dbnoacn
数学几何问题
1.设圆半径为r OP^2=OA^2+AP^2 (BP+OB)^2=AP^2+OA^2 (5+r)^2=10^2+r^2 r=7.5 2.连接OC,设BC交AO与N点 因为PA\/\/BC,所以∠BNO=∠PAO=90° 因为OB=BC 所以△BON≌△CON 所以BN=CN 所以△ABN≌△ACN 所以AC=AB=1\/2PO=1\/2×(5+7,5)=6.25 over ...
Chrome 发现了 32 个恶意浏览器插件!总安装量高达 7500 万次,Avast检 ...
Avast, a renowned cybersecurity company headquartered in the Czech Republic, offers various security solutions and products aimed at protecting individuals and enterprises from numerous online threats and malware.Google recently removed 32 malicious browser extensions from the Chrome Web Store. ...
仙剑奇侠传5j激活码
ATDUB-BNOJW-SVVBJ-JRIULOWWWS-OMCDU-FKUYF-FCJSZOKOOC-IFQIB-YLLYG-KNHFJCKKLK-RGBBM-CELTB-TWMALZLXSF-YAIHK-WUDLX-TRBSZHPPHO-DGICK-KDOUP-INABIELRLC-EXSKO-YREHS-YTQZZOASTH-AVGHN-NMNJC-LQVSZOVDQS-HKYSR-TSBHB-RFPKRWSGAQ-STBSP-NIKKW-YDCSZSVZKE-FSQMV-KAGQV-ZZWGYOCJBH-VMAHL-...
