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化合物W（）、M（ ）、N（）的分子式均为C7H8．下列说法 正确的是（ ）
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高三下学期化学《》真题及答案
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某化合物分子式为C4H8O2M=88质谱图上出现 m/z60的基峰则该化合物最大可能为 ______
某一化合物分子离子峰区相对丰度为M:M+2:M+4=9:6:1则该化合物分子式中含氯离子数为①
化合物A和B的分子式均为C4H8都无顺反异构A能使Br2褪色但与KMnO4/H+无反应B能使Br2和
一种化合物的分子式为C4H8O写出与下面质谱峰相对应的离子和化合物的结构式m/z72 为__m/z4
分子式是C2H6O的化合物在NMR谱上出现单峰该化合物是①
某化合物经MC检测出分子离子峰的m/z为67从分子离子峰的质荷比可 以判断分子式可能为
C4H3O
C5H7
C4H5N
C3H3N2
下列是三种化合物的结构式及分子式则按其规律第4个化合物的分子式为.
某元素的气态氢化物的分子式表示为H2X求出X的最高价氧化物的水化合物的分子式
写出分子式为C7H8O的芳香族化合物的同分异构体
某化合物的相对分子质量为72红外光谱指出该化合物含羰基则 该化合物可能的分子式为
C3H6NO
C3H4O2
C4H80
(A)或（B)
下列是三种化合物的结构式及分子式结构式分子式1请按其规律写出后一种化合物的分子式.2每一种化合物的分
某元素的气态氢化物的分子式表示为H2X求出X的最高价氧化物的水化合物的分子式
0.1mol分子式为CmHn的有机化合物在氧气中完全燃烧生成CO2和H2O的物质的量相等并消耗标准况
下列化合物中同分异构体数目不考虑立体异构最少的是
分子式为C.5 Hi2的经
分子式为
4 H10 0的醇 C.分子式为C.4 H>的烯烃
分子式为C.3 H" 02的酯
下列是三种化合物的结构式及分子式请按规律写出后一种化合物的分子式
化合物W.X.Y.Z.的分子式均为C7H8Z.的空间结构类似于篮子下列说法正确的是
化合物W.的同分异构体只有X.、Y.、Z.
X、Y.、均可与酸性KMnO
4
溶液反应
1molX.、1mol Y 与足量Br
2
/CCl
4
溶液反应最多消耗Br
2
均为2mol
Z的一氧代物只有3 种
下列是三种化合物的结构式及分子式请按其规律写出第n个化合物的分子式.
分子式为HmROn的化合物中元素R的化合价是多少用mn表示
分子式为C7H8O的芳香族化合物不可能是
醇
酚
醚
醛
某化合物的分子式为C8H7N试根据其红外光谱图推测其结构
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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．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．ItwasattheGreenStorethatIfindabrokenrockingchairandputitinbackofmytruck．Theseatwassplitintotwofromfronttoback．Otherthanthatitwasinexcellentlycondition．IthoughtIshouldrepairitsothatbythefollowingdayitwouldbesogoodasanewone．BySundayafternoonthegluehadsetandaftertwocoatofbrightwhitepaintthechairwasofperfect．IwasexcitingbecauseIwasgoingtosurprisemywife．Wewerenewparenttoabeautifulbabyboy．Ournewbabylovedtoberockedbutwedidn5thaveaproperrockingchair．Thischairwasbeautifulandhiswifewasveryhappywithit．
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ThereisarestaurantinmyMainetownthathasdonelittletoupdateitselfoverthepast80years．Thisispartofitscharmasisthewoodenphonebooththatsitsneglectedintheageofthecellphone．Ahthephonebooth．Weneeditnowmorethanever． Formeitsymbolizesthatphonecallswereonceprivateaffairseveniftheinformationbeingsharedwasnotsensitiveinanyway．Itwassimplyassumedthataphonecenversationwasmeantfortwopeopleandtwopeopleonly． Growingupinthe1960swehadonlyphoneinthehouse．AsakidIdidn'tgetormakemanycallsbecauseallmyfriendsfivewithinearshotandIcouldjustyelloutthewindowifIwantedtheirattention．IdohoweverrememberansweringthephoneaskingfortheidentityofthecallerandthenhandingthephonetomymomShe'dtakeitsayHelloMrs…onemomentpleaseandthenassheplacedherhandoverthereceiversheturnedtomeanddirectedThisisforme．Whydon'tyougooutsideandplay Flashforwardtowhatcellphoneshavedonetoourlife．Withinthespaceofafewyearsoverhearingprivateconversationsseemstobenormal．NotlongagoIwassittinginBoston'sSouthStationnearamanwhowasonhiscellphonewaitingformytrain． ThefollowingiswhatthemanhadtosayYesthat'sright．Theredandyellowroses．Thenhecontinuedtorecitehiscardnumberaridexpirationdate有效期．Istaredatthefellow．HeglancedatmeandaskedWhatMyresponsewasimmediateIrecitedhiscardnumberbacktohimalongwiththeexpirationdate． Thereisnolongerasenseofpersonalbordersorlimits．Thecellphonehasbecomeamegaphone扩音器andIhavebeenprivy私下知情todetailsofpeople'slivesthatIwouldrathernotknow．Maybephoneboothscouldserveascellphoneharborstoday． 1WhatfeaturedoestherestaurantinMainetownhave A．Itisverypopular B．Itisold﹣fashioned C．Itwillclosedown D．Ithasbeenneglected 2Asakidtheauthor A．hadafewfriends B．oftencalledhisfriends C．wasnotallowedtoanswerthephone D．learnedthatphoneconversationsareprivate 3Whatistheauthor'sattitudetowardscellphone A．Critical B．Tolerate C．Optimistic D．Approving 4WhatdidtheauthordoinBoston'sSouthStation A．Hetalkedtoanoldfriend． B．Heboughtsomecolorfulroses． C．Heoverheardaman'spersonalinformation． D．Hehelpedastrangerwhowasmakingacall．
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TheearthhaschangedoverandoveragainthroughoutthecourseofitshistoryInordertosurviveinchangingenvironmentsspeciesmustoftengothroughaprocessofadaptation．Adaptationreferstogeneticchangethatenablesanorganism生物体suchasananimalorplanttosurviveinitsenvironment．Iftheorganismsofaspeciescannotchangealongwiththeareainwhichtheylivetheyriskdyingout．Recenthistoryhasgivenusanimportantexampleofhoworganismsareabletosurviveoncetheirenvironmentschange． Lightgraypepperedmoths胡椒蛾anddark﹣coloredpepperedmothslivedinthecountrysidebetweenthecitiesofManchesterandLondoninEnglandManyyearsbeforethe19thcenturymoreofthelightgraypepperedmothshadbeenabletosurviveintheirenvironmentmostlybecauseoftheircolor．Birdscouldn'tseethelight﹣coloredmothsonthetreesbecausethecolorofthemothswassimilartothecolorofthetrees． Intheearly19thcenturythoughEnglandbeganthefirstyearsofitsIndustrialRevolution．Manyareasbecameoccupiedbyagrowingnumberoffactories．Manyofthesefactoriesneededcoaltoprovideenergyfortheirmachines．Whencoalbumsitgivesoffalotofdark﹣coloredsmokes．Thetreesbegantoblackenbecauseofallthesmokeintheairfromthefactories．Thismadethelightgraypepperedmothsmuchmorevulnerable．Birdscouldseethemonthetreesmoredearlyandeasilyhuntthemdown． SometimeinthenexthundredyearsscientistsbegantonoticeahugechangeinthemothpopulationlivinginandbetweenthecitiesofManchesterandLondon．Mostofthepepperedmothswereofthedark﹣coloredkind!Whatcausedthischangewasthefactthatbirdshadeatenalotofthelightgraypepperedmothsbecausethemothscouldbeseenclearlyonthedarkenedtrees．Thedark﹣coloredpepperedmothsintheareasurvivedmuchmoreeasilyandmatedwithotherdark﹣coloredpepperedmothsuntilmostofthepopulationofpepperedmothsbecamedark﹣colored． 32．Ifaspeciescan'tadapttothechangingenvironmenttheyarelikelyto． A．bedrivenoutoftheirhabitat． B．becomeextinct C．movetoanotherenvironment D．gothroughgeneticchanges 33．Whatconclusioncanbedrawnfromthechangeintwokindsofmoths A．Therewerepreviouslynodark﹣coloredpepperedmoths． B．Thelight﹣coloredpepperedmothsmovedtoanewenvironment． C．Thecolorchangehadnothingtodowiththechangeintheirenvironment． D．Darkcoloringwasbetterforthepepperedmothssurvivalinthe19thcentury． 34．Whatdoestheunderlinedwordvulnerableprobablymean A．Quicktochange B．Opentoattack C．Easilydefended D．Inastrongposition 35．Whatdoestheauthormainlydescribeinthepassage A．HowtheIndustrialRevolutionimprovedthelivesofworkers． B．Howtheearthchangedthroughoutthecourseofitshistory． C．Howhumaninfluenceorganismsthroughartificialselection． D．Hownaturalselectionchangedthepopulationofpepperedmoths．
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