Thefollowingparagraphisincomplete.Choosethebestsentencetomakeitcomplete.选择合适的句子，完成段落。 Therearealotoftermsusedtodescribecomputers.Mostofthesewordsimplythesize,expecteduseorcapabilityofthecomputer.___________________________________.Themostfamiliartypeofmicroprocessoristhepersonalcomputer(PC).Itisdesignedforgeneralusebyasingleperson.Anotherpurposeforusingamicroprocessorisasaworkstation.Thecomputersusedforthispurposehaveamorepowerfulprocessor,additionalmemoryandenhancedcapabilitiesforperformingaspecialgroupoftask,suchas3DGraphicsorgamedevelopment.Acomputercanalsobeusedasaserver.Serversusuallyhavepowerfulprocessors,lotsofmemoryandlargeharddrives.Afourthone,amainframeistheheartofanetworkofcomputersorterminalswhichallowshundredsofpeopletoworkatthesametimeonthesamedata.

Thefollowingparagraphisincomplete.Choosethebestsentencetomakeitcomplete. EventhoughArizonaandRhodeIslandarebothstatesoftheU.S.,theyarestrikinglydifferentinmanyways.Forexample,thephysicalsizeofeachstateisdifferent.Arizonaislarge,havinganareaof114,000squaremiles,whereasRhodeIslandisonlyaboutatenththesize,havinganareaofonly1,214squaremiles.Anotherdifferenceisinthesizeofthepopulationofeachstate.Arizonahasaboutfourmillionpeoplelivinginit,butRhodeIslandhaslessthanonemillion.___________________________________.Forexample,Arizonaisaverydrystate,consistingoflargedesertareasthatdonotreceivemuchrainfalleveryyear.However,RhodeIslandislocatedinatemperatezoneandreceivesanaverageof44inchesofrainperyear.Inaddition,whileArizonaisalandlockedstateandthushasnoseashore,RhodeIslandliesontheAtlanticOceananddoeshaveasignificantcoastline.