首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
用不等式表示：y与4的和大于0.5．
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
用不等式表示y的一半与6的和是负数______
用不等式表示下列语句并写出解集y与1的差不大于0.
x减去y不大于﹣4用不等式可表示为.
用不等式表示下列语句并写出解集8与y的2倍的和是正数
用不等式表示下列各式并利用不等式性质解不等式m的2倍与1的和小于7
用不等式表示y＋5是负数______
x与y的和大于7用不等式表示为．
用不等式表示下列各式并利用不等式性质解不等式a与4的和的20%不大于－5
用不等式表示下列关系a与b的和大于a的2倍而小于b的3倍.
用不等式表示:x与6的和小于3_______________;x与2的差不大于-1_________
用不等式表示下列各式并利用不等式性质解不等式a的是非负数
用不等式表示x的2倍与5的差不大于1
用不等式表示x不大于2______
x与y的和大于1用不等式表示为．
用不等式表示下列各式并利用不等式性质解不等式x的与x的3倍的和是非负数
y的3倍与x的4倍的和是负数用不等式表示为____________.
x的2倍与12的差大于6用不等式表示为.
x与1的差大于3用不等式表示为_______.
用不等式表示x的一y的3倍的差不小于.
用不等式表示a与3的和的30%不大于5
热门试题
更多
下面图1为碳循环示意图图2为某一食物网示意图请据图回答问题 1生态系统的结构包括． 2通过过程①碳由无机环境中的转变成绿色植物如玉米中的． 3一般图1过程②越复杂则该生态系统抵抗外界干扰的能力越．设过程②代表的生物之间有如图2所示的关系若E种群的能量为5.6×109kJB种群的能量为1.3×108kJD种群的能量为1.5×108kJ能量传递效率为10%则A种群的能量是kJ． 4过程④表示作用．参与过程④的生物与同区域中的动植物等其他生物共同构成了． 5由图1可见碳循环的特点是．伴随物质循环进行的能量流动的特点是．
一般情况下关于有丝分裂与减数分裂的结论正确的是
下列关于细胞结构和功能的叙述正确的是
为研究焦虑症的机理科研人员利用四组小鼠为材料进行实验． 1科研人员敲除野生型小鼠WT鼠的焦虑抑制基因﹣﹣N基因得到N基因敲除鼠N﹣KO鼠．N﹣KO鼠进入图1所示高架十字迷宫的开放臂时视网膜感光细胞接受刺激产生沿神经传至相关脑区的神经中枢引起恐惧和焦虑行为因而更多地躲进封闭区．WT鼠在探索新奇环境的冲动下会重复进入开放臂玩耍． 2科研人员推测I基因与N基因有相似的功能为验证该推测科研人员用相同方法得到I基因敲除鼠I﹣KO鼠和N基因I基因双敲除小鼠NI﹣KO鼠．若推测正确则I﹣KO鼠在图l所示迷宫上的预期行为表现是实验结果显示．I﹣KO鼠NI﹣KO鼠与WT鼠的行为表现一致这一实验结果与上述推测选填“相符”或“不相符”．由此推测I基因对小鼠产生焦虑情绪的作用是． 3研究发现B区和C区是处理焦虑等情绪的两个关键脑区如图2科研人员将上述四种小鼠置于图l所示迷宫上一段时间后检测小鼠两个脑区中神经元的活跃度．得到图3所示结果． ①据图23可知N﹣KO鼠C区输出的抑制信号增强导致出现焦虑行为． ②请对实验结果进行分析解释NI﹣KO鼠与WT鼠行为一致的原因． 4科研人员再选取上述小鼠进行实验进一步验证I基因的功能图4为实验方案． ①请在图4中正确选择abc或物质de填人I﹣Ⅳ处． ⅠⅡⅢⅣ． ②预期l﹣4组小鼠在高架十字迷宫实验中的运动轨迹依次为图5中的．
Irealizethatweallliveinaworldwheretrustisinshortsupply.I'seemsthateverywhereIgoIhaveto41myidentityandtrustworthiness﹣whetherit'sabankshoporanyofficeIhavebeenaccustomedtolivingbythe42thatnooneistrustworthy43provedotherwise. Yesterdaylsawayoungmanwholivedbyatotally44ruleIwaswakingalongabusyintersectionwhenI45ayoungmanstandingnear.thepedestriancrossingsettingupastall货摊.46IwouldignoreandhurrypastsuchsellersButInoticedthisyoungmanwas47soIstoodforsometimewithoutcrossingthestreettoseehowhesoldhis48 Soonayoungmotherwithalittleboycamebyandthechildsethis49ononeofteddybearsThemotheraskedthe50anditwasonlyonedollar.Shepulledoutalodollarnoteand toldtheyoungmanthatshewasgivinghim10dollarsandwantedthe51back.Iwas52toknowhowhewasgoingtodoitHetoldthemomtoputthe53inthepouch袋子hangingaroundhisneckandtakeoutwhateverchangehe54herlrealizedthatthisyoungman'swholemodeofearning55.ontrustingpeoplenottocheathim.Therewasno56forhimtoknowifsomeonetookoutmoreoutofhispouchofearninglwasso57byhowthisyoungmantrustedpeoplethatIboughtacarmodelfromhimIdidnotneedit58.IjusthopedtohelpalittleNowl59believethattheworldwouldbeabetterplaceifwecouldalllearnto60othersmoreliketheyoungblindstreetselleroftoys. 41.A.introduce B.present c.prove D.request 42.A.rule Bhabit Cpractice D.law 43.A.if B.since Calthough D.unless 44.A.similar B.different C.special D.common 45.A.approached B.noticed C.watched D.looked 46.A.Actually B.Normally C.Informally D.Casually 47.A.blind Bhandsome C.disabled D.strange 48.A.clothes Bbears Ctoys D.pouches 49.A.mind Binterest Cheart D.attraction 50.A.price Bstall Ctoy D.help 51.A.money Bcharge Cchange D.note 52.A.anxious B.surprised C.pleased D.curious 53.A.hand Bmoney Cteddybear Dnecklace 54.A.gave Bowed Cowned D.showed 55.A.depended B.settled C.decided D.focused 56.A.problem Bpoint Cway D.doubt 57.A.attracted. Bshocked Cexcited D.touched 58.A.either B.instead C.moreover D.though 59A.firmly B.tightly Cunwillingly D.negatively 60.A.takein B.turnto Chelpout D.believein
发生在叶绿体和线粒体中的部分代谢活动正确的叙述是
下列有关人类遗传病的说法正确的是
SteepRockSkills﹩100perperson.Thiscoursewillfocusontechniquesaboutclimbingsteeproutes.Edgingoffhandshigh﹣steppingaresometechniquesyouwillworkon.Thiscourseisbestforwomenthathaveexperienceoftopropingorclimbingoccasionallyinagymbuthavenothadmuchexperienceoutdoors. Half﹣DayRappelling绳索下降Skills﹩100perperson.There'salawthatsaysWhatgoesupmustcomedown.ThoughitmaybesafertowalkoffmanyclimbsthereareclimbsthatrequireyouladiestocomebackdowntothegroundLearnvariousrappeltechniquesandusevarioustypesofrappeldevicesthroughthiscourse.OnSaturdaythepracticeisinthemorning. HardWomenRockleaderSkills﹩100perperson.Designedforanywomenwithadesiretoleadefficientropemanagementwillbecovered.Bringyourownequipmentifyouhaveany.Anyleadingwillbedoneontop﹣rope.Afunandsafewaytotakealookatthesharpendofthing. Half﹣DayRockRescue﹩50perperson.Acourseforexperiencedwomenclimberswishingtobuildfundamentalrockrescueskillsinordertodealwithapossibleemergencysituationonthecliff.Participantsshouldbringtheirownpersonalequipmentiftheyhave..OnSaturdayandSundaythepracticeisinthemorning. 21.Whichcourseistheleastexpensive? A.HardWomenRockLeaderSkills. B.SteepRockSkills. C.Half﹣DayRockRescue. D.Half﹣DayRappellingskills. 22.IfMarywantstobearock﹣climbingleaderwhichofthefollowingshouldshechoose? A.SteepRockSkills. B.Half﹣DayRappellingSkills. C.Half﹣DayRockRescue. D.HardWomenRockLeaderSkills. 23.Itcanbeinferredfromthetextthat. A.thecoursesarespeciallyforwomen B.thecoursesarelimitedto100persons C.itmaytakehalfadaytoattendthecourses D.menareallowedtoparticipateinthepractice 24.Theauthor'spurposeinwritingthetextistointroduce. A.howtobewomenrockclimbers B.variouscoursesonrockclimbing C.whattodoatweekends D.howtokeepfit
生物兴趣小组为探究影响插条生根的因素以同一植株的枝条为材料开展研究．他们用营养素和生长调节剂X处理枝条后得到如下结果．据图分析下列推断合理的是
Whenwewerechildrenweweretaughtthesimplestlessonstobeabletobuildgoodrelationshipswithothers.36HoweverthequestionisWhatmakesagoodrelationship? Bewillingtoshare Onceyouareinagoodrelationshipyouarenotjustthinkingaboutyourself.Youlearntosharewhatyouhave.37Youshouldalsoshareyourthoughtsyourideasyourdreamsandevenyourfrustrations. Learntocare Peopleinagoodrelationshiparekindtoeachother.Theymakeeffortstoshowhowtheyvalueeachothers'space.Theybothtakethetimetoknowwhatmatterstotheotherandalsogivelimetotryouteachothers'interests38 Learntoplayfair 39EachoneisallowedtomovefreelyasanindividualHowevereachactionisdone«withconsiderationoftheotherone'sfeelings.Nooneisabovetheother. 40 Ahealthyunionisboundbycooperation.Thepeopleinvolvedworkasateamtoachieveonegoal.Eachonehelpsandsupportstheothertosucceedintheirindividualendeavors.Theyappreciateeachotherandtheygrowtogetherandasindividualsaswell. A.Learntocooperate B.learntoworkhardtowardsyourgoal C.Agoodrelationshipisatwo﹣waytraffic. D.Thisdoesnotjustincludematerialthings. E.Everyoneknowsthattherelationshiptheyhavewon'tslaystrong F.Havinggoodrelationshipswillmakeyouneverhavetoliveyourlifealone. G.Mostofalltheycareenoughtolisten10eachotheranddonicethingsforeachother.
色彩鲜艳的果实给人提供营养芳香气味的花卉使人神清气爽．请回答下列问题 玫瑰鲜花+清水油水混合物→分离油层除水玫瑰油 1提取玫瑰精油的流程示意图如上请写出①②分别代表的方法或物质①②． 2番茄中所富含的番茄红素属于类胡萝卜素常采用法进行提取操作过程中需进行水浴加热的原因是． 3番茄红素粗品进行鉴定时可采用方法．而血红蛋白的纯度鉴定最常用的方法是电泳这种方法的电泳迁移率主要取决于． 4用番茄制备番茄汁时加入果胶酶使果汁变澄清的原因是．
假定你是李华在打扫房间卫生时不小心把美国室友Bill的钟弄坏了因此你感到很内疚.请用英语给他写一封道歉信.信的内容包括 1.表示歉意 2.说明事情缘由 3.提出赔偿. 注意 1.词数100左右 2.可适当增加细节以使行文连贯 3.开头和结尾己为你写好不计人总词数.. DearBill Yours LiHua.
以下实验观察到的现象与结论匹配正确的是
NancywasnewtoAmerica.She61cometoAmericaspeakingonlyhernativelanguage.Shebroughther8﹣yearoldsonwithher.Hewasallshehadintheworld. Theyfound62apartmentinArcadia.Theywerethereforonlytwomonthswhena63neighbordogjumpedoverthefence.ThedograntowardNancy'ssonNancyputherbody64thedogandherson.ThedogstoppedwhenitsawNancyscreamingatit.Shewasgoingtohititinthenosewhenthedogturnedaround. 65shakeNancytookhersonupstairs.TheystayedintheapartmentallweekendandthenNancyfound66one.Theapartmentisclosetotheschoolthathersonwasgoingtoattend. Sheandhersonwalkedeverywhere.Onedayhersonstartedcoughingbadly.67obvioushehadanasthma哮喘attack.Allthewalkingwasmakinghisasthmaeven68bad. Nancyknewthatshehadtobuyacar.SoshecalleduptheHondadealer.Shetalkedtoasalesman69spokeherlanguage.Shetoldhimthatshewanted70buyanewcarifhecouldcomeovertopickherup.Thesalesmansaidhewouldberightover.
下列关于观察洋葱根尖分生组织细胞有丝分裂实验的叙述错误的是 ①解离的目的是使组织细胞彼此分离开来 ②在显微镜下可观察到细胞连续分裂的过程 ③装片制作的流程为解离→漂洗→染色→制片 ④视野中处于分裂期的细胞数目最多
Chancesarethatyou'vehadtoapologizeplentyoftimesinyourlife.Andthere'sagoodchancethatyou'vealsoexpressedthephraseInevermeanttohurtyou. StopdoingthatsaysauthorCarolineMyss. InatalkMyss﹣aspiritualresearcher﹣tookonthetopicofforgivenessandhealingandexplainedinnouncertaintermswhyInevermeanttohurtyouisneverasufficientapologyn.matterwhoitcomesfrom. Picturethatpersoncominguptoyouandsaying'Wowl'msorryIdidthisbutyouknowlnevermeanttohurtyou.Andheycanwejustcallitaday?'Mysssays. Thoughitcanmakethetwobur\thehatchetandkeepfriendshipthattypeofapologywon'tsitwellwiththepersononthereceivingend.Thatwholelittlething﹣'Inevermeanttohurtyou'﹣that'sthethingyoucan'tforgiveshesays.Itgoesrighttoyoursoulthattoxic育毒的中毒的sickfeeling. InsteadMysssaysit'simportanttoapproachtheconversationdifferently.Basicallyit'saboutofferingmorethananapology.It'saboutsharingasoul﹣to﹣soulconfession仟悔.Let'sredothesceneMysssays.Thepersoncomesuptoyouandsays…'Ineedtotellyousomething.IconsciouslyknewwhatIwasdoing.IknowIwentagainstyou.Thisisnotanapology.1amconfessingmysoultoyouandl'maskingnowforyourforgiveness.' EvensayingthosewordsonstagesmakesMyssvisiblyemotionalandshepointsoutthatthisishowdeeplyapologieswithinthesoularesupposedtoresonate引起共鸣. That'swhathealsshesays. 24.WhatdoesMyssthinkoftheexpressionInevermeanttohurtyou? A.Itmustputthefriendshiptoanend. B.Itisagreatwaytoexpresstheapology. c.Itdoesn'thaveanyeffectonrestoringtherelation. D.Itcan'texpresstheapologythoroughlyandsincerely. 25.Whatdoestheunderlinedphraseburythehatchetmean? A.endthefriendship B.makeup C.burythefightingtool D.accepttheapology 26.HowshouldweapologizeaccordingtoMyss? A.Weshouldconfessourfaultsandaskforforgiveness. B.WeshouldsaysincerelyInevermeanttohurtyou. C.Wecangointoadeepconversationtoarguewithourfriend. D.Wearesupposedtomakeupwiththeotherbygivingsomegiftstohim. 27.Whatistheauthor'spurposeofwritingthepassage?. A.Toencouragepeopletoapologizefirst. B.Totellpeoplehowtoapologizesincerely. C.Tointroducethetopicofforgivenessandhealing. D.Toexplainwhypeoplecan'tsayInevermeanttohurtyou.
某课题组研究了激素类似物甲和激素类似物乙对微型月季插条生根的影响实验结果如图所示下列分析错误的是
在沙漠高温条件下某种植物夜晚气孔开放吸收CO2合成有机酸储存在液泡中白天气孔关闭储存的CO2释放出来用于光合作用．下图为该种植物24h内CO2吸收量和有机酸含量的变化．请回答下列问题 1该种植物光合作用所需CO2的主要来源是和． 2图中a～8时CO2吸收量急剧下降原因是． 3与a时前相比a时后该种植物光合作用强度填“增强”“减弱”或“不变”理由是．
下列关于体外处理“蛋白质﹣DNA复合体”获得DNA片段信息的过程叙述正确的是
第一节短文改错 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. DearTom IamgladtohearthatyouaregoingtoCanadatostudy.SoIwaswritingtotellyouanythingaboutthiscountry. LocatinginNorthAmericaCanadaisthesecondlargecountrywiththelargestnumberoflakesintheworld.Themajorityofpeoplelivesinthecenterofthecountry.HoweverIsuggestthatyouchosetostudyintheeastbecausetherearemanyinternationalstudentshereandthetuitionislower.Duringyourstudyyoucantakethepartinmoreactivitiesafterclasswhereyoucanmakemorefriendsfromdifferentcountry.Inthiswayyourlifewillrichandcolorful Hopeyouwillhaveawonderfullifethere. Yours LiMing
假设你是李华上周在网站上购买了一款三星Samsung手机使用后发现该款手机音量比国产手机小的多操作起来不符合自己的习惯特别是最近媒体上报道了该品牌手机发生多次爆炸这些影响了你的心情.你现在给该网站写封电子邮件要求该网站按照承诺退货. 注意1.词数100左右开头已为你写好但不计入总词数. 2.可以适当增加细节以使行文连贯. 参考词汇音量volume .
橘小实蝇为害多种水果和蔬菜．在治理虫害时农业技术员先使用性引诱剂诱杀雄性成虫再释放不育雄性成虫使其与田间雌虫交配产下不能孵化的卵最后引入它的天敌﹣﹣寄生蜂进一步消灭橘小实蝇．下列相关分析正确的是
TomWhat'supJenny?Youarelookingunhappythesedays. JennyIgetaCinthisexam.Thisresultisfar61myintendedtarget.Whydosomanyfailureshappentome? TomDon'tbeupsetJenny.AstheChinesesaying62goFailureisthemotherofsuccess.Iknowitisnoteasytoacceptfailure.Howeverfailureis63greatvaluetous. JennyGreatvalue?Youmustbejoking! TomI'mserious!Iremember64IwasastudentmanyyearsagoIorganizedacampwithmyclassmates 65turnedouttobeadisaster.Ouractivitiesweretooclosetogetherandwedidn'thaveenoughtimeformealandnotimetoprepareandcleanup.Weendedupeatingsomuchwithina66givetimeandmanyhardlyhadtimeeventovisitthebathroom!Iamsuretheywere67completedisappointedwithus.Howeverourteachergavemethefreedomtoleadandthefreedomtofail. JennyYoudobecomeagoodleadernow. TomYeah.ManyyearsdowntheroadIhavebecomegoodat68organizeasimilarcamp.Thehistoryofscienceisfilledwithsuchstories.Mostsuccesses69gainthroughfailuresandpersistence. JennyWellwhatshallIdoatpresent? TomYoushouldhaveconfidenceinyourwork.Andmakegood70prepareforyournextexamination.Alldevotionwillpayoffandyouwillsucceednexttime. JennyThankyou.Ihavelearnedmuchtoday.
2019年1月15日随嫦娥四号登陆月球背面的生物科普试验载荷中棉花种子成功发芽．生物科普试验载荷内搭载了棉花油菜土豆拟南芥酵母菌和果蝇六种生物作为样本将它们均放置于密封的生物科普试验载荷罐内让它们形成一个简单的微型生态系统．请回答下列有关问题 1在一定时间范围内理论上载荷罐内填“能”或“不能”进行物质循环原因是． 2载荷罐能在一定时间内维持相对稳定这是因为生态系统具有一定的能力但载荷罐的抵抗力稳定性很低原因是． 3在设计并制作生态缸观察其稳定性的过程中在生态缸中铺好沙土和花土加水放置好动植物后还需要后将生态缸放置于室内通风光线良好但要避免阳光直接照射的地方．在生态缸中添加小动物则应注意各营养级生物之间的合适比例从能量流动的角度分析这是因为．
光合能力是作物产量的重要决定因素．为研究水稻控制光合能力的基因科研人员获得了种植株高度和籽粒重量都明显下降的水稻突变体并对其进行了相关实验． l叶绿体中的光合色素分布在类囊体膜上能够和利用光能．光反应阶段生成的ATP和[H]参与在场所中进行的C3过程该过程的产物可以有一系列酶的作用下转化为蔗糖和淀粉． 2科研人员用电镜观察野生型和突变体水稻的叶绿体结果如下图所示与野生型相比突变体的叶绿体出现了两方面的明显变化①②．此实验从水平分析了突变体光合产量变化的原因． 3半乳糖脂是类囊体膜的主要脂质成分对于维持类囊体结构具有重要作用酶G参与其合成过程．测序发现该突变体的酶G基因出现异常．科研人员测定了野生型突变体和转入酶G基因的突变体中的半乳糖脂及叶绿素含量结果如表所示． 对比三种拟南芥的测定结果可知． 4综合上述研究请解释在相同光照条件下突变体产量下降的原因． 5若要利用酶G基因培育高产水稻一种可能的思路是将酶G基因转入选填“野生型”或“突变体”水稻检测是否提高．
研究者得到B基因突变P基因突变和BP基因双突变小鼠持续在一定剂量紫外线照射条件下培养上述三组小鼠一段时间后统计小鼠皮肤上黑色素瘤一种皮肤癌的数目得到如图所示结果．下列相关叙述不正确的是
Anewstudyhasfoundthatsocialmediacouldbeaffectingthesleepofyoungadults. ThestudyisaprojectofresearchersattheUniversityofPittsburgh'sSchoolofMedicine.Theyfoundthatyoungpeoplewhooftenusesocialmediaaremorelikelytosufferfromsleepdisordersthanthosewhousesocialmedialess.Theresearcherssaydoctorsshouldaskyoungadultsabouttheiruseofsocialmediawhentreatingsleepissues. Thisisoneofthefirstpiecesofevidencethatsocialmediausereallycaninfluenceyoursleep.saidJessicaCLevenson.Shewastheleadauthorofareportonthestudy. Theresearcherssetouttoexaminetheconnectionbetweensocialmediauseandsleepamongyoungadults..Levensonnotedthattheseyoungadultsarepossiblythefirst**generationtogrowupwithsocialmedia. TheresearcherswantedtofindouthowoftenyoungpeopleusedsocialmediasiteslikeFacebookTwitterCreditandTumbler.Forthestudytheygavequestionnairestonearly1800adultsaged19to32.Onaveragemembersofthestudygroupusedsocialmediasitesonehouraday.Theyalsovisitedvarioussocialmedia30timesperweek. Thirtypercentofthestudy'sparticipantsreportedhavingseriousproblemswithsleeping.Thosepeoplewhousedsocialmediaalotwerethreetimesmorelikelytohaveasleepdisorder.Andthosewhospentthemosttimeonsocialmediaweretwotimesaslikelytosufferfromsleepdisturbances. Levensonsaidthenumberoftimesapersonvisitssocialmediaisabetterpredictorofsleepproblemsthanoveralltimespentonsocialmedia.Ifthisistruesheaddsthenpracticesthatstopsuchbehaviorsmaybethemosteffective. 29.What'sthemainideaofthetext? A.Theresearchersfocusonsocialmedia. B.Theresearchersmanagetohandlesleepproblems. C.Socialmediaaffectssleep. D.Doctorstreatyoungpatients. 30.Whentreatingsleepproblemsdoctorsareadvisedto• A.offersomeadviceaboutgivingupsocialmedia B.askthepatientsaboutyoungadults'useofsocialmedia C.giveyoungadultssomemedicine D.askaboutthepatients'livingconditions 31.Howdidtheresearchersmainlycarryoutthestudy? A﹣Bydoingonlineresearch. B.Bydoingquestionnaires. CBycollectingpublisheddata. D.Bygivinganexample. 32.Whatcanbeinferredfromthetext? A.Menaremorelikelytosufferfromasleepdisorderthanwomen. B.Peopleoftenusingsocialmediaarelesslikelytohaveasleepdisorder. C.Usingcomputerslesshelpsavoidsleepproblemscompletely. D.Sleepproblemscanbedeterminedbythetimesofapersonvisitingsocialmedia.
Zebracrossings﹣thealternatingdarkandlightstripesontheroadsurface﹣aremeantreminddriversthatpedestriansmaybetryingtogetacross.Unfortunatelytheyarenotveryeffective.A1998studydonebytheDepartmentofTrafficPlanningandEngineeringatSweden'sLundUniversityrevealedthatthreeoutoffourdriversmaintainedthesamespeedorevenspeededupastheywereapproachingacrossing.Evenworse?Only5%stoppedevenwhentheysawsomeonetryingtogetacross. Nowamother﹣daughterteaminAhmedabadIndiahascomeupwithacleverwaytogetdriverstopaymoreattention﹣A3﹣Dzebracrossingwithanopticalillusion视错觉. ArtistsSaumyaPandyaThakkarandShakuntalaPandyawereaskedtopaintthecrosswalksbyIL&FSanIndiancompanythatmanagesthehighwaysinAhmedabad.Thecorporationwaslookingforacreativesolutiontohelpthecity'sresidentstocrossthebusyaccident﹣prone易出事故的roadssafely.ThakkarandPandyawhohadpreviouslyseenimagesof3﹣Dzebracrossingsthatgavedriverstheillusionoflogs原木ofwoodonthestreetsinTaizhouChinadecidedtotestifasimilarwaywouldworkinIndia. Sureenoughinthesixmonthsthatthe3﹣Dcrosswalkshavebeenpaintedacrossfourofthecity'smostdangeroushighwaystherehavebeennoaccidentsreported!Theartistssaythatwhileitmayappearthatthezebracrossingcouldcausethedriverstobrakesuddenlyandendangerthevehiclesbehindsuchisnotthecase.Becauseofthewaythehumaneyeworkstheillusionisonlyvisiblefromadistance.Astheygetcloserthepaintinglooksjustlikeanyotherordinaryzebracrossing.ThecreatorshopethattheirsmartdesignwillbecomeincreasinglycommonthroughoutIndiaandperhapseventheworld.Solet'slookforwardtoit. 32.Whatcanwelearnfromthefirstparagraph? A.Mostdriverswillslowdownatzebracrossings BCommonzebracrossingsdon'tfunctionwell CDrivershavetostopwhenapproachingzebracrossings D.About95%ofthedriverschoosetospeedupwhenapproachingzebracrossings 33.Whydodriversseeingthe3﹣Dzebracrossingsslowdown? A.Becausethedriversconsiderthesafetyofpedestrians BBecausethedriversmistakethemforlogsofwoodOnthestreets C.Becausethedriversareafraidofbeingfinedforbreakingthetrafficrules D.Becausethedriversdon'twanttobrakesuddenlyandendangerthevehiclesbehind 34.Thelastparagraphismainlyabout A.thetheoryofthe3﹣Dzebracrossings B.thepopularityofthe3﹣Dzebracrossings C.theshortcomingofthe3﹣Dzebracrossings D.thepositiveeffectofthe3﹣Dzebracrossings 35.Whatistheauthor'sattitudetowardsthe3﹣Dzebracrossings? A.Cautious BDoubtful C.Approving D.Disapproving.
如图为豌豆的一对相对性状的遗传实验过程图解和花色产生代谢途径请仔细阅图后回答下列问题 1操作②叫为了确保杂交实验成功①的操作过程中应注意． 2花色遗传遵循定律基因型为的紫花植株各自自交子代都表现为紫花植株白花植株＝31．若将基因型为AaBb的个体进行花药离体培养预计所得植株中可育的紫花纯种所占比例是． 3用这4个品种做杂交实验结果如下 实验1紫花×白甲F1表现为紫花F自交F2表现为紫花白花＝97 实验2白乙×白丙F表现为紫花F自交F2表现为紫花白花＝97 若要鉴定F2白花植株的基因型请你设计杂交实验方案实验条件满足要求让该植株分别与亲本白乙白丙杂交． 结果及结论①若则该白花植株的基因型是aaB_或A_bb ②若则该白花植株的基因型是aabb．
TheSecretstoHappiness Wealwayswanttoearnmoremoney.Nomatterhowmuchweearnitwon'tmakeushappier.36.Sowhatwillbringushappiness?Theansweris4things.These4thingshavebeenprovenbyresearch﹣surveysofmanypeopleaboutwhattheyhaveandhowhappytheyare.Heretheyare 1.Goodrelationships.37Havingsupportivefriendshipsastrongmarriageandlovingrelationshipswithourfamilieswillmakeusmuchmorelikelytobehappy.Sospendtimewithyourlovedonestellingthemwhattheymeantoyoulisteningtothemanddevelopingyourrelationshipwiththem. 2.Positivethinking.Positivethinkingisthebestwaytoachieveyourgoalsbutitturnsoutthatitcanleadtohappinesstoo.Optimismandself﹣esteemaresomeofthebestindicatorsofpeoplewholeadhappylives.38Makepositivethinkingahabitandreplaceallnegativethoughtswithpositiveones. 3.Flow.ThisisapopularconceptontheInternetthesedays﹣thestateweenterwhenwearecompletelyfocusedontheworkortasks.Wearesoimmersedinourtasksthatwelosetrackoftime.Havingworkandleisurethatgetsyouinthisstateofflowwillalmostundoubtedlyleadtohappiness.39Findworkandhobbiesthatyou'repassionateabout. 4.Generosity.Beinggenerousmeanstakingactiontowardothersandbeingsensitivetoothers'needsandwants. 40Yetgenerositydoesn'tjustbenefittherecipientofourofferings.Itnaturallyreducesstressandcombatsdepressionwhileenhancingoursenseofhappiness.Itcanevenlengthenourlifespan. A.Happinessdependsonpeople'sdifferentattitudestolife. B.Itinvolvesushelpingothersinwaysmatextendbeyondourselves. C.Wehaveahumanneedtobecloseandintimatewillotherhumanbeings. D.Thereisnogreaterhappinessthanthatofsucceedinginone'seducation. E.Insteaditcantakeusdecadesofpursuingwealth. F.Peoplefindgreatestenjoymentwhenthey'reabsorbedinamindfulchallenge. G.Happypeoplefeelempoweredincontroloftheirlivesandhaveapositiveoutlookonlife.
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
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
高一上学期物理
教案备课库
教案备课库
湘公网安备 43130202000226号