2019届高考英语阅读理解：科普类说明书文--有解析汇报

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1、实用标准文档科教科普类1、   Australialeadstheworldinitsnumberofresidentpoisonousspidersaswellasthestrengthoftheirtoxicity(毒性).However,ofalmost9,800speciesmostareperfectlyharmlessandinteresting.   Spiderdiversityisbroadandmanyfascinatingspeciesoccurherethatrangefromthelargetothetinyandhardlynoticed,andfromthedu

2、llestblacktothestrangelyshaped.   Spiderscanberoughlyclassifiedaccordingtothestrategies(策略)theyuseforfeeding.Spiderswhichappearedearlierintheevolutionaryscalefeedbywaitinginacaveforfoodtocomealongbeforegrabbingit.Followingthemwerespiderswhichactivelywanderedlookingforfoodandwhichcaughtitbychasingit

3、down.Theevolutionofflyinginsectsmakesspidersevolvenewwaysofcatchingfoodwhichcouldn’tbechasedandsotheearliestairwebweaversarose.   MostspidersfeedoninsectsandotherarthropodsbuttheWhistlingSpiderfeedsonfrogsandsmallbirds.TheGoldenOrbSpideralsofeedsonsmallbirds.   Aspiderperiodicallysheds(蜕皮;脱落)itsski

4、nsothatitcangrow.Immaturestagesarecalledmoults.Eachspecieshasaparticularnumberofmoultsthatitwillgothroughbeforereachingitsfinaladultstage.   Usually,oncemalespidershavemated,theydieshortlyafter.But,evenindeath,Redbackmalesoftenserveapurpose.ThealreadypregnantRedbackfemalesalwayskilltheirloverand,in

5、mostcases,alsoeatthem.Thisprovidesthemwithasmallreproductiveadvantage.   Allowingspiderstotakeupplacesaroundhousescanbebeneficialinthattheycatchotherannoyinginsectssuchasmosquitoesandflies.   Restassuredthatwhileyoumightseesomelargespiders,andperhapsevensomepoisonousones,agoodruleistolookandadmireb

6、utdon'ttouchanyspideryoufind.Eventhosewithoutpoisoncouldstillhaveanastybite.1.Differentfamiliesofspidersareidentifiedthemselvesby ______.A.theirphysicalcharacterB.theirwaysofgettingfoodC.thestrengthoftheirtoxicityD.theireffectontheenvironment2.Whatarethelatestspidersintheirevolutionprocess?文案大全实用标准

7、文档A.Spidersthatchasedowninsectsforfood.B.Spidersthatwaitfortheinsectstocomealong.C.Spidersthatcanweavewebstocatchflyinginsects.D.Spidersthatactivelygoouttolookforinsectsasfood.3.Ifaspiderstaysonthewallofyou