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KOH溶液能使无色酚酞试液变成红色．某化学兴趣小组想探究KOH溶液使无色酚酞试液变成红色的原因． 【提出问题】KOH溶液中的什么成分使无色酚酞试液变红？ 【猜 想】猜想1：KOH溶液中的H2O使...
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某溶液的pH为13该溶液能使无色酚酞试液变成色加水稀释后溶液的pH将填变大变小或不变其原因是
某兴趣小组利用氨水能使无色的酚酞试液变红的原因设计如下实验以分子在不断运动着请回答实验中的有关问题1
查阅资料得知氢氧化钠溶液中含有H.2O.Na+OH﹣.某化学兴趣小组同学欲探究氢氧化钠溶液中哪一种粒
对实验现象的观察和分析有助于获得化学知识并学会科学探究的方法下列对实验现象的分析合理的是
向某无色溶液中滴入酚酞试液，呈红色，证明该溶液是碱溶液
某白色固体与熟石灰研磨，产生的气体可使酚酞溶液变成红色，证明该固体是铵盐
向某无色溶液中滴入氯化钡溶液，产生白色沉淀，证明该溶液是硫酸溶液
把燃着的木条伸入某无色气体的集气瓶中，火焰熄灭，该气体不一定是二氧化碳气体
KOH溶液中含有H.2O.K.+OH﹣能使无色酚酞试液变成红色.某化学兴趣小组想探究KOH溶液使无色
某化学兴趣小组做以下实验探究分子的运动请回答实验中的有关问题.【实验探究一】向盛有蒸馏水的烧杯中滴入
某无色溶液能使无色酚酞试液变红则该溶液能使紫色石蕊试液变
紫色
红色
蓝色
无色
某无色溶液能使石蕊试液变蓝该溶液能使酚酞试液变
蓝色
红色
紫色
无色
某实验兴趣小组的同学测得葡萄汁的pH为4则往葡萄汁中滴加石蕊试液后溶液变成
红色
蓝色
仍为紫色
变为无色
查阅资料得知氢氧化钠溶液中含有H2ONa+OH﹣.某化学兴趣小组同学欲探究氢氧化钠溶液中哪一种粒子能
能使无色酚酞试液变红的溶液可使紫色石蕊试液
变成红色
变成无色
变成蓝色
不变色
某无色溶液能使石蕊试液变蓝该溶液能使酚酞试液变
蓝色
红色
紫色
无色
在三个试管中分别盛有少量A.B和C无色溶液A溶液能使无色酚酞试液变红色B溶液不能使紫色石蕊试液变色C
某兴趣小组利用氨水能使无色的酚酞试液变红的原因设计如下实验以分子在不断运动着请回答实验中的有关问题1
能使无色酚酞试液变红的溶液可使紫色石蕊试液
变成红色
变成无色
变成蓝色
不变色
能使无色酚酞试液变红的溶液能使紫色石蕊试液变为
红色
蓝色
无色
不变色
KOH溶液中含有H2OK+OH﹣能使无色酚酞试液变成红色.某化学兴趣小组想探究KOH溶液使无色酚酞试
某溶液能使无色酚酞试液变红则它能使紫色石蕊试液变
紫色
红色
蓝色
无色
下列有关酸碱指示剂的说法正确的是
稀硫酸能使紫色石蕊试液显蓝色，能使无色酚酞试液显红色
向某无色溶液中滴加紫色石蕊试液，即可判断该溶液的酸碱性
向某无色溶液中滴加无色酚酞试液，即可判断该溶液的酸碱性
紫色石蕊试液能使盐酸变红色
能使无色酚酞试液变红的溶液可使紫色石蕊试液
变成红色
变成无色
变成蓝色
不变色
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10分Babieshavethecharmtomeltanybody'sheartinstantlynooneescapesthetwinklingeyesortheinnocentsmile.Justtheirpresencewillcheeryouupmakeyouforgetyourworriesandtemptyoutoindulgeintotheirworld.1ThoughIdon'thaveanyanswertothequestionIwonderastowhatmakestheiraurasodesirable.AndIthinkthereissomethingwecanlearnfromtheyoungones. ForgiveandForget Babiescanlaughandgigglealldaybecausetheydon'tkeephatredagainstanyone.2 Doyouthinkthey'veconstructedanevilplanagainstyoubecauseyourefusedthemcandylasttime?Probablynotlifemovedonandsodidthey.Sowhydoweholdontoourpastandrefusetoletgooftheemotionalbaggage?Doesitdousanygoodexceptpreventusfromlaughingtothefullest? 3 Endlessquestionsofyoungkidscansometimesbeenoughtodraintheadultmind.Theyarealwaysbusywonderinghowthingsworkorwhythingsarethewaytheyareleavingnoroomforboredom.Theircuriositygivesthemanexponentiallearningcurvetheypickupnewthingsquicklyanddonotrefusetochange. UnconditionalLove 4Theydon'tjudgeyoubeforetheycomerunningintoyourkneesandtheydon'twalkawayifyoudon'tgivethemthesameinreturn.Theyhavenoexpectationsfromyouandsimplydowhattheirheartdesires.Ifyouwantahugthey'llgiveyouahugifyouwanttwothey'llgiveyoutwo.Sohowdoestheadultworldbecomesomaterialisticthatwedecidewhatwegivebasedonwhatwethinkwemightreceive? Livinglifetothefullestisnotadifficulttaskyoujustneedtohavetherightattitudeandanopenmind.5 A.Keepsmileeveryday B.Never﹣endingCuriosity C.Whatcanwedotofreefromtheseworries? D.Whydoweadoretheyoungonessomuch? E.Sodon'tenvythepeacefullifeofababystartlivingityourself! F.Kidshaveahugandakissforanyoneandeveryonewhowantsone. G.Theirheartispureandtheirmindemptytolaughoutloudandenjoythemoment.
8分Areyouafraidofsharks?Whataboutsnakesorspiders?PutthosefearsasidebecauseintheU.S.you'refarmorelikelytobekilledorinjuredbyadeerskippingacrosstheroad. Deercausemorethan200humansdeathseachyearplussome29000injuriesallbecauseof1.2millioncollisionsbetweenvehiclesanddeer.MostincidentsoccurintheeasternU.S.wheredeerprosperwithoutnaturalpredatorslikewolvesandmountainlions. That'stheregionintheU.S.wheredeer﹣vehiclecollisionsaresuchaproblemandwhereitseemslikeaneffectivelargecarnivorereintroductioncouldmakeareallybigdifference.sayswildlifebiologistLauraPrughfromUniversityofWashington.Shethinksitwouldhelptoreintroducepredatorslikemountainlionsalsoknownascougarspumasorpantherstopartsoftheirhistoricrangefromwhichthey'vebeendrivenout. TheresearcherssaythatbringingthepredatorsbacktotheeasternU.S.wouldmean22percentfewercollisionsbetweencarsanddeeroverthreedecades.Eachyearwouldseefivefewerhumandeaths680fewerinjuriesandasavingsofsome550million.SophieL.Gilbertthinkstherearegreatsocioeconomicbenefitsoflargepredatorrestorationthroughreducedwildlife﹣vehiclecollisionsandshesayssaysCougarshaveshownthattheycancoexistinshortdistancewithpeoplewithveryfewconflictsinalotofareasoutwest. Stillsomefolksmightbeunderstandablynervousaboutthiskindofplan.Afterallreintroducingpredatorsdoesn'tcomewithoutriskstopetsandtolivestockandveryoccasionallytopeople. OurfearoflargepredatorsissonaturalandintensethatIdon'tthinkit'spossibletojustcompletelyclearitwithstatistics…WhatIhopeisthatknowingthatthereactuallycanbesomemeasurablebenefitsmightmakepeoplealittlemoresupportiveandmaybebalancethatfearalittlebit.saysLaura. Indeedthestatisticsshowthatcougarswouldpreventfivetimesasmanyhumandeathsfromdeer﹣relatedaccidentsastheywouldcausebyattacks.Butit'llbeatoughsellthepresswillcovercougarattacksbutastatisticallypreventeddeathdoesnotmakethenews.NeverthelessIfpeopleinthewestcanputupwithhavingmountainlionsaroundIwouldhopethatNewYorkerswouldbeupforthechallengeaswell. 1WhatisclosestinmeaningtotheunderlinedwordcarnivoreinParagraph3? A.Acat﹣likeanimal. B.Adangerousanimal. C.Ameat﹣eatinganimal. D.Agrass﹣eatinganimal. 2Whydopeoplewanttobringbackmountainlions? A.Tominimizetheaccidentscausedbydeer. B.Tomaintainbiodiversityandecologicalbalance. C.Totakeupthechallengefrompeopleinthewest. D.Toreducepeople'sfearofthisdangerouscreature. 3Whyisithardtopersuadepeopletoacceptthismeasure? A.Becausetherisksoutweighthebenefits. B.Becausemountainslionslikeeatingpeople. C.Becausethebenefitsarenotaseye﹣catchingasitsrisks. D.Becausemountainlionstendtogettooclosetopeople. 4Whatisthebesttitleforthetext? A.PumaaToughSell B.ANewStudyonPuma C.DeerCauseHugeLifeLosses D.DeerorPumasaHardChoice
30分ThatholidaymorningIdidn'thavetoattendschool.UsuallyonholidaysMother1metosleepin.AndIwouldcertainlytakefulladvantageofit.Onthisparticularmorning2Ifeltlikegettingupearly. Istoodbymywindowoverlookingthe3havingnothingbettertodo.ButasitturnedoutIwassoontolearnaboutsomething4inlife. AsIwatchedseveralpeoplegobygetintotheircarsanddriveoffI5anoldmanonabicyclewithabucketonits6andabasketofragsandbottlesonitsback﹣carriage.He7fromonecartoanotherwashingandcleaningthem.Fromthewateronthegrounditseemedthathehadalready8washingandcleaningaboutadozenormorecars.Hemusthavebeguntoworkquiteearlyinthemorning. Severalthoughts9mymindasIwatchedhimwork.Hewasn'twell﹣dressed.Hehadonapairofshortsandan10T﹣shirt.Thebicycleherodewasnotbyanymeansthekindmodern11wouldwanttobeseenridingon.Butheseemed12withlife.Therehewasworkinghardathissmallbusiness13atpassers﹣byandstoppingtochatnowandthen14elderlymenandwomenontheirwaytothemarketnearby. Therewasanoticeabletouchof15inthewayheseemedtobedoingthings﹣16thewindscreen挡风玻璃thenstandingbacktoadmireitscrubbing擦净thewheelsand17standingbacktoseewhattheylookedlikeafterthescrub. Itwasa18tolearn.Ifelt.Atnoageneedonehavetobegfora19ifonehasgoodhealthandiswillingtoworkhard.ForawhileIfelt20ofmyself.YoungasIam﹣justsixteenandtherewasthisoldmanwhomusthavebeenusefullyengagedperhapsbeforethesunappearedabovethehorizon. 1A.forces B.allows C.causes D.forbids 2A.otherwise B.therefore C.however D.besides 3A.parkinglot B.busstop C.school D.market 4A.interesting B.surprising C.awful D.useful 5A.noticed B.recognized C.called D.assisted 6A.back B.handle C.wheel D.seat 7A.searched B.left C.moved D.wandered 8A.stopped B.started C.intended D.finished 9A.crossed B.slipped C.disturbed D.inspired 10A.attractive B.shiny C.simple D.expensive 11A.repairmen B.businessmen C.drivers D.cyclists 12A.busy B.content C.careful D.bored 13A.waving B.looking C.laughing D.pointing 14A.about B.for C.with D.like 15A.worry B.respect C.sympathy D.pride 16A.cleaning B.fixing C.replacing D.covering 17A.still B.yet C.again D.soon 18A.lesson B.subject C.skill D.fact 19A.business B.living C.success D.right 20A.tired B.doubtful C.fearful D.ashamed
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如图所示L1L2两个白炽灯泡．做实验时闭合开关有时会出现灯L1发光灯L2不发光的现象．则下列说法正确的是
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10分Stressisamajorprobleminthemodernworld.1Itiscommonamongofficeworkers.Managingitisnecessaryforpeopleinordertocreateawork﹣lifebalance.Sohowcanyougoaboutremovingstressthroughtheancientartofgardening? Surroundyourselfwithnature.Treesbirdsandscentoftheoutdoorsaregreatwaystohelprelax.2Soinordertoremovestressthroughgardeningyouneedtogrowlotsofplants. Makeitcomfortable.3Afterallwhat'sthepointofmakingitbeautifulifyoucan'tsitorwatchyourflowersgrowafterwards?Agood﹣qualitysetofgardenfurnitureistheonlywaytomakesureyourgardenisascomfortableaspossibleinordertoremoveyourstress. 4Toreallyappreciategardenspaceforwhatitisyouneedtoleaveallofthestressesofmodernlifebehindwhichmeanskeepingyourphoneindoors.Yesitmaybehardatfirst.Butafterawhileitwillbegintofeelnormalandevengood.Sometimesnotknowingwhatishappeningintheoutsideworldistheonlywaytoenjoythetranquility宁静ofyourgarden. Invitefamilyandfriends.Doyouwanttogetthebestwaytotrulyremovestressthroughyourgardeningefforts?Shareitwithyourfamilyandfriends.Agoodbarbecueaswemoveintothewarmermonthsisthebestportofcall.5Afterawhileyourgardenspaceshouldbecomearelaxationandstress﹣freezone. A.Avoidusingtechnology. B.Inparticularitcanbeakillerifleftuntreated. C.Toattractwildlifesetfeedingtablesinyourgarden. D.Thepeacefulnessofnatureactsasanaturalwaytoreducestress. E.Justmakesureyoudon'tinviteanyonelikelytocauseanargument. F.Itgivesyougoodfoodgoodcompanyandagoodchancetoremovestress. G.Furnitureisnecessaryforyoutomakethemostofyourcomfortablegarden.
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10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Nowadaysmanypeopledriveinsteadoftakingabusorwalkingtowork.Itcausesmoretrafficaccidents.Asthestudentwhatcanwedotoguaranteeoursafe?Firstofallthetrafficrulesmustbestrictobeyed.Whenwecrossstreetswaituntilthetrafficlightturngreen.Nextdon'tforgetwalkonthepavement.FinallyIthinkitverydangerouslytowearheadphoneswhilewalkingorcycling.Sincewecan'tpayenoughattentiononthetrafficaroundussoaccidentsmayhappen.Takinggoodcareofourselvesanddon'tletourparentsworryaboutthem.
8分Bothhoneybeesandantsaresocialinsectsthatliveingroupscalledcolonies.Theysurvivebymeansoftheircollectiveintelligence.Theirdecision﹣makingpowerisdistributedthroughoutthegroupthatisnooneantorbeemakesdecisionsforthegroup.Insteadtheyworktogether.AsDeborahM.GordonabiologistofStanfordUniversitysaysAntsaren'tsmart.Antcoloniesare.Thesameistrueforbeecolonies.Althoughbeesandantsarequitedifferentphysicallytheyhavealotincommonintermsoftheirbehavior.Specificallyhoneybeesandantshavesimilarroleswithinthecolonybothhavecommunicationsystemsandbothhavethecapacityoflearning. Antscommunicatebyusingchemicalscalledpheromoneswhichcanalertotherstodangerortoafoodsource.Forexamplewhenworkerantsfindapromisingsourcetheylettherestofcolonyknowhowtofinditbyleavingatrailofpheromonesonthewaybacktothecolony.Theotherantspickupthemessageusingtheirsenseofsmell.Beesontheotherhandusemovementtocommunicatewitheachother.Workerbeessendmessagetoeachotherbymeansofadance.Differentspeedsandmovementssenddifferentmessages.Forexamplewhenworkerbeescalledscoutsgoouttofindanewhoeforthecolonytheyreturnanddoadancefortheotherworkerbeesthatindicatesthelocationofthenewhomeandhowsuitableitis.Thefasterthescoutsdancethebetterthenewlocationis. Honeybeesandantsarebothcapableoflearning.OneChinesestudyfoundthatbeescanbetrainedtolearnandrememberaroutetoafoodsource.Theresearchersalsofoundthatbeescanbetaughttorecognizehiddenobjectsandusetheconceptsofsamenessanddifferencetoaccomplishcertaintasks.Antstakethisonestepfurther.RecentAmericaresearchhasshownthatantsnotonlyhavetheabilitytolearnbutalsocanteachtheirforagingskillstootheryoungerants.Theyobservedthatolderantsaccompanyyoungantsinsearchoffoodandteachthemtherouteandhowtoavoidobstacles. Aswecanseethesocialbehaviorofhoneybeesandantsisquitesimilar.Bothcoordinatecomplexactionsandaccomplishcrucialsurvivaltasksbycooperatingingroupsconsistingofmanyindividuals.Unintelligentastheymaybeasindividualsasgroupstheyoftenshowamazingbrillianceastheygoabouttheireverydayactivities. 1Whatdoantsandbeeshaveincommon? A.Theymakeuseofcollectiveintelligence. B.Theyliveinsimilar﹣sizedcolonies. C.Theyhavesmallleadershipgroupsthatmakealldecisions. D.Theyusethesamemethodtocommunicatewitheachother. 2Whatdocsthespeedofabee'sdanceindicate? A.Thedistancetoaneighboringcolony. B.Thequalityofanewcolonylocation. C.Thediscoveryofanewfoodsource. D.Thedirectiontoapotentialfoodsource. 3Inparagraph3howdocstheauthordemonstratetheideathatHoneybeesandantsarebothcapableoflearning? A.Byusingstatistics. B.Byexplainingreason. C.Bypresentingstudyfindings. D.Bystatingopinions. 4WhatdoestheunderlinedpartforagingskillsrefertointhethirdParagraph? A.Theskillsofcommunicating. B.Theskillsofsackingfood. C.Theskillsofleaning. D.Theskillsoffindinganewhome.
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小明同学利用如图所示的装置做小孔成像实验．他将饮料罐的前端开了一个很小的三角形小孔后端开口并蒙上半透明的纸．他把小孔对着烛焰则在半透明纸上看到的是
如图学校各教室都配置了饮水机身高1.6m的小芳将放置在地面上标有“16.6L”的一桶水安装到饮水机上小芳所做的功最接近的是
30分Theroomintheworkhousewheretheboyswerefedwasalargestonehall.Atoneendthemasterinhiscook'suniformandtwowomenservedthefood.This1abowlofthinsoupthreetimesadaywithapieceofbreadonSundays.Theboysate2andwerealwayshungry.Thebowlsneverneeded3.Theboyspolishedthemwiththeirspoonsuntilthey4.Afterthreemonthsofthisslowstarvationoneoftheboystoldtheothersthatsohungrywashe5onenighthemighteatthe6sleepingnexttohim.Hehadawild7eyeandtheotherboys8him.Afteralong9theydecidedthatoneofthemshouldaskformorefoodaftersupperthateveningandOliverwas10. Theeveningarrivedthesoupwasservedandthebowlswere11againinafewseconds.Oliverwentuptothemasterwithhisbowlinhishand.Hefeltvery12butalso13withhunger. PleasesirIwantsomemore. Themasterwasafathealthymanbutheturnedverypale.Helookedatthelittleboyinfrontofhimwith14.Nobodyelsespoke. What?heaskedatlastina15voice. PleasesirrepliedOliverIwantsomemore. Themaster16himwiththeservingspoonthenseizedOliver'sarmsand17forthebeadle执事.Thebeadlecamequicklyheardtheterriblenewsandimmediatelyrantotelltheboard. Heaskedforme?Mr.Limbkinsthefattestboardmemberaskedin18.Isthisreallytrue? 19Oliverwasledawaytobelockedupandan20offivepoundswasofferedtoanybodywhowouldtakehimawayandusehimforwork. AdaptedfromOliverTwist雾都孤儿 1A.belongedto B.turnedto C.accountedfor D.consistedof 2A.nothing B.cleaning C.buying D.something 3A.washing B.cleaning C.buying D.changing 4A.finished B.starved C.shone D.slept 5A.that B.until C.when D.before 6A.boy B.master C.bowls D.spoons 7A.big B.bad C.angry D.hungry 8A.hated B.feared C.believed D.trusted 9A.quarrel B.bargain C.argument D.discussion 10A.elected B.chosen C.determined D.recognized 11A.full B.empty C.broken D.available 12A.shy B.brave C.worried D.frightened 13A.pleased B.hopeful C.desperate D.exhausted 14A.amusement B.amazement C.intension D.appreciation 15A.calm B.clear C.faint D.cautious 16A.hit B.treated C.greeted D.warned 17A.begged B.sent C.shouted D.asked 18A.horror B.sadness C.curiosity D.frustration 19A.Besides B.Therefore C.However D.Eventually 20A.award B.praise C.reward D.punishiment
8分Mid﹣afternoononaparticularlybusyTuesdayItookleaveofmydeskatworkandwalkedintoalocalStarbucksonlytofindaspacewhereneithermyclients客户normychildrenwouldaskmetodosomething. InsideIranintoKateaco﹣workerofmine.Thetopicofparenthoodcameup.Icomplainedabouthowpackedmyschedulewas.FromtheminuteIwokeuptotheminuteIfellasleepIwasconstantlyindemandandalwayshadsomeoneknockingatthedoor.ButabitofsadnessseemedtocomeoverKate'sface. Wellmydaughter'sinSanFranciscoandshedoesn'tseemtoneedmeatallthesedays.Katesaid.ItwasinthatmomentthatIrealizedalthoughImightoftenfeelinhighdemandtherewillcomeadaywhenI'llactuallymissthatsamestressInowcomplainabout. Andasourconversationcontinueditturnedtoourchildren'syoungeryearswithKatesmilingproudlythinkingofthelittleboyandgirlsheraisedwhoarenowamanandawoman.ButInoticedhersmilewasmarkedwithregret.Sheexplainedthatsheoftenwonderedaboutwhatshecouldhavedonedifferentlywhenherchildrenwereintheirearlieryears. ThisgotmethinkingIsregretanunfortunatefootnote注脚toparenthood?WiththatinmindIaskedsixolderparentsonequestionWhatisyourbiggestregretfromyourearlydaysasaparent? Itturnedoutthatallofthemthoughttheycouldhavedoneitbetter.Buteachofthemalsohasastronghealthyrelationshipwiththeirkids.Whateverregretstheirparentsmighthavehadabouttheirupbringingonethingisclear﹣itdidn'taffecttheminameaningfulway. ThebottomlineisweallfeellikewecouldbedoingthisparentingthingbetterAndquiteclearlyyearslaterwe'restillgoingtolookbackandwishwetriedthingsdifferently.Butthepastcan'tbechangedandneithershouldit. 1Whatcanbeinferredfromthefirstthreeparagraphs? A.Katehadthesameproblemastheauthor's. B.Thetwopeoplehadarrangedtomeetinthecoffeeshop. C.Katewenttothecoffeeshopsonoonecouldfindherthere. D.Theauthorwenttothecoffeeshoptoescapefromthepressuresaroundhim. 2WhydidKatefeelsadandregretful? A.Becausesheandherdaughterhadafight. B.Becauseshehadn'tpaidenoughattentiontoherkids. C.Becauseshewasdisappointedwithherkids'performance. D.Becauseshethoughtthatshecouldhavedonebetterinraisingherkids. 3Whatdidtheauthorfindwhenhespoketosixolderparents? A.Someoftheparentshaveabadrelationshipwiththeirkids. B.Hewasmovedbytheloveoftheseparentsfortheirchildren. C.Theseparentsimprovedtheirbehavioraftertheirkidsgrewup. D.Noneoftheparentswerecompletelysatisfiedwiththewaytheyraisedtheirkids. 4Whatshouldparentsdoaccordingtothelastparagraph? A.Givemorelovetotheirkids. B.Letyourchildrengrowupwithfreedom. C.Cherishthepresenttimeanddoone'sbesttobeaparent. D.Neverstoplearninghowtobeagoodparentfromothers.
如图所示小球从距离地面一定高度的O点沿x轴竖直落下不计空气阻力图象表示小球某种形式的能量E随下落高度x的变化情况．E可能表示小球的
10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. NowadaysSenior3studentsaregenerallyfacedwithalotofpressurethatisrathercommon.Toreduceitthefollowingsuggestionmayhelp.Firstofallknowexactlywhatleadtoyourpressureandthenyoucantakemeasurestodealwithit.Secondlysetupagoalthatisnottoohighintheotherwordsdon'tputtoomanypressureonyourself.Thirdlyfindingawaytorelaxyourselfoccasionally.Forexampleyoucanlistenmusicgoswimmingorjustsimplegowalking.Eventuallymakefriendswithothersforexampleyourclassmatesyourteachersandourparents.Theywillunderstandyouandcometoyourhelpthoughyouarereallyintrouble.Inawordnevergetyourselfstuckinthepressureforimpossibleisnothing.
在“探究电流与电阻的关系”实验中 1请用笔画线代替导线按图1将图2中完成电路的连接 2利用图1所示电路实验得到图3所示的电流随电阻变化的图象．图中阴影部分表示的物理量是计算其数值是 3在每次换上不同的阻值的电阻R0都要调节滑动变阻器是使R0两端电压选填“增大”“不变”或“减小”．图1的电源电压9V某次接入一个阻值标注值模糊的电阻R0时正确操作后读出电流表示数此时滑动变阻器连入电路的阻值估计为2Ω则这次实验所接入的电阻R0为Ω．
8分Thealarmsounds.Studentsswingtheirbackpackovertheirshoulderboardtheschoolbusmaketheirwaytotheirhomeroomandthebellrings﹣schoolisback.ButformorehomesinAmericaschoollooksmorelikestudentswakingupmakingtheirwaytothediningroomorhomeofficesettinguplaptopsandlearninginthecomfortofhome. Virtual虚拟的schoolingdescribedasapublicschoolthatoffersonlyinstructioninwhichstudentsandteachersareseparatedbytimeand/orplaceandinteractionoccursviacomputersand/ortelecommunications电信technologieshasincreasedoverthepastdecade.AccordingtotheNationalEducationPolicyCenterenrollments注册人数invirtualschoolswas278518betweenthe2015﹣2016schoolyearandthe2016﹣2017schoolyearincreasedby17000. ForArizonaVirtualAcademyafull﹣timeonlinepublicK﹣12schooltheyuseK12Inc.curriculums.K12Inc.servesstudentsinall50statesandmorethan100countrieswithdigitallearningplatformsandtechnologyprovidingonlineeducation.Wealwaysareimprovingourplatformsandthetechnologythatweusetomakesurethatwe'rekeepingupwiththechangingtrendsnotonlywitheducationbutalsowithtechnologyDr.KellyVanSandesaid.Anotherpieceofnewtechnologythey'verolledoutisanewappwhereparentscanfindvirtualschoolsavailableintheirarea. CarrieFaulknerchosetoenrolltwoofherchildreninArizonaVirtualAcademy.Shesaysthey'vedoneschoolingonlineinChicagoinCaliforniaatrestaurantsandonhercousin'sfloorinKansas.Itdoesn'tmatterwhetherhehersonisonthecouchinhisbedoratthekitchentablehecandoschoolingwhereverhewantstoFaulknersaid.IwishtheyhaditformebackwhenIwasinschool.Thatwouldhavebeenawesome. 1Whydoestheauthorcomparethetwokindsofschoolinginthefirstparagraph? A.Toattackrealschooling. B.Togiveanexampleofvirtualschooling. C.Tointroducethetopicvirtualschooling. D.Todescribevividlystudents'goingtoschool. 2Howmanystudentsattendedvirtualschoolsduringthe2016﹣2017schoolyear? A.295518 B.17000. C.278518. D.147759. 3WhatcanweinferaboutArizonaVirtualAcademy? A.Theyprovidebothonlineandofflineeducation. B.They'reintendedforstudentsintheUnitedStates. C.Theirnewappletspeoplefindschoolsworldwide. D.Theirplatformsandtechnologyareveryadvanced. 4WhatisCarrieFaulkner'sattitudetovirtualschooling? A.Ambiguous. B.Cautious C.Supportive. D.Disapproving.
15分Thesilentkiller﹣airpollutioncausessevenmillionpremature过早的1deathayearnotjustin2developcountriesbutalsoinUKandtheUSAaswell.InChinapeoplearewellawareofthehealthproblemsitbrings. Icheckeveryparteveryday.IfithasheavyairpollutionIwillpreparemasksformyfamily.Idislike3whentheairisbad.BecausebadairmakesitdifficultformetobreatheandIthinkitdoesinfluencemy4performatwork.Anewresearchinchinahasalsofoundalinkbetweenairqualityandlevelsofintelligence.Inthestudy25000peoplelivingacrossChina5testinlanguageandmathskillslastyear.Theyfoundtheresultsofthose6livedinmorepollutedareaswere7negativeimpactedespeciallyinlanguages.Itaddstoagrowingbodyofevidencethatairpollutionhasaneffectnotjustonthelungsandheart8onthebrain. Thisresearchshowsthatthelongerweareexposedtoairpollutionthe9manyproblemswe'restoringupforlaterlife.CampaignershopethisstudywillpersuadetheBritishgovernment10thinkhardbeforeitpublishesitscleanairstrategynextyear.
8分Whenmyfathermarriedmymotherin1943hegavemymothera1937crowncoinandtoldhertokeepitinthebackofherpurseandnottospendit.Thiswouldmeanthatshealwaysfeltthatshewasprotectedandwouldalwayshavemoneyifshereallyneededit. WhenIwasmarriedin1970myhusbandwhohadheardthisstoryobtaineda1937crowncoinformeandIhavealwayskeptitinmywalletandIhavealwayshadenoughformyneeds. Afriendrecentlyfellonhardtimespartlythroughexternal外部的circumstancesandpartlythroughpoorplanning.FriendsandIhaveloanedhermoneypaidherbillsgivenherfoodandeventriedtoteachherbudgettechniquesbutnoneofthemhasbeenasolution.Shehasjustslippeddeeperanddeeperintofinancialtroubleanddepression. LastweekshelookedpaleandunwellverydepressedandhopelessverysadforafriendtoseeandIthenthoughtabouthowthecrowncoinaphysicalreminderofanother'scareandlovehadprotectedmesoIwenttothebankfora﹩100dollar﹣bill. Itoldmyfriendthestoryandaskedhertokeepthe﹩100inthebackofherwallet.Itturnedoutthatshedidn'thaveawalletsosheputthemoneyinalittlepencilcasewhereshekepthercoins.Sheimmediatelyfeltbetter﹣Ifeelrichandthankyouforbeingagoodfriendshesaidandwewerebothabitteary. IwenthomeandrememberedalittlewalletIhadthatI'dneverusedandthoughtI'llgivethattomyfriend.Iopeneditandinsidefound﹩100. 1Whatdidthe1937crowncoinfromtheauthor'sfathermeantohermother? A.Hisconcernforher. B.Hispityandprotectionforher. C.Hiscareandloveforher. D.Hisprideandrespectforher. 2Wheredidtheauthor'sfriendkeepthe﹩100dollar﹣bill? A.Inthebackofherwallet. B.Inalittlepencilcase. C.Inthepocketofherraincoat. D.Inthelayerofhersuitcase. 3Whatcanbeinferredfromthelastparagraph? A.Theauthorbecamerichallofasudden. B.Theauthor'sfriendwouldreceiveawalletasagift. C.Theauthor'sfriendwasnottouchedbyherstory. D.Theauthorfeltuncomfortablewhenreceivingthebill. 4Whatcanbethebesttitleforthetext? A.Acrowncoin B.Thehelptoafriend C.Ahardlife D.Agiftfrommyfather
在下列现象中可能引起保险丝熔断的是 ①插座中的两根线头相碰②开关中的两根线头相碰 ③电路中增加了大功率用电器④户外输电线绝缘皮损坏．
25分假定你是李华你的英国朋友David写邮件告知你他打算购买红楼梦ADreaminRedMansions英文版但不知道纸质版本和有声版本哪个更适合.请你给他提出建议要点如下 1.你的建议 2.你的理由至少两条 注意 1.词数100左右 2.可以适当增加细节以使行文连贯. 参考词汇有声读物audiobook
如图所示小刚透过装水的圆柱形杯子观察铅笔．手中铅笔的笔尖原来朝左的可他看到的像却是笔尖朝右则他看到的是铅笔的选填“实”或“虚”像这是因为杯子和水起到了凸透镜的作用选填“近”或“远”视眼镜用的就是这种透镜．若将铅笔继续选填“靠近”或“远离”杯子他所看到的像将会变成笔尖朝左．
登山是人们喜爱的一种健身方式登山时为避免后仰上身应稍向前倾同时背囊中较重的物品最好放在如图所示中的选填“A”或“B”位置处．图中背着背囊的人提起左脚时可看作以右脚跟o点为支点的一个杠杆请作出B点重物受到的重力和力臂．
如图所示的四个实例中其设计是考虑到要减小压强的是
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