题目内容：
听录音,回答题Manycollegestudentstodayownpersonalcomputersthatcostanywherefrom$1,000toperhaps$5,000ormore．(26),itisnotuncommonforthemtopurehase(27)
costinganotherseveralhundreddollars．Twentyyearsago,computerswere(28),buttheywereverylargeandextremelyexpensive．Few,ifany,(29)purchasedcomputersforhomeuse．Overtheyears,thepriceofthe"guts"ofacomputeritsmemoryhasdeclinedtolessthanathousandthofthepriceperunitofmemorythatprevailedtwentyyeatsago．Thisisthemainreasonwhycomputerscostsomuchlesstodaythantheyusedto．Moreover,(30)improvementshavemadeitpossibleto(31)memorycircuitrythatissmallenoughtofitintotheportablepersonalcomputersthatmanyofusownanduse．(32),asthepriceofcomputationhasdeclinedtheaverageconsumerandbusinesshavespentmoreonpurchasingcomputers．(33),improvedagriculturaltechnology,hybrid seeds,(34)animalbreeding,andsoonhavevastlyincreasedtheamountofoutputatypicalfarmercanproduce．Thepricesofgoodssuchasmeatsandgrainshavefallensharplyrelativetothepricesofmostothergoodsandservices．Asagricultural,priceshave"fallen,manyhouseholdshavedecreasedtheirtotalexpensesonfood．Eventhoughthe(35)ofaproductpurchasedgenerallyincreaseswhenitspricefalls,totalexpensesonitmaydecline．
第(26)题__________
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