说明文1(2017·黑龙江哈尔滨六中三模)NewgeneticanalysishasrevealedthatmanyAmazontreespeciesarelikelytosurvivehuman-madeclimatewarminginthecomingcentury，contrarytopreviousfindingsthattemperatureincreaseswouldcausethemtodieout.Astudy，1inthelatesteditionofEcologyandEvolution，revealsthe2ageofsomeAmazoniantreespecies—morethan8millionyears—and3showsthattheyhavesurvivedpreviousperiodsaswarmasmanyoftheglobalwarmingimaginedperiods4fortheyear2100.Theauthorswritethat，havingsurvivedwarmperiodsinthepast，thetreeswill5survivefuturewarming，providedtherearenoothermajorenvironmentalchanges.6extremedroughtsandforestfireswillimpactAmazoniaastemperatures7，thetreeswillstandthedirectimpactofhighertemperatures.Theauthors8thataswellasreducinggreenhousegasemissionstominimizetheriskofdroughtandfire，conservationpolicyshouldremain9onpreventingdeforestation(采伐森林)foragricultureandmining.Thestudydisagreeswithotherrecentresearcheswhichpredictedtreespecies’extinctions10relativelysmallincreasesinglobalaverageairtemperatures.Studyco-authorDrSimonLewis(UCLGeography)saidthe11weregoodnewsforAmazontreespecies，butwarnedthatdroughtandover-exploitationoftheforestremainedmajor12totheAmazon’sfuture.DrLewissaid,“Thepastcannotbecompareddirectlywiththefuture.Whiletreespeciesseemlikelyto13higherairtemperaturesthantoday，theAmazonforestisbeingtransformedforagricultureand14，andwhatremainsisbeingdegraded(使恶化)bylogging(伐木)，andincreasinglysplitupbyfieldsandroads.“Specieswillnotmoveasfreelyintoday’sAmazonastheydidinpreviouswarmperiods，whentherewasnohuman15.Similarly，today’sclimatechangeisextremelyfast，makingcomparisonswithslowerchangesinthepast16.”“Withaclearer17oftherelativeriskstotheAmazonforest，we18thatdirecthumanimpacts—suchasforestclearancesforagricultureormining—shouldremainakeypointofconservationpolicy.Wealsoneedmoreaggressive19toreducegreenhousegasemissionsinordertomakeminimumtheriskofdroughtandfireimpactsand20thefutureofmostAmazontreespecies.”语篇解读本文主要讲了一项最新的研究，研究表明气候变暖不会使亚马逊古代树种灭绝。1．A.advertisedB．describedC．publishedD．presented答案C解析advertise做广告；describe描述；publish公布；present呈现。此处表示：《生物与进化》的最新版公布的一项研究。故选C。2．A.frighteningB．surprisingC．excitingD．interesting答案B解析frightening令人害怕的；surprising令人惊讶的；exciting令人兴奋的；interesting有趣的。句意为：这项研究揭示了亚马逊树种惊人的年龄。故选B。3．A.stillB．neverthelessC．howeverD．therefore答案D解析句意为：这些古代树种有着超800多万年的树龄，因此表明了它可以幸存于和先前所有时期一样温暖的全球气候变暖的时期，预测为2100年。therefore因此。故选D。4．A.assessB．confirmC．forecastD．promise答案C解析assess评定；confirm确认；forecast预测；promise允许。由上题解析可知选C。5．A.particularlyB．probablyC．merelyD．possibly答案B解析句意为：作者写道，亚马逊的树种曾在高温气候中生存下来，所以将来也有可能在气温升高的气候中存活。故选B。6．A.SinceB．AlthoughC．WhenD．If答案B解析句意为：虽然随着温度的升高，严重的干旱及森林火灾将会影响亚马逊流域，但这些树木将会忍受更高温度的直接影响。故选B。7．A.riseB．changeC．dropD．end答案A解析rise升高；change变化；drop掉落；end结束。由本句末的“highertemperatures”可知应是温度升高。故选A。8．A.considerB．decideC．guaranteeD．recommend答案D解析consider考虑；decide决定；guarantee保证；recommend推荐，建议。后面是作者的建议，故选D。...
