首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
2018年3月28日，北方出现大范围沙尘暴天气，各地纷纷采取降尘等措施，减轻不利影响．下列措施不能达到降尘目的是（ ）
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
读北京市1960---2000年累计平均沙尘暴扬沙浮尘出现的季节变化示意图完成23-25题.23.图
①沙尘暴 ②扬沙 ③浮尘
①浮尘 ②扬沙 ③沙尘暴
①扬沙 ②浮尘 ③沙尘暴
①沙尘暴 ②浮尘 ③扬沙 24.该地沙尘暴扬沙浮尘天气居多的季节是（ ） A.春季B.夏季C.秋季D.冬季 25.近几年，沙尘暴、扬沙和浮尘天气愈加频繁，除自然因素外，人为因素主要是 （ ） ①过度垦殖 ②过度放牧 ③地表沙化 ④过度樵采 A.①②③④B.①②③C.①②④D.③④
.根据下列材料及漫画危险图11提供的信息完成下列各题2010年3月19日-21日我国经历了一场大范围
请为下面的新闻拟写标题不超过15字据新华社北京4月17日电记者姚润丰从16日夜间开始受蒙古气旋南部偏
我国是多自然灾害的国家读相关材料回答下列问题材料一2002年从3月18日傍晚起我国北方大部分地区经历
3月15日至17日3月20日至22日北京出现了两次沙尘天气沙尘暴项目组专家透露3月15日的沙尘天气过
3月下旬北京出现两次沙尘天气
北京两次沙尘天气人均“分得”10斤尘土
沙尘天气两袭北京
北京沙尘天气降尘量极大
看2015年3月13日天气预报图回答问题1描述沙尘暴分布范围分析沙尘暴的成因6分2结合地理知识谈谈如
阅读下列材料完成下列要求12分一我国沙尘暴的分布从时间上看沙尘天气有越来越频繁的趋势并且有季节的差异
几年来由于人口增长人类对自然的索取变本加厉导致生态环境严重恶化沙尘暴发生的频率增高据报道自2000年
.根据下列材料及漫画危险图11提供的信息完成下列各题2010年3月19日-21日我国经历了一场大范围
阅读图文材料回答下列问题10分材料一2011年5月1日中央气象报发表一篇题目为今年以来强度最大范围最
沙尘暴指强风把地面大量沙尘物质吹起并卷入空中使空气特别混浊水平能见度下降的天气现象是近年我国北方常见
12、1、2月
3、4、5月
6、7、8月
9、10、11月
东北网2011年5月12日讯经历了连续几天的阴雨天气哈尔滨市12日又迎来了沙尘天气从清晨开始市区便被
阅读材料回答问题如今北京成为全世界瞩目的焦点今年十月十七大的召开明年八月奥运会的举行令中华儿女人心振
读下列材料利用所学知识回答问题10分材料一2000年3月17日到5月7日沙尘暴使内蒙古呼和浩特赤峰阿
读下列材料回答问题2010年3月19日中央气象台发布了沙尘暴黄色预警我国北方经历了一场大范围的沙尘天
受蒙古气旋和冷空气影响2010年3月19日至20日我国出现今年以来最强的一次沙尘暴天气以下关于沙尘暴
沙尘漂浮在空气中是由于分子运动造成的
为了防止沙尘暴的发生，应保护草原植被
出现沙尘暴时，外出要戴好口罩，以免沙尘伤害呼吸道
沙尘掉落在叶片上会使植物的光合作用减弱
2010年3月19日中央气象台发布了沙尘暴黄色预警我国北方经历了一场大范围的沙尘天气此次沙尘过程影响
从2006年4月16日夜间开始受蒙古气旋南部偏西风的影响我国内蒙古地区中西部西北地区中东部和华北北部
气象灾害
海洋灾害
地质灾害
天文灾害 10.本次浮尘天气大都出现在夜间，原因是（ ） A.风力较大，沙尘容易吹起 B.夜间湿气大，沙尘容易被吸附在地面附近 C.建筑工地大都在夜间施工，导致浮尘扩散 D.夜间上升气流少，主要是下沉气流，使沙尘从高空降落
东北网2011年5月12日讯经历了连续几天的阴雨天气哈尔滨市12日又迎来了沙尘天气从清晨开始市区便被
2008年春节期间我国南方地区出现大范围的恶劣天气是
寒潮
大雪
台风
沙尘暴
热门试题
更多
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.
下列关于光现象的说法中正确的是
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
如图1所示是手机工具箱的一款工具你可以给它取个名字叫仪它用于测量填声音的特性的．图2所示仪器它是测量的仪表量程为．
6分Summeristimeforfamilyfunandthecreationoflifelongmemories.Donotmissoutontheopportunitytohaveanunforgettablevacationwhenbookingactivitieshotelsandmoreinthesefantasticcities. SanAntonioTX Whetheryouarelookingforahistoriclookintothisfantasticcityorseekingtospendthedaygettingsomesunatoneofthethemeparksintheareathere'ssomethingforeveryone.SanAntonioishometoSeaWorldSixFlagsFiestaTexastheSanAntonioAquarium水族馆andotherfunfamily﹣friendlyattractions.ForamorehistoriclookintothecitygoontheSanAntonioGrandTourtheAlamoTrolleyTourorbooktheSanAntonioExplorerPass. MackinacIslandMI ForanadventureMackinacIslandisthedestinationofchoice.SittingonLakeHuronMackinacIslandisinvitingwiththeGrandHotelLuncheonBuffetandSelf﹣GuidedTouroraMackinacIslandCarriageTour.IfyourattentionisonafamilyvacationadmissiontotheWingsofMackinacTropicalButterflyConservatoryorawateradventurewithGreatTurtleKayakToursisagreataddition. OrlandoFL Itwouldn'tbesummerwithoutatriptoOrlando.ForthosewhowanttovisitsomeofthehottestthemeparksofalltimeOrlandoishometoWaltDisneyWorldThemeParksSeaWorldOrlandoandUniversalOrlandoResort.IfyouwouldratherskiptheamusementparksandexperiencethemorenaturalsideofOrlandothereareoptionssuchasdeepseafishinginGulfofMexicoandOrlandoZiplineToursatFloridaEcoSafaris! 1WhatcanyouenjoyinSanAntonio? A.Playinthehottestthemeparksofalltime. B.Visitabutterflyconservatory. C.Godeepseafishinginagulf. D.Haveatasteofthecity'shistory. 2WhereshouldyougoifyouwanttoexplorenatureinOrlando? A.FloridaEcoSafaris. B.SeaWorldOrlando. C.WaltDisneyWorldThemeParks. D.WingsofMackinacTropicalButterflyConservatory. 3Whatdothethreeplaceshaveincommon? A.Theyarefamousforanadventure. B.Theyarefitforsummerholidays. C.Theylieinthesamestate. D.Theyallhaveathemepark.
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
如图所示在凸透镜的右焦点处有一平面镜垂直于主光轴放置．一束光AB经凸透镜和平面镜怎样传播画出光路图来．
如图是陈大爷眼睛看物体时的成像情况则他的眼睛类型及矫正需要选用的透镜分别是
下列四幅图对应的说法正确的是
探月宇航员把月球上的一块石头带回地球后如不考虑温度的影响则石头的
托盘天平调平衡后某同学在称量时发现指针偏向分度盘中央的左侧这时他应该
以下用品中在通常情况下属于导体的是
如图1所示电源电压保持不变小灯泡的额定电压为6V．闭合开关S后当滑片P从最右端滑到最左端的过程中小灯泡的I﹣U关系图象如图2所示． 则 1小灯泡的额定功率 2灯泡两端电压为1.5V时其阻值多大 3滑动变阻器的最大阻值．
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.
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.
如图为汽油机工作过程中某一冲程的示意图此冲程的名称及能量转化是
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
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
湘公网安备 43130202000226号