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“珍爱生命，拒绝毒品”尤其是青少年更应向毒品说“不”，如吸食“病毒[甲基苯丙胺C10H15N”]成瘾性和毒副作用很强，会严重破坏人的生理和免疫机能．下列有关说法不正确的是（ ） A．甲基苯丙胺是...
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青少年应珍爱生命远离毒品．海洛因是一种常见毒品其元素质量分数分别为C68.29%H6.23%O21
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全民禁毒教育实施意见规定各级各类学校要根据学生的不同特点分阶段切实做 到计划教学材料课时师资四到位使
开展禁毒教育
开设禁毒课程
开展禁毒宣传
云南省一些中小学校开展了毒品预防教育活动如参观戒毒所和禁毒教育图片展览观看禁毒教育影视和召开主题班会
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珍爱生命拒绝毒品尤其青少年更应该对毒品说不如吸食__易成瘾毒副作用强会严重破坏人的生理和免疫功能．冰
青少年要积极宣传毒品的危害自觉地与______________等不法行为作斗争珍爱生命终身远离毒品_
珍爱生命拒绝毒品尤其青少年更应该对毒品说不如吸食__易成瘾毒副作用强会严重破坏人的生理和免疫功能__
甲基苯丙胺由碳、氢、氮三种元素组成
甲基苯丙胺含 26 个原子
甲基苯丙胺的相对分子质量为149g
甲基苯丙胺中各元素的质量比为10:15:1
我们一定要珍爱生命拒绝毒品
不让毒品进校园活动帮助学生树立远离毒品健康成长的观念巩固 的成果
“珍爱生命,远离毒品”
“绿色生活,健康无毒”
“家喻户晓,深入人心”
“学生不__,校园无毒品”
共用注射器__是传播艾滋病的重要途径因此要拒绝毒品珍爱生命
珍爱生命拒绝毒品尤其是青少年更应向毒品说不如吸食病毒[甲基苯丙胺C10H15N]成瘾性和毒副作用很
甲基苯丙胺是有机物
甲基苯丙胺的相对分子质量为149
每个甲基苯丙胺分子含有26个原子
甲基苯丙胺中C．H．N的质量比为10：15：1
青少年应珍爱生命远离毒品．海洛因是一种常见毒品其元素质量分数分别为C68.29%H6.23%O21.
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青少年朋友一定要珍爱生命提高警惕自觉抵制毒品..判断对错
珍爱生命拒绝毒品尤其青少年更应该对毒品说不如吸食__易成瘾毒副作用强会严重破坏人的生理和免疫功能．
青少年应珍爱生命远离毒品．海洛因是一种常见毒品其元素质量分数分别为C68.29%H6.23%O21
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珍爱生命拒绝毒品尤其是青少年更应该对毒品说不如吸食__易成瘾毒副作用强会严重破坏人的生理和免疫功能冰
甲基苯丙胺中各元素的质量比为10：15：1
甲基苯丙胺含26个原子
甲基苯丙胺的相对分子质量为149g
甲基苯丙胺由碳、氢、氮三种元素组成
我们拒绝毒品的口号是珍爱生命
远离毒品
知晓毒品
远离娱乐场所
抵制__
今年联合国禁毒宣传的主题是
珍惜生命健康抉择
珍爱生命拒绝毒品
拒绝毒品健康抉择
远离毒品珍爱生命
珍爱生命拒绝毒品尤其是青少年更应该对毒品说不如吸食__易成瘾毒副作用强会严重破坏人的生理和免疫功能
甲基苯丙胺由碳．氢．氮三种元素组成
甲基苯丙胺含26个原子
甲基苯丙胺的相对分子质量为149g
甲基苯丙胺中各元素的质量比为10：15：1
为贯彻全民禁毒教育实施意见广东省教育厅强调在广大青少年中进行珍爱生命拒绝毒品的教育之所以要在广大青少
意识对物质有促进作用
意识具有能动作用
意识能够正确反映客观事物
正确的意识能够反作用于客观事物
许多青少年__是从抽烟开始的吸烟为毒贩提供可以利用的机会他们往往把毒品掺进烟丝中骗青少年吸食所以
青少年拒绝毒品，首先要从拒绝吸烟开始
拒绝毒品可以从抽烟开始
拒绝毒品可以从拒绝麻醉药开始
首先要__，然后戒毒
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用化学知识解决下列问题． 1家庭厨房就是一个化学小世界“锅碗瓢盆”和“柴米油盐”中包含着许多化学知识下列厨房用品的主要材料中属于有机合成材料的是． A．紫砂锅B．陶瓷碗C．不锈钢水瓢D．塑料盆 2现有烧杯试管量筒铁架台酒精灯集气瓶玻璃片水槽带导管的橡皮塞等仪器不能用来完成下列填序号实验． ①制取氢气②粗盐提纯③配制l00gl0%的NaCl溶液 3向硝酸亚铁和硝酸银的混合溶液中加入一定量的锌粉和铜粉充分反应后过滤滤液呈蓝色则滤液中一定含有的金属离子有填离子符号． 4一些可溶性的重金属盐如含Cu2+Ba2+Ag+与蛋白质作用会使蛋白质凝固变性从而丧失其生理功能危急生命．检査胃肠疾病时病人若误服BaCO3会中毒此时可饮用Na2SO4溶液解毒请用化学方程式表示出解毒的原理．
Universityeducatorslargelythinkhighlyofthewondersofteachingthroughtechnology.Howevercritics41whethersomethingislostwhenprofessorsandlecturesrelytooheavilyonelectronicmediaorwhen42withstudentstakesplaceremotely﹣﹣incyberspace网格空间43therealspaceoftheclassroom. HansUlrichGumbrechttheProfessorofLiteratureatStanfordUniversilyisonesuchcritic.Ithinkthisenthusiasticandsometimeschildishand44pushingtowardthemoretechnologythebetterthemorewebsitesthebetterteacherisverydangerous﹣isindeed45heindicates. HoweverGumbrechtwarnsthattherearefewstudieseithersupportingorrejectingthehypothesis假设thattraditionalwaysofteachingare46toteachingviatheInternet.Hesaysthathecouldpointonlytohisfeelingtliatrealclassroompresenceshouldbe47andemphasizestheneedforeducatorstoexaminecriticallywheretechnology48ausefulteachingfunctionandwhereitdoesnot. YetGumbrechtallowsthatforcoursesinwhichknowledgetransmissionistheonlypurposeelectronicmediaprobablycandothejobwellenough.Indeedasaresultofthe20thcentury'sknowledge49andtheincreasingcostsofhighereducationusingtechnologyforthetransmissionofinformationisprobably50headmits.Howeverknowledgetransmissionshouldnotbethemostimportantfunctionoftheuniversityhemaintains51thatuniversitiesshouldbeplaceswherepeoplefaceopenquestionsplacesforintellectualcomplexityandriskfulthinking. Wearenotaboutfindingortransmittingsolutionswearenotaboutrecipeswearenotaboutmakingintellectuallifeeasy.Challengingcomplexityiswhat52yourmind.Itissomethinglikeintellectualgymnaistics.Andthisiswhatmakesyouasuitablememberofthesociety.Moreoverdiscussionsinthephysicalpresenceofotherscanleadtotheintellectual53.There'saan54changeandyoudon'tknowhowithappens.Discussionsinthephysicalpresencehavethecapacityofbeingthe催化別forsuchintellectualbreakthroughs.Thepossibilityofin﹣classroomteaching﹣﹣﹣oflettingsomethinghappenwhichcannothappenifyouteachbythetransmissionof'infonnationisits55 41.A.deny Bquestion Cobject Dcomment 42.A.combination Bcooperation Cpresentation Dinteraction 43.A.morethan Blessthan Cratherthan Dotherthan 44.A.blind Btough Cpassive Drough 45.A.impersonal Bdisastrous Cillogical Dimmoral 46.A.superior Brelated Copposed Dequal 47.A.approved Breformed Cmaintained Dremoved 48.A.serves Bconveys Cdelivers Didentifies 49.A.evaluation Bevolution Cemission Dexplosion 50.A.affordable Bflexible Cinevitable Dpredictable 51.A.confirming Burging Ccomplaining Dnoting 52.A.expands Blimits Ccomforts Dawakes 53.A.decline Binnovation Cconsequence Dformation 54.A.qualitative Birregular Cprotective Dminor 55.A.criticism Bstrength Cdemonstration Dinvolvement
如图所示并联电路中R0不变Rx增大时电路的总电阻R会选填“增大”“减小”或“不变”． 现有如下器材符合实验要求的电源已调零的电流表和电压表各一个开关一个阻值已知且不同的四个定值电阻R1R2R3和R4导线若干．请设计一个实验来验证上述结论．要求 1画出实验的电路图 2写出实验的步骤以及记录数据的表格．
如图所示在竖直平面内用轻质细线悬挂一个小球将小球拉至P点使细线处于张紧状态．由静止开始释放小球到最低点Q处细线恰好断裂若不计一切阻力下列说法正确的是
小乐利用光具座研究凸透镜成像的规律．当三个元件移动到图示位置时光屏中心出现了清晰的像．回答下列问题 1该凸透镜的焦距为cm． 2若在图示情况下小乐把蜡烛移到35cm刻度处凸透镜位置不变移动光屏后观察到的清晰像的性质应是写出像的正倒大小和虚实． 3若在图示情况下把蜡烛移到40cm刻度处凸透镜位置不变撤去光屏小乐直接用眼睛在原来放光屏处观察她能不能观察到清晰像为什么．
一扇矩形窗户重为60N设重力作用在几何中心高0.9米宽0.4米靠铰链A和B固定在窗户框架上并可以绕AB形成的竖直轴线转动其中AB＝0.6米． 1在图中画出A处窗户所受铰链的水平作用力F的示意图 2计算上述力的大小要求在图中画出相关力的力臂．
现有规格为“6V6W”的小灯泡L1“6V3W”的小灯泡L2因为铭牌模糊无法辨别．请选择合适器材设计实验方案同时进行比较辨别．器材有6V电源开关导线若干． 1请选择合适的元件画出电路图． 2简要写出实验过程及判断方法．
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. 修改在错的词下画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. Euan'sGuideisadisabledaccessreviewwebsitewheredisabledpeoplecansharehisexperiencesinvariousplacesandratetheiraccessibility.AsawheelchairuserIamazedwhenIcameacrossEuan'sGuide.Ifoundthereviewssohelpfullywhendecidingwheretogoincludedmuseumshotelsandmore.IstartedaddingtomyownaccessreviewsonEuan'sGuide.Anditdoesn'ttakelongtowriteafirstreview.Thiskindofwritingcanbedoneeasywhileonthegoorathome.Eachreviewcoversparkingtoiletsstaffandanythingelseyouwanttoadd.Youcanalsoaddsomeofyourphoto.Everyonehasdifferentaccessrequirementsbutit'sgoodtogetreviewsfromdifferentangles.
Last'weekataconstructionsitenearAustinTexasworkersheardthecriesofapuppy小狗.Theywentaroundtheconstructionsitetryingtofigureoutwherethesecrieswerecomingfrom.Theyfiguredthepuppywastrappedsomewhere.Thentheyrealizeditwasactuallycomingfromthesky.Highabovetheirheadsapuppywasflyingthroughtheair﹣intheclawsofahawk鹰.Atthatverymomentthebirdsuddenlyletgoandthetinyscreamingpuppy﹣noolderthan6weeksold﹣felltothem. Asidefromafewminor.woundsonhisheadthepuppywassurprisinglyunhurt.TheworkersquicklybroughthimtoamedicalclinicandfromtherethepuppyfoundhiswayintothecareoftheAustinAnimalCenter.Wedon'tknowwherehecamefrom﹣whetherhewasbornasastray流浪狗orwhetherhewasinahomeandgotoutOlohancommunicationsdirectorfortheAustinAnimalCenterexplains. TheparatroopergotanewnamethatcamenaturallyHewouldbecalledTonyHawk.Consideringhistininess﹣notmuchbiggerthanamouse﹣TonyHawkprobablyseemedlikeagoodideatoahungryhawk.TonyHawk'sfearscalmeddownsoonafterhefoundhimselfonthegroundmostlybecausehefoundafosterhometoeasehimintohisnewlife.Inamonthorsohewillbelookingforaforeverhome. Olohanthinkshewon'twaitlong.We'vehadplentyofinteresttonsofapplicationsforhimshesays.He'scertainlynotgoingtohaveaproblemfindingahome.Soatinypuppywithoutapastfoundhimselffreefromtheclaws﹣thankstothewarmcaringhandsthatwillhelphimshapeabrandnewfuture. 1Whathappened.tothelittlepuppy? A.Hefellfromabuilding. B.Hewascaughtbyahawk. C.Hewastrappedsomewhere. D.Hewasseriouslywounded. 2Whatdidtheconstructionworkersdotohelpthepuppy? A.Theytookhimtomedicalcare. B.Theyfoundafosterhomeforhim. C.Theyprotectedhimfrombirdattack. D.Theygotsomeinformationabouthispast. 3Whatdidtheparatrooperinparagraph3? A.Astray. B.Amouse. C.Thehawk. D.Thepuppy. 4WhatcanweinferaboutTonyHawk? A.Heisveryfierce. B.Hewillbeadoptedsoon. C.Hehasadaptedtonewlife. D.Hefacesalotofproblems.
请简要描述图片并结合你个人的经历谈谈你对如何利用好各种资源的看法.
HairLossAlopecia Informationaboutmalepatternbaldness秃顶causestriggersandtreatmentintheUK Incontrarylopopularbeliefhairloss﹣oralopecia﹣canstartatanyage.Whilstitisassociatedwithmaturemalesandstatisticsshowitdoesmainlyaffectmenabout40therealityisyoucannoticesymptomsinyour30soreven20sandteenyears.TheNHSstatisticsstatethat25%ofmenstartlosingtheirhairbythetimetheyreach30.Themostcommonformofhairlossismalepatternbaldness﹣alsoknownasandrogenicalopecia﹣thataffectsmorethanhalfofmenaroundtheworld. Oneoptionmanymenseekistreatmenttoavoidfurtherhairlossespeciallyearlyonintheprocess.WithtreatmentssuchasPropeciathatspecificallytargetmalepatternbaldnessitispossibletostophairlosscompletelyandevenencouragefreshnewhairgrowth. Whatisalopecia Alopeciaisthemedicaltermforhairloss.Mostcommonlyaffectingmaleshairlossinmeniscausedbyanincreasedsensitivitytothemalesexhormonesandrogens.Thetypeofalopeciayouhaveaswellashereditaryandexternalfactorscaninfluencelevelsofhairloss.Themostcommontypeofhairlossalopeciaismaleandfemalepatternbaldness.Othertypesinclude •Alopeciaareatapatchesofbaldnessusuallyonthescalp •Scarringalopeciahairlossdirectlyaffectingthehairfollicles •Telogeneffluviumhairthinningoveralargerareaonthetopoftheheadratherthanbaldpatches •Anageneffluviummostcommonlycausedbycancertreatmentssuchaschemotherapyandradiotherapy 60.WhichofthefollowingstatementsisFALSEaboutPropecia A.Itcanstophairlossalmostinallcases. B.Peoplecanbuyitonlinewithoutdoctorvisit. C.Itencouragesnewhairgrowthinrareeases. D.Itisespeciallyeffectiveonmalepatternbaldness. 61.Wecanlearnfromthepassagethatalopeciais. A.aninevitablepartofagingprocess B.morecommonamongmaturemales C.unnoticeablebefore40yearsold D.mostlyinfluencedbyexternalfactors 62.Thenextpartofthewebpageismostlikelytobeabout. A.hairlosscauses B.hairlosssymptoms C.preventinghairloss D.treatinghairloss.
我国著名化学家侯德榜先生发明了“侯氏制碱法”其原理中重要的一步是向饱和食盐水中先后通入足量NH3和CO2制备NaHCO3化学方程式NaCl+NH3+CO2+H2O═NaHCO3↓+NH4Cl 某兴趣小组在实验室模拟该过程请结合具体的步骤回答下列问题 I．气体制备 1二氧化碳气体制备 实验室常采用石灰石与稀盐酸反应制备CO2其化学方程式为．应选择的气体收集装置为选填装置对应的字母． 2氨气制备 实验室常用硫酸吸收氨气防止污染空气实验室制备NH3的反应原理为CaOH2固+2NH4Cl固CaCl2+2H2O+2NH3↑．现要制备并干燥NH3所选装置的正确连接顺序为→选择装置对应的字母．实验室制备O2也可用上述制备NH3的发生装置写出用该发生装置制备O2的化学方程式． II．NaHCO3制备 3根据表格中的溶解度数据解释20℃产物中NaHCO3能够先从溶液中结晶析出的原因． 4该过程中另一产物NH4Cl在农业生产中常被用作．
他遇事不够冷静因此不具备当飞行员的素质.qualificaion.
两支蜡烛用木棒相连接设法在其木棒中间插入一枚缝衣针把针的两端分别放在两个玻璃杯上将两端同时点燃发现蜡烛可以绕针轴上下来回摆动如图所示．关于此装置下列说法中正确的是
探究影响电磁铁磁性强弱的因素时按图示电路进行实验．逐渐增大电路中的电流进行多次实验每次都能观察到电磁铁甲吸引大头针的数目比乙多．此现象能够说明
Theyblockentrancescrowdstreetcornersandtipontotheirsidesturningaconvenientformoftransportationintoasidewalkdangerthatisparticularlydangerousfortheelderlyanddisabled. NowanewCaliforniacompanyisworkingonapossiblesolutionforstoppingthechaoscausedbyelectricscooters滑板车incitiesaroundthecountry.ThecompanyknownasSwiftmilehasunattendedchargingstationsfore﹣scootersthataredesignedtoserveasaplacewhereriderscanparkthescootersbetweenrides.Thecompany'sfounderColinRochesaidthesola﹣poweredchargingstations﹣whichcanacommodateanybrandofe﹣scooter﹣aremostsuitableforareasthatareoftencrowdedwiththescooterssuchasbusandsubwaystations. Astheweatherwarmsandridershipincreasesthatstruggleisexpectedtointensify.Onone.sideofthedebateexpertssayarecitieswhoseleaderswanttoreducetrafficandencouragealternativeenvironmentally﹣friendlypatternsoftransportationtobattleagainstclimatechangeandpromoteinnovation创新.Somelocalofficialsalsofearthatrestrictingscootercompanieswillcastcitiesinanoutdatedlightdiscouragingtechnologycompaniesfromdoingbusinessthereinthefuture.Ontheothersideofthedebatearecriticswhohavecomplainedaboute﹣scootercompaniesforblockingwalkwaysandsellingaproductwhoseusehasledtothousandsofinjuriesamongridersandpedestriansmanyofthemsevere. PatBurtaformerPaloAltomayorwhoiscurrentlyadvisingSwiftmilesaidthefutureofe﹣scooterscoulddependheavilyonwhathappensin2019.Citieshaveidentifiedthebenefitsofe﹣scootersaswellasthe.drawbackswhichcouldbecomeexistentialforthecompanies.Ifthe.safetyandotherproblemsaren'taddressedIthinkcitieswillrestrictthemevenmorehesaid.Butthere'sagoodchancescooterswillbeadopteduniversallyiftheseproblemsgetsolved. 1Whatisthemainideaofthefirstparagraph? A.Theelderlyareeasytogetinjured. B.E﹣scootersaredifficulttofind. C.Manyproblemsarecausedbye﹣scooters. D.Newinventionsprovidepeoplewithconvenience. 2Whatcane﹣scooterownersdoatthechargingstation? A.Parktheire﹣scooters. B.Gettheire﹣scootersrepaired. C.Havetheire﹣scooterscleaned. D.Chargetheire﹣scootersforfree. 3Whatbenefitscane﹣scootersbringtothecities? A.Attractingmoretourists. B.Reducingtrafficpressure. C.Makingtheroadsmuchsafer. D.Increasingthelocalcompany'sprofits. 4Whatdecidesthefutureofe﹣scootersaccordingtoPatBurt? A.Thepublic'sattitude. B.Theimprovementoftraffic. C.Thesolvingofpresentproblems. D.Thebenefitsofthenewbusinessmodel.
InCCTV'sannualconsumer﹣protectionshowearlierthismonththeinternationalsportsweargiantNikewasaccusedoffalseadvertising.Commercials21promotetheHyperdunkbasketballshoesclaimedtheproductisequippedwithhigh﹣techaircushions.TheCCTVprogramhoweverrevealedthattheproductdidn'tcomewiihthefeature.Consumerswereapparentlymisled. ThisisinfactnotthefirsttimeNike22catchcheatingChineseconsumers.Backin2011consumerscomplainedthatthatyear'sHyperdunksneakersdidn'thavethe23adveniseaircushionsinthemeither.SuchwrongdoingsmightnotmarktheendofNike24arespectableandreliablebrandamongloyalshoppersbutNikeneedstorealizethat25onedayconsumers'trustinitvanishes消失sowillitssales.Bythenitwillbeimpossibleforthebrandtorestoreitsreputation. ChinaisanimportantbaseforNike26itaccountsforabouttenpercentofthecompany'smarket.OverthepastthreedecadesnumerousNBAgreatsfromMichaelJordantoLeBronJameshavebeenshownwearingNike'sgearprovingitsquality. Placingmisleadingadvenisementsonceagainhasdampenedsomeconsumer'strustinNike.FortunatelyNikeissuedatimelyapologylastweekofferinga4500﹣yuanrefund27isthreetimesthecostoftheshoes.Thesegestures showthatthecompanyhassomewhatrealizeditsmistakeandwantstore﹣establishconsumers'trustinit. Sportswearcompaniesoftenpushthetruthoftheirproductsbyhavingfamousathleteswearingthem.IfUsainBoltisseeninacommercial28dashwithNikeitmightbeimpliedthattheshoes29enableyoutorunfaster.Howevertherearelimitsto30canbesaidtopromoteaproduct.Withlyingcomesdistrustandwithdistrustcomescollapse.That'swhyNikeandanyothercompanyneedstobemorecarefulwithadvertisinginthefuture.
以下有关物理量的测量符合生活实际的是
一包白色粉末可能有CaCO3K2SO4CuSO4BaCl2K2CO3的一种或几种现在进行如下实验．其中说法错误的是
如图电路电源电压恒为3VR1＝10ΩR2是规格为“20ΩlA”的滑动变阻器．闭合开关S后在向左移动滑片P的过程中下列说法正确的是
小明查阅资料了解到出于安全考虑电梯都设置超载自动报警系统其工作原理如图甲所示电路由工作电路和控制电路组成在工作电路中当电梯没有超载时触点K与触点A接触闭合开关S电动机正常工作当电梯超载时触点K与触点B接触电铃发出报警铃声闭合开关S电动机不工作．在控制电路中已知电源电压U＝6V保护电阻R1＝100Ω电阻式压力传感器压敏电阻R2的阻值随压力F大小变化如图乙所示电梯底架自重和电磁铁线圈的阻值都忽略不计． 1在控制电路中当压敏电阻R2受到的压力F增大时其阻值减小从而使电磁铁的磁性填“增强”“减弱”或“不变”． 2某次电梯正常运行时测得通过的电磁铁线圈的电流为10mA此时电梯载重为多少 3若电磁铁线圈电流达到20mA时衔铁刚好被吸住电铃发出警报声．当该电梯厢内站立总质量为1000kg的乘客时试通过计算说明电梯是否超载g取10N/kg
当前人工智能AIArtificialIntelligence技术正渐渐进入人们的生活像无人机家居机器人等．都是人工智能的初级应用一些高级人工智能应用如无人驾驶系统正在研发中．下列有关人工智能AI以及科学知识的描述合理的是
A.Youareonlyallowedtopuxchaseafirearmifyouhavehadabackgroundcheckandmeetcertainlegalrequirements. B.TherehavebeenmanyenlighteningarticlesonguncontrolinAmerica. C.IfyouweretovisittheUnitedStatesfortwomonthstheonlygunyoumightseeisinamuseumoronapoliceofficer. D.LessthanfiftypercentofhomesintheUnitedStatesownweaponsandmanyofthosehomesareinruralareaswheregunsmayhaveagreateruse. E.Morepeoplearedecidingtolegalizetheirguntransactionsinsteadofbuyingthemontheblackmarket. F.WhatalarmspeoplethemostaboutAmericangunculturearetheillegalgunsandshootingwhichmakesomeplacesfeelunsafe. GunshaveaspecialplaceinAmericancultureandthoughnoteveryoneagreesonwhetherornottheyareagoodthingthereisnomistakingthattheywillbepartoftheculturallandscapeforsometime.Toanswerthequestionnonoteveryonehasagun.67 Americansusegunsforoneoftwouseseitherforsportwheretheycanusethemonfiringrangesorforhuntinginapprovedareasorforself﹣protection.Thelatteriswheremostpeoplebegintotakesideseitherarguingfortheremovalofgunsfromsocietyorallowingmorepeopletohavethem.Thereareorganizationsandcommunitygroupsforbothsidesandbothsideshavestrongfeelings. Legallytherearerestrictionsongunowners.68Onlycertainkindsofweaponscanbepurchasedbythepublicandthatexcludesautomaticweaponandmilitarygradeweaponry.Gunownersmusttransporttheirweaponinasafewayunloadedandinmostcasesoutofsight.Specialconcealedcarrypermitsfromthepolicestationmustbeobtainedforpeoplewhowanttowearweaponandmostpeoplearerejectedforthiskindofpermit.69Criminalsstealgunsorbuythemillegallytocommitcrimesandthenewsisfullofterriblestoriesofwhathappenednext.Occasionallyachildwillgetaholdoflegalweaponandaccidentallyhurtthemselvesorothers. ItisimportanttorememberhoweverthatthenewsstoriesthatmaketheUnitedStatesseemlikeadangerousplacearedeceivinggunsarcnoteverywhereorconstant.70AfterallAmericaisasafeplacetolive.
为了除去铜粉中混有的铁粉并用提纯的铜粉制取胆矾CuSO4•5H2O某课外活动小组的同学按如下流程进行实验反应中部分生成物已略去． 已知Cu+2H2SO4浓CuSO4+SO2↑+2H2O回答下列有关问题 1操作a的名称是除去铜粉中的铁粉最简便的实验方法是． 2A溶液的溶质为A到B的反应中溶液最终变为黄色发生了化合反应则反应的方程式为 3由Cu制CuSO4溶液的途径Ⅱ中反应的方程式为产物为硫酸铜和一种液体．途径Ⅱ与途径Ⅰ相比较其显著的优点是回答一点即可． 4硫酸铜溶液如何转化为胆矾浓缩和蒸发结晶或降温结晶
图甲是一个豆浆机的实物图豆浆机的中间部位是一个电动机电动机通过金属杆带动其下部的刀片旋转从而将原料粉碎打浆刀片外部是一个环状加热管电热丝用来对豆浆加热该豆浆机的部分参数如表所示．制作豆浆的过程是加热和打浆交替进行图乙是该豆浆机做好一次豆浆的P﹣t图象．求 1加热管正常工作时电阻丝的阻值是多少 2在8～11分钟的时间内设豆浆质量为1.5kg比热恒为4×103J/kg•℃加热管产生的热量全被豆浆吸收到第11分钟时豆浆温度恰好为100℃则第8分钟时豆浆温度为多少 3豆浆机在粉碎打浆时电动机的内阻为40Ω则电动机输出的机械功率是多少
如图所示对于图片中所描述的物理过程下列分析中正确的是
每年56月是蓝莓丰收的时节蓝莓中含有丰富的花青素化学式为C15H11O6．花青素是一种水溶性色素颜色与细胞液的酸碱性有关细胞液酸性时呈红色碱性时呈蓝色． 1在白醋中滴加花青素溶液变色． 2一个花青素分子中共有个原子． 328.7克花青素中含有多少克碳元素请列式计算
TheSecrettoSurvival In2006ateenagernamedBillwhowaslateforworkdrovethroughthecitysofastthatheknockedintomycar.Afterthe1Ispentthenextmonthinhospital.The2wasabout$130000.Totopitoffdoctors3itwouldtakeanentireyearformetorestoretohealth. Itseemedasifitwasn't4thatIwasalreadydealingwithpoverty贫困andmusculardystrophy肌肉萎缩症.Solifedecidedtopileonalittle5justtoseehowmuchIcould6.Atthattimemylifeseemedtotally7. How8wouldithavebeento9desperation?Orangeragainstthe10?ButIdidn't.InsteadI11myselftosayOkaythisismylifenow.What'snext?AfterallIcouldn't12whathadhappened.TheonlythingIhadcontroloverwashowI13tothatchange.Andthefirstandmost14responsewastotalandcomplete15.Alotofpeopleviewitas16.Theythinkthatiftheyacceptwhat'shappenedtothemthey'llbe17defeat.Butit'stheopposite.It'sonlyby18realitythatyoucancreateaplantochangethatreality.Acceptanceisthefirststeptoyour19. 20Ifoundwaystocoverthemedicalexpenses.MeanwhileitonlytookmesixmonthstorecoverinsteadofayearasdoctorspredictedandIrestartedmylifeevenhealthier. 1A.accident B.meeting C.coincidence D.treatment 2A.car B.bill C.reward D.fine 3A.predicted B.promised C.argued. D.permitted 4A.fair B.ordinary C.special D.enough 5A.work B.regret C.comfort D.extra 6A.lose B.earn C.take D.pay 7A.hopeless B.lonely C.pointless D.busy 8A.lucky B.easy C.unusual D.wonderful 9A.getridof B.sinkinto C.smell D.face 10A.discrimination B.punishment C.misfortune D.abuse 11A.allowed B.forced. C.forbade D.expected 12A.change B.explain C.plan D.announce 13A.responded B.linked C.contributed D.submitted 14A.desired B.natural C.vital D.aggressive 15A.resistance B.acceptance C.agreement D.commitment 16A.virtue B.courage C.weakness D.challenge 17A.valuing B.avoiding C.foreseeing D.admitting 18A.escaping B.representing C.ignoring D.acknowledging 19A.world B.health C.victory D.independence 20A.Eventually B.Generally C.Exactly D.Normally
电动机是一种使用广泛地动力机械．从能量转化的角度看它主要是把电能转化为机械能还有一部分能量在线圈中以热量的形式散失掉． 1安装完毕闭合开关后发现电动机的转动方向与要求的相反他们怎样做才能达到要求 2如果某电动机线圈的电阻为R电动机工作时两端的电压为U通过电动机的电流为I请推导此电动机电能转化为机械能的效率． 3改进实验后使电动机转轴转动移动滑动滑片记下电压表和电流表的示数数据记录如下如在正常工作时转子突然被卡住此时电动机的发热功率多大
无论有多么不满我父母都不会在我的朋友面前使我感到难堪.Nomatter.
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