文档介绍：听力教程4unit1听力原文-主编:,大学教育的费用会很贵。。。,有些品种的利率将从7月1日起上调。5. ,很多学生将背着沉重的债务从大学毕业。prehensionPart1Dialogue-SocialGroupingInterviewer:'?NikeDown:,many,manyanimalsareverysolitary*,orwhenthey',butaverysignificantgroupofmammalsandinsects,likeantsandtermites*,beesandwasps,areverysocialandtheygrouptogetherbecauseinagroupit''reinagroup,youcanfindmalesmoreeasilyifyou'reinagroup,:Youmentionedlionsandothercarnivores*?NikeDown:',lionsand,toalesserextent,cheetahs**,,perhapsadozenfemales,:Andhowabouttheapes?NikeDown:Ah,well,nowyou'—someapes—liveinvery,*,forexample,bigapesthatliveinIndonesiaandMalaysia—they'reverysolitaryandoneadultmaymeetanotheradultonlyonceeverytwoorthreeyears,whenamaleandafemalemate,andthen,,fouryears,fiveyearseven,learningfr