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时间:2019-11-10
《2019-2020年高考英语专题冲刺专题19书面表达之概要写作含解析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、2019-2020年高考英语专题冲刺专题19书面表达之概要写作含解析1.概要写作阅读下面短文,根据其内容写一篇60词左右的内容概要。Withglobalwarmingandmeltingice,itisn’teasybeingapolarbearanymore.Somestudieshavepredictedthatpolarbearscoulddieoutbytheendofthecentury.Thegoodnewsisnotallresearchersthinkthebearsareabsolutelydisappear
2、ing.ScientistsattheAmericanMuseumofNaturalHistory(AMNH)havepublishedanewpaperindicatingthatthingsmightnotbeasbadforpolarbearsassomescientistsexpect.Tounderstandthereasonfortheresearchers’cautiousoptimism,wemustfirstunderstandthefactorsthatarethreateningthepolarbear’
3、sexistence.Polarbearsconsumeadietofmainlyyoungseals.Inordertohunttheseseals,polarbearsneedtorestatthetopofseaice---thesameicethatisincreasinglymeltingformostoftheyearthankstoclimatechange.Inanother50years,expertsexpectthattheArcticwillbetoowarmforseaicetoformforhalf
4、oftheyear,leavingpolarbearswithoutareliablefoodsourceandinseriousdangerofstarvation.Asitturnsout,alternativefoodsourcesforthepolarbearsaren’tpletelyoutofthequestion.Foraslongasbiologistshavetailedaftertheanimals,they’veseenpolarbearseatinganimalsfoundonlandlikecarib
5、ou(驯鹿)andsnowgeese---aswellasthesnowgeese’seggs.Canpolarbearsactuallysurviveoffthesealternativefoodsourcesforlongperiodsoftime?Tofigurethisout,researcherscalculatedthenutrientsthatacaribouandsnowgeesedietwouldprovide.Theyfoundthatevenadultmalepolarbearswouldbeableto
6、obtainmorecaloriesthantheywouldburninhuntingthesemeals.Moreover,thefoodwouldprovidethefoodnecessarytoavoidstarvationduringthesummermonths.Unfortunately,notallpolarbearshavetendedtoseekfoodonland.Thatsaid,theresearchersexpectthatnecessitywouldpushmorepolarbearstohunt
7、onlandtoavoidstarvation.Theyalsoexpectthatthebearscouldlearnfromtheirfellowbearshowtohuntonlanduntilthepracticebeessecondnature.__________________________________________________________________________________________________________________________________________
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