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11/16科教科普类1、Australialeadstheworldinitsnumberofresidentpoisonousspidersaswellasthestrengthoftheirtoxicity(毒性).However,ofalmost9,800speciesmostareperfectlyharmlessandinteresting.Spiderdiversityisbroadandmanyfascinatingspeciesoccurherethatrangefromthelargetothetinyandhardlynoticed,andfromthedullestblacktothestrangelyshaped.Spiderscanberoughlyclassifiedaccordingtothestrategies(策略)theyuseforfeeding.Spiderswhichappearedearlierintheevolutionaryscalefeedbywaitinginacaveforfoodtocomealongbeforegrabbingit.Followingthemwerespiderswhichactivelywanderedlookingforfoodandwhichcaughtitbychasingitdown.Theevolutionofflyinginsectsmakesspidersevolvenewwaysofcatchingfoodwhichcouldn’tbechasedandsotheearliestairwebweaversarose.MostspidersfeedoninsectsandotherarthropodsbuttheWhistlingSpiderfeedsonfrogsandsmallbirds.TheGoldenOrbSpideralsofeedsonsmallbirds.Aspiderperiodicallysheds(蜕皮;脱落)itsskinsothatitcangrow.Immaturestagesarecalledmoults.Eachspecieshasaparticularnumberofmoultsthatitwillgothroughbeforereachingitsfinaladultstage.Usually,oncemalespidershavemated,theydieshortlyafter.But,evenindeath,Redbackmalesoftenserveapurpose.ThealreadypregnantRedbackfemalesalwayskilltheirloverand,inmostcases,alsoeatthem.Thisprovidesthemwithasmallreproductiveadvantage.Allowingspiderstotakeupplacesaroundhousescanbebeneficialinthattheycatchotherannoyinginsectssuchasmosquitoesandflies.Restassuredthatwhileyoumightseesomelargespiders,andperhapsevensomepoisonousones,agoodruleistolookandadmirebutdon'ttouchanyspideryoufind.Eventhosewithoutpoisoncouldstillhaveanastybite.1.Differentfamiliesofspidersareidentifiedthemselvesby______.A.theirphysicalcharacterB.theirwaysofgettingfoodC.thestrengthoftheirtoxicityD.theireffectontheenvironment2.Whatarethelatestspidersintheirevolutionprocess?12/16A.Spidersthatchasedowninsectsforfood.B.Spidersthatwaitfortheinsectstocomealong.C.Spidersthatcanweavewebstocatchflyinginsects.D.Spidersthatactivelygoouttolookforinsectsasfood.3.Ifaspiderstaysonthewallofyourhouse,you’dbetter______.A.killitB.feeditC.letitbeD.chaseitout4.Whatisthepassagemainlytalkingabout?A.Abriefintroductionofspiders.B.Theevolutionprocessofspiders.C.Livingharmoniouslywithspiders.D.Thelivingandfeeinghabitsofspiders.2、Manypeoplebelievethatyoulosetheabilitytolearnnewlanguagesasyougetolder.Languageexperts,however,willtellyouthatyou’renevertoooldtolearnanewlanguage.Asyougetolder,itcanbemoredifficulttolearnanewlanguage,though.Childrenandadultslearnnewlanguagesindifferentways.Forchildren,languageistheirlife.Theystudyforthousandsofhourseveryyear.Becausetheyneedtolearnlanguagetobecamepartoftheircommunities.Adults,ontheotherhand,arealreadypartofalanguagecommunity.Learninganewlanguagemeansbecomingpartofanotherlanguagecommunity,andadultsrarelygetthechancetopracticeasmuchasyoungchildrendo.Moreover.childrenleaninganewlanguageareexpectedtomakemistakes.ThisgivesthemfreedomwhenlearningtobedaringandconfidentAdults,however,oftenfeelpressuredtobeperfectwhenlearninganewlanguage.Thiscandiscouragemanypeopleandmakeitevenhardertolearnanewlanguage.Whenyoungchildrenlearnanewlanguage,theycometoseevariouslanguagesasa“normal”partofsociety.Thismindset(思维模式)helpsthemembracelearninganewlanguagewithoutfeelinglikethey'redoingsomethingunusualor“toohard”.13/16Soifyouwanttolearnanewlanguage,goforit!It’snevertoolatetolearnanewlanguage.Ifyou'reolder,itmaytakemorework,butitcanbedone.Ifyou'reayoungchild,though,nowisthetimetostepoutandlearnanewlanguage!1.By“Languageistheirlife”,theauthormeansthatchildren.A.can'tlivewithoutlanguageB.leadahappylifeeverydayC.practiceanewlanguagealotD.aretakengoodcareofadults2.Whatmaymakeithardfortheoldpeopletolearnanewlanguage!A.Theyareafraidofbeinglaughedat.B.Theyusuallyhavetoomanyinterests.C.Theythinkmakingmistakesisnatural.D.Theyalwaysmakeallkindsofmistakes.3.Whichofthefollowingshowsthedifferencebetweenchildrenandadultsinlearningnewlanguage?A.Thebehaviorstheyhave.B.Thelearningattitudes.C.Thefutureplanstheyhavemade.D.Thematerialstheyareusing.4.Accordingtotheauthor,anewlanguage.A.canneverbelearnedbytheoldpeopleB.canbegraspedbythepeopleeasilyC.canbeunderstoodonlybytheoldpeopleD.canlearnedbyboththeoldandtheyoung3、Kidsandteensareoftendismissiveofpraisefromtheirparents.Iamsurethatparentsouttherecanrelatetothis,asweallhavebeentoldatonetimeoranotherbyoneorseveralofourkids,“Stopit,Mom.’’oreven,“You’rejustsayingthatbecauseyouaremyparentsandyouhavetosaythat.Icanassureyou,though,thattheyarelistening.Theywillprobablynotthankyouforthispraiseuntiltheyareintheirtwenties,butdon'tletthatstopyoufrompraisingthemduring14/16theirchildhoodandteenyears.Justbecarefulhowyoupraisethem.Alittlepraisemaygoalongway—especiallyifitistherightkindofpraise.ItappearsthatthewaytogoistopraisetheireffortsaccordingtoastudybyBrummelman,ofUtrechtUniversityintheNetherlandsandcolleagues.Theseresearchersconcludedthatkidsshouldbepraisedprimarilyfortheirefforts,ratherthanfortheirpersonalcharacteristics,becauseiftheyarepraisedforeffort,thenapoorperformanceismorelikelytobeseenasaglitch(小故障),ratherthanavalidreflectionofwh