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1、高考试题分类汇编：阅读理解之科普知识类（1）Passage1（·全国卷I·C） AlongtheriverbanksoftheAmazonandtheOrinocotherelivesabirdthatswimsbeforeitcanfly,flieslikeafatchicken,eatsgreenleaves,hasthestomachofacowandhasclaws(爪)onitswingswhenyoung.Theybuildtheirhomesabout4.6mabovetheriver,animportantfe
2、ature(特征)forthesafetyoftheyoung.Itiscalledthehoatzin. Inappearance,thebirdsofbothsexeslookverymuchalikewithbrownonthebackandcreamandredontheunderside.Theheadissmall,withalargesetoffeathersonthetop,brightredeyes,andblueskin.Itsnearestrelativesarethecommonbirds,cucko
3、os.Itsmoststrikingfeature,though,isonlyfoundintheyoung. Babyhoatzinshaveaclawontheleadingedgeofeachwingandanotherattheendofeachwingtip.Usingthesefourclaws,togetherwiththebeak(喙),theycanclimbaboutinthebushes,lookingverymuchlikeprimitivebirdsmusthavedone.Whentheyoung
4、hoatzinshavelearnedtofly,theylosetheirclaws. DuringthedriermonthsbetweenDecemberandMarchhoatzinsflyabouttheforestingroupsofo30birds,butinApril,whentherainyseasonbegins,theycollecttogetherinsmallerlivingunitsoftwotosevenbirdsforproducingpurposes.63．Whatisthetextmain
5、lyabout? A．Hoatzinsindryandrainyseasons.B．Therelativesandenemiesofhoatzins. C．PrimitivebirdsandhoatzinsoftheAmazon.D．Theappearanceandlivinghabitsofhoatzins.64．Younghoatzinsaredifferentfromtheirparentsinthat_________ ． A．theylooklikeyoungcuckoos B．theyhaveclawsont
6、hewings C．theyeatalotlikeacowD．theyliveonriverbanks65．Whatcanweinferaboutprimitivebirdsfromthetext? A．Theyhadclawstohelpthemclimb.B．Theycouldflylongdistances. C．Theyhadfourwingslikehoatzins.D．Theyhadaheadwithlongfeathersonthetop.66．Whydohoatzinscollecttogetherins
7、mallergroupswhentherainyseasoncomes? A．Tofindmorefood.B．Toprotectthemselvesbetter.C．Tokeepthemselveswarm.D．Toproducetheiryoung.【答案解析】63．【解析】选D。主旨大意题。文章主要介绍了thehoatzin，它是生活在亚马逊河的麝雉。介绍了这种鸟的外表特征以及生活习性。故选D。64．【解析】选B。细节理解题。根据第三段的第一句Babyhoatzinshaveaclawontheleadingedgeofe
8、achwingandanotherattheendofeachwingtip.与此段的最后一句Whentheyounghoatzinshavelearnedtofly,theylosetheirclaws.可知幼鸟有爪子而老一些的鸟没
