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1、Onanelementaryschoolplayground,阅读理解答案 Onanelementaryschoolplayground,hundredsofchildrenrunandjump,smilingandlaughingastheyplay.Watchingseaotters（海獭）playingintheirownenvironmentislikewatchingchildrenatplay.Seaotters,whicharepresentlyontheendangeredspecieslist,areexperiencinga
2、nincreaseinpopulation. GroupsofseaottersliveontheshoresoftheNorthPacificOcean.Theyareseldomfoundfarfromlandbutalmostspendtheirentirelivesatsea.Theotterhasbeenknowntodiveasdeepas180feetandstayunderwateraslongasminutes.Eachdaytheseaottereatsasmuchasone-fifthofitsbodyweightinfi
3、shorshellfish. Notonlyareseaottersplayful,theyarealsoamazinglyresourceful.Theirfavoritefood,abalone （鲍鱼）,isprotectedbyathickshellthatseaottersareunabletobreakwiththeirteeth.Seaottersusestonesfromtheoceanfloorandbreaktheabaloneopenontheirbellies（肚子）astheymoveslowlyacrossthes
4、urfaceof thewaterontheirbacks,abehaviorthatmakesthemoneofonlyafewanimalsonEarth,includinghumanbeings,tousetools！Theirintelligenceisalsodisplayedwhilesleeping.Inordernottomoveintodangerouswaters,seaottersactuallycoverthemselveswithplantsonthesea,whichkeeptheminplacebeforefa
5、llingasleep. Becauseseaottershaveaspecialmeansofkeepinginsulated（隔热的）,theycankeeptheirbodyheatintheircoldenvironment.Theyhaveunbelievablyfinefur（毛）thattrapstinybubbles,andthatkeepsthemcomfortablewhenwarmedbybodyheat.However,theirfurlosesthisinsulatingqualityifitbecomesdirty.
6、 Seaottershavefaceddangersfromhuntersinthepastandfromoilspillsmorerecently.Fortunately,duetoa1911agreementandtorescueandhabitatprotectionefforts,theseaotterpopulationhasnearlyrecovered. 31．Theauthormentionedplayfulchildrenatthebeginninginorderto_______. A．showseaottersaref
7、untowatch B．de scribeascenewherechildrenplaywithseaotters C．comparechildrenwithseaotters D．discusstheproblemfacedbyseaotters 32．Paragraph2mainlytalksaboutseaotters’_______. A．appearanceB．livinghabitsC．economicvalueD．livingenvironment. 33．Theunderlinedword“resourceful
8、”inParagraph3isclosestinmeaningto_______. A．beautifulB．energeticC．c
