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公共英语考试阅读公共英语考试阅读精品文章一AmericanBlackBears美国黑熊Americanblackbearsappearinavarietyofcolorsdespitetheirname.Intheeasternpartoftheirrange,mostofthesebearshaveshinyblackfur,butinthewesttheygrowbrown,red,orevenyellowcoats.Tothenorth,theblackbearisactuallygrayorwhiteincolor.Eveninthesamelitter,bothbrownandblackfurredbearsmaybeborn.BlackbearsarethesmallestofallAmericanbears,ranginginlengthfromfivetosixfeet,weighingfromthreehundredtofivehundredpounds.Theireyesandearsaresmallandtheireyesightandhearingarenotasgoodastheirsenseofsmell.Likeallbears,theblackbearistimid,clumsy,andrarelydangerous,butifattacked,mostcanclimbtreesandcovergroundatgreatspeeds.Whenangryorfrightened,itisaformidableenemy.Blackbearsfeedonleaves,herbs,roots,fruit,berries,insects,fish,andevenlargeranimals.Oneofthemostinterestingcharacte