西南大学附中高2025届高二上阶段性检测(一)z物理考试试卷

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西南大学附中高2025届高二上阶段性检测(一)z物理试卷答案

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30.WhatdoesSaladNthendathinkofhisname?A.Interesting.B.Meaningless.C.Important.D.Special.31.What'sthebesttitleforthetext?A.StoriesBehindSomeNamesB.SomeStrangeNamesinSouthernAfricaC.NamesinSouthernAfricaAreBothCreativeandMeaningfulD.One'sNameIsCloselyConnectedwithItsCountry'sHistory0Norainforestisexactlythesame-yetmostrainforestsarenowinthesmalllandarea23.26degreesnorthand23.26degreessouthoftheEquator(),betweentheTropicofCapricornandtheTropicofCancer.Youcanfindtropical(rainforestsinSouthAmericaandIndonesia.OtherrainforestsgrowwellfurtherfromtheEquator,inThailandandSriLanka.Despitecoveringarelativelysmallarea,rainforestshaveabigroletoplayinsupportingtheworld.Tropicalrainforestsarehometoarichvarietyofplants,food,birdsandanimals.CanyoubelievethatasinglebushintheamazonmayhavemorespeciesofantsthanthewholeofBritain?Fourhundredandeightyvarietiesoftreesmaybefoundinjustonehectareofrainforest.Rainforestsarethelungsoftheplanet-storinghugequantitiesofCOaandproducingalargeamountoftheworld'soxygen.Rainforestshavetheirownperfectsystemforensuringtheirownsurvival.Amazingly,thetreesgrowinsuchawaythattheirleavesandbranches,althoughclosetogether,neveractuallytouchthoseofanothertree.Scientiststhinkthisisadeliberate(waytopreventthespreadofanytreediseasesandmakelifemoredifficultforleaf-eatinginsectssuchascaterpillars.Tosurviveintheforest,animalsmustclimb,jumporfly.Thegroundflooroftheforestisnotalltangled(leavesandbushes,asinfilms,butisactuallyfairlyclear.Itiswhereleavesaredestroyedslowlyandturnedintofoodforthetreesandotherforestlife.Worryingly,rainforestsaroundtheworldaredisappearingatanalarmingrate,thankstodeforestation,riverpollutionandsoilerosion()aslandisbeinglostforagricultureandtreesarecutdownforwood.Afewthousandyearsago,tropicalrainforestscoveredasmuchas12percentofthelandsurfaceonEarth,buttodaythishasfallentolessthan7percent.Wecanonlyhopethattheworldgovernmentsworktogethertopreservetherainforests-beautifulandimportantforourexistence.32.What'sthemainideaofparagraph2?A.Theareaandhistoryofrainforests.B.Thefuturedevelopmentofrainforests.C.Rainforestsarethelungsoftheplanet.D.Rainforestsarehometoanimalsandplants.33.Howdorainforestsstoptreediseasesfromspreading?A.Theleavesoftwotreesnevertoucheachother.B.Therearefewleaf-eatinginsectsintherainforests.C.Theleavesandbranchesoftreesareclosetogether.D.Therichsoiloftherainforestshelpstreesgrow.34.Whatcanweknowaboutrainforests?A.Rainforestscoverarelativelylargearea.B.Rainforestsareunderproperprotectionnow.C.Rainforestsarethesameasdescribedinfilms.D.Rainforestscoverlessthan7percentofthelandsurfacenow.【高一英语第5页（共8页）】23117A

西南大学附中高2025届高二上阶段性检测(一)z物理第一部分

(2)若按正确的操作进行实验,由于系统误差,本实验所测电源电动势E跟真实值E。相比,EE0(填“<”“>”或“=”),所测电源内阻r跟真实值r0相比,r(填“<”“>”或“=”)。

西南大学附中高2025届高二上阶段性检测(一)z物理第二部分（待更新）

6.由曲春雨、范可新、张雨婷、武大靖、任子威组成的短道速滑混合接力队在比赛中的示意图如图所示,若将武大靖在弯道转弯的过程看成在水平冰面上的一段匀速圆周运动,转弯时冰刀嵌入冰内从而使冰刀受与冰面夹角为(蹬冰角)的支持力,不计一切摩擦,弯道半径为R,,重力加速度为,以下说法正确的是A.武大靖转弯时速度的大小为B.武大靖转弯时速度的大小为gRC.若武大靖增加转弯速度则需要增大澄冰角D.若武大靖增加转弯速度则需要减小蹬冰角