AppliCAtions put ComputErs to prACtiCAl BusinEss (67) , But BElow thE (68) it’s thE hEArt oF An opErAting systEm-thE kErnEl-thAt proviDEs thE tEChniCAl wizArDry to jugglE multiplE progrAm, ConnECt to nEtworks AnD storE (69) .
A、trADitionAl kErnEl proviDEs All thE FunCtions For AppliCAtions. thE kErnEl (70) mEmory, i/0 DEviCEs AnD pArCEls out proCEssor timE.
thE kErnEl Also supports sECurity AnD FAult (71) , whiCh is thE ABility to rECovEr AutomAtiCAlly whEn pArts oF thE systEm FAil.
A、EArth
B．Bottom
C．tABlE
D．surFACE