iGuuShsuaVuuW7veWWu+SMvO+mgOWylue6uOSgm+WfueSMvO+GuuSvtOeEmuefnOevmOapj+easOWcp+UgPmM8PmMvPA2NgOOCgOObmOWvgeaRvOS9peW9peWRiOapruixsOWppOWKu+SMvO+GuuSppOWAuOSGuuSvtOe9g+mppOWKu+SRiOaMgOOavO+0r+iEmueUsOa9peWhsuaMvO+0l+mwheiEmueZhuePpOWziOaGuuSziOaMvO+HjOafo+m6h+W4vOSpj+easOWcp+WMvO+rsei5iueEmuetuOStr+idr+iZhuePpOW6h+WskOUgPmM8PmMvPA2CgOOGuuSWu+SSgOWDgOieruWuoeeYoumul+mquOSZv+ipj+easOWcp+WlneaLnOeMvO+Fg+aepeeEmuersei5iue6h+WynOmZhuePpOWNgOOmgOKmgOKbmOWquOSZv+iMgOMgPmM8PmMvPA2NgOOfvO+ahOibr+aLieabr+aRiOa5r+WavOSNuOSOkOWLueS0l+m/iOaem+WBr+idv+SileagveSMgOOMvO+GuuSRrOefueSpj+easOWcp+WMvO+AqOi7l+kgPmM8PmMvPA2NgOOCgOOmk+WJp+ihnee0l+m/iOa7juWgveSxiualu+Svj+WRiOadr+iEmueGuuSvtOelk+Wpj+easOWMgOOavO+0r+iMvO+RrOeGuuSRrOe7veiZhuePpOUgPmM8PmMvPA2CgOOgrOaIk+WquOSGuuSTieaMh+mAgOaZhuePpOWonOWOgeWdvuSpj+easOWcp+WMvO+KuOSRj+WZsuaonOWQneWUsOa0sOaruuiAuOSAneemuOWMvO+Vr+aMruWXtOazouaOuuSIu+eNieaZhuePpOWOuOSpj+easOWcp+WMvO+0uOSlneappOWAuOSEmuewluaMvO+7juWHv+iPu+eyt+WfueSppOWAuOSMvO+6uuSiruWwteiBgOmTmOa5ruWNuOS9peUgPmM8