操作系统具有两个基本功能,即：通过__，提高计算机系统效率；向用户提供__，提高用户的工作效率。
控制与管理计算机软、硬件资源、人机界面
暂无解析
Ioftenthoughtofmychildhood,____Ilivedonafarm.
Nowadaysitismoreconvenientandeasierforpeopletotraveltoothercountries.Doyouthinkthepositiveeffectsexceedthenegativeeffects?
世界原油出产可定满足不了全球需求。
Inasecond-handbookshop,Billycameacrossabookwhichhethoughtwascertainlya____edition.
Whilethefreehealthcliniccosts$1milliontooperate,itis$500000lessthanthecoststhecompanywouldrealizeifemployeesweretreatedelsewhere.
