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聚合物H （）是一种聚酰胺纤维，广泛用于各种刹车片，其合成路线如下： 已知：①C、D、G均为芳香族化合物，分子中均只含两种不同化学环境的氢原子． ②Diels﹣Alder反应：． （1）生成...
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高三下学期化学《》真题及答案
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目前国内外大量开发的合成纤维主要有
聚酰胺纤维
聚苯乙烯
聚酯纤维
聚氯乙烯
下列不是合成纤维
聚酯纤维
聚酰胺纤维
聚丙烯纤维
粘胶纤维
某种细菌可以利用乙酰辅酶A作为底物在一种酶的作用下合成一种十分重要的聚合物拟通过高等植物基因工程大量
卡普隆又称尼龙6是聚酰胺纤维之一种它的单体是己内酰胺和
环己醇
氨基乙酸
对苯二甲酸二甲酯
萘
世界最早上市的合成纤维是
聚乙烯、醇纤维（晴伦）
聚酯纤维（的确良）
聚酰胺纤维（锦伦）
聚丙烯纤维（丙伦）
聚合物大致可分成聚合物和天然聚合物
两性
阳离子
人工合成
阴离子
可动凝胶是一种离子键胶其性质与水解度溶液pH值等因素关系密切
聚合物用量
聚合物相对分子质量
聚合物浓度
聚合物粘度
在油田聚合物驱油工程中常用的人工合成聚合物是
纤维素
黄原胶
聚丙烯酰胺
磷酸酯铝盐
某种细菌可以利用乙酰辅酶A作为底物在一种酶的作用下合成一种十分重要的聚合物拟通过高等植物基因工程大量
目前国内外大量发展的合成纤维主要有
聚酰胺纤维
聚酯纤维
聚丙烯腈纤维
聚氨酯纤维
聚酰胺-66尼龙-66常用于生产帐篷渔网弹力丝袜等织物可以利用以下路线来合成已知1A.与E.互为同分
聚酰胺纤维俗称尼龙也叫锦纶
HEDP为阻垢剂
合成聚合物
磷酸盐
磷酸脂
合成聚合物
油田上凡是聚合物驱的采出注入井在井号前都冠以P字是因为常用的聚合物是由丙烯酰胺聚合而成的其英文缩写为
天然
人工合成
高分子
低分子
哪项不是高分子聚合物常用来制造的
合成纤维
合成橡胶
天然树脂
合成树脂
一种聚合物材料以何种形式降解主要取决于这种聚合物的和水在这种聚合物内部的
下列几种聚合物的水解速度顺序正确的是
聚酸酐>聚酯>聚酰胺>聚烃
聚酯>聚酸酐>聚酰胺>聚烃
聚酰胺>聚酯>聚酸酐>聚烃
聚酸酐>聚酰胺>聚酯>聚烃
聚合物是由一种或几种简单的而成
化合物聚合反应
化合物加成反应
天然树脂聚合反应
合成树脂聚合反应
驱油用聚合物大致分为两类
阳离子聚合物和阴离子聚合物
水解聚合物和非水解聚合物
水溶性聚合物和非水溶性聚合物
天然聚合物和人工合成聚合物
有合成羊毛之称被广泛用来代替羊毛的地毯是
聚酯纤维地毯
聚酰胺纤维地毯
聚丙烯纤维地毯
聚丙烯腈纤维地毯
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已知函数fx＝x+1将fx的图象上的所有点的横坐标缩短到原来的纵坐标保持不变再把所得图象向上平移1个单位长度得到函数y＝gx的图象若gx1•gx2＝9则|x1﹣x2|的值可能为
函数fx＝cos2x+αsinx﹣cosx在区间上单调递增则实数α的取值范围是．
某个几何体的三视图如图所示在该几何体的各个侧面中面积最大的侧面的面积为
已知函数fx＝x3﹣2ex2+mx﹣lnx若fx＞x恒成立则实数m的取值范围是
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. InthesummerholidaywetravelledtoQingdaoandpaidvisittomyunclethere.It'salongandboredjourney.ButthemomentIarrivedIfallinlovewiththecity.It'ssuchbeautifulacitythatIcanhardlyfindanywordtodescribeit.Thestreetsarecleaningandtheskyisblue.Ifyouwalkalongthecoastyoucanfeelthewindtoblowingonyourface.Theseaisvastandsometimesyoucanfindaboatoraship.Youmayalsodosomefishingasfarasitispermitted.MoreoverIthinkthedrivertheredrivetoofastinthestreet.Youcanneverbetoocarefullywhencrossingthestreet.
已知数列{an}是公比为2的等比数列且a2a3+1a4成等差数列． 1求数列{an}的通项公式 2记bn＝an+log2an+1求数列{bn}的前n项和Tn．
已知函数fx＝ax3+bsin2x+2ab∈Rab≠0且f2＝3则f﹣2＝．
若a＞b＞10＜c＜1则
若直线mx+ny+2＝0m＞0n＞0截得圆x+32+y+12＝1的弦长为2则的最小值为
△ABC中已知a＝2b＝xB＝60°如果△ABC有两组解则x的取值范围
命题“∃x∈R+lnx＞0”的否定是
已知集合M＝{xy|x+y＝1}N＝[xy|x﹣y＝1}则M∩N等于
Noonelikestofail.Whetherit'satworkathomeorinanotherareaofyourlifefailureispainfulanditcanalsobecostlyintermsoftimemoneyorboth.1Ifyouneversufferafailurethenyou'reprobablynotpushingyourselftoyourfullpotential.Thefollowingaresometipsonhowtopickyourselfupafteryou'vefailed. Rememberthatotherpeoplefailtoo.2They'lltellyouaboutthatgreatnewcontract合同theysignednotthedealthatfailedeventuallythoughtheyworkedonitformonths.Butfailureisnormalandlotsofpeoplefailtimeandtimeagainbeforemeetingwithsuccess. Remindyourselfofyourpastsuccesses.Failingdoesn'tmeanthatyou'reworthlessorthatyou'llneverachievethethingsyouwant.3Maybeyouhadhighmarkslasttermoryoulostweightoryoulearnedtoplayamusicalinstrument.Youmightwanttowritedownalistofsuccesses﹣﹣﹣thingsthatyou'veaccomplishedoverthepastfewyearswhetherbigorsmall.Ifyoueverlackconfidenceyoucangobackandreadoverthatlist. 4Yourpastsuccessesareimportantbutsoareyourpastfailures.You'vemademistakesbeforeandyou'vesurvivedthem.Perhapsyoudidbadlyinanexamorlostyourtemperandhadtoapologize.It'snotfuntothinkaboutthetimeswhenthingswentwrongbutbyacknowledgingyourfailuresyoucanremindyourselfthattodayisnodifferent.Justasyourecoveredinthepastyoucanrecoverfromyourrecentfailuretoo. 5Whatevergoeswrongyou'reprobablyfacingsomesortofdecision.Don'trushintomakingahastydecisionbutdolookforaforwardpath.Thatmightrequiresomedeepthinking. A.Makeadecision. B.Limitthedamagecaused. C.Remindyourselfofyourpastfailures. D.Howeverfailureisanormalpartoflife. E.Getsomeadviceandsupportfromothers. F.Mostpeopledon'ttalkopenlyabouttheirfailures. G.Thinkofallthetimesinthepastwhenyou'vesucceeded.
有一组实验数据如表所示 x 2.01 3 4.01 5.1 6.12 y 3 8.01 15 23.8 36.04 则最能体现这组数据关系的函数模型是
已知双曲线C＝1a＞0b＞0的两条渐近线均与圆x2+y2﹣6y+5＝0相切则双曲线C的离心率为
某人从2008年起每年1月1日到银行新存入a元一年定期若年利率为r保持不变且每年到期存款和利息自动转为新的一年定期到2018年底将所有存款及利息全部取回则可取回的钱数元为
已知等差数列{an}的前n项和为Sn且a3＝2a6＝8则S8＝
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在平面直角坐标系xOy中已知二次函数fx＝x2+bx+c与x轴交于A﹣10B20两点则关于x的不等式x2+bx+c＜4的解集是．
已知点在椭圆C＝1a＞b＞0上O为坐标原点直线l＝1的斜率与直线OA的斜率乘积为﹣．Ⅰ求椭圆C的方程Ⅱ不经过点A的直线ly＝x+tt≠0且t∈R与椭圆C交于PQ两点P关于原点的对称点为R与点A不重合直线AQAR与y轴分别交于两点MN求证AM＝AN．
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已知复数z满足z1+i2＝2﹣ii为虚数单位则|z|为
在数列{an}中a1＝1an+1＝设bn＝n∈N* Ⅰ求证数列{bn}是等差数列并求通项公式bn Ⅱ设cn＝bn•2n﹣1且数列{cn}的前n项和Sn若λ∈R求使Sn﹣1≤λcn恒成立的λ的取值范围．
假设你是高中学生李华.你市戏剧院响应国家在校园促进传统戏曲文化的号召将在12月20日表演传统京剧霸王别姬学生可免费观看.你的朋友Tom对京剧很感兴趣因此你想邀请他来观看表演.请你给他写封信内容包括: 1.表演时间地点; 2.表演内容; 3.计划与期望. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯. 3.开头和结尾已为你写好. 4.参考词汇霸王别姬FarewellMyConcubine市戏剧院thecitytheatre DearTom Yours LiHua
如果函数fx＝满足对任意的x1≠x2都有＞0成立那么实数a的取值范围是．
Teachers'Dayisinterestinglynotcelebratedonthesamedayallovertheworld.Insomecountriesitismarkedbyaholidayinothersitisaworkingday. InternationalTeachers'DayiscelebratedonOctober5.Beingheldeversince1994itisinhonorofteachers'organizationsworldwide.Itsaimistoencouragesupportsforteachersandtomeettheneedsofstudents. China﹣In1939Teachers'DaywassetforAugust27Confucius'birthday.In1951thecelebrationwasstopped.Howeveritwasfoundedagainin1985andthedaywaschangedtoSeptember10. India﹣Teachers'DayiscelebratedonSeptember5inhonourofDr.SarvepalliRadhakrishnanthesecondpresidentofIndiawhosebirthdayfallsonthatday. Russia﹣InRussiaTeachers'DaywascelebratedonthefirstSundayofOctoberbetween1965and1994.Since1994thedayisobservedontheOctober5justthesamedayasWorldTeachersDay. TheUS﹣IntheUSTeachers'Dayisnon﹣officialholiday.ItiscelebratedontheTuesdayofthefirstfullweekofMay.Anumberofactivitiesareorganizedinschoolstohonorteachers.ThecelebrationscancontinueforthewholeweekofMay. Thailand﹣InThailandNationalTeachers'DayiscelebratedeveryyearonJanuary16.ThefirstTeachers'Daywasheldin1957.Thedayisaholidayinschools. 1Whichofthefollowinghasthesamemeaningastheunderlinedwordobserved? A.stopped B.held C.celebrated D.fell 2Whichofthefollowingispossiblytrue? A.ChinahascelebratedTeachers'Daysincetheyear1931. B.DrSarvepalliRadhakrishnan'sbirthdayisinSeptember C.Teachers'DayisanofficialholidayintheUnitedStates. D.Teachers'DayisaworkingdayinschoolsofThailand. 3Fromthepassagewecanlearnthat. A.ThefirstTeachers'Daywasheldin1965inThailand B.Teachers'DayfallsonConfucius'birthdayinChina C.InternationalTeachers'Dayaimstobenefitthestudents D.AlotofactivitiesareheldonTeachers'Dayacrosstheworld
Thewinterafter9.11wasreallyadifficultoneforme.Ihadjust1thejobinGreenvilleSouthCarolinaandstartedmylong﹣termunemploymentandatmidlifemanyendless2days.Ifeltemptyinside.Onethingthatmademe3washavingmygrandchildrenSophieandSimeonwithmeforHanukkah光明节butwhenthey4totheirhomeIwasleftwithadarkstateofmindandthatinner5again. ItwasthenthatmywifeLindadirectoroftheupstateHomelessCoalition6thatIpretendtobeSantafor30childreninaholiday7atalocalhall.AsshedescribedtomehowmeaningfulitwouldbeIlookedatmyselfinthemirror8thatIhadafullalmostwhitebeardjustlikeSanta's. CanI9Santa?Imustadmitthatyearmyheartwasn'tinit.Theshowmust10.Lindainsisted.Well11thatIhadnothingtodothenIbeganto12myvoiceandactioninordertobelikearealSanta. Iwasnotpreparedforthe30setsofeyesthat13mewhenIwalkedin.Santa!Santa!Lookatmynewshoes!Santa!I'vebeenacutegirl.Santa!Canwe14JingleBellstogether? Theycircledaroundmehuggedand15me.EachchildsatinmylapandposedforaphotoandIgavethemall16﹣ateddybearadollapaint﹣by﹣the﹣numberskitandmanyotherthings. Their17andexcitedvoicesbroughttearstomyeyes.Ifeltawaveof18.Thesechildrenweremostvaluablegiftstoacoldworld.These19childrenliftedmefromself﹣doubtandhopelessness.AtthatsweetmomentIlostmymindandregainedmy20. 1A.employed B.left C.found D.created 2A.special B.ordinary C.depressing D.interesting 3A.happy B.amazed C.surprised D.worried 4A.referred B.turned C.applied D.returned 5A.peace B.emptiness C.doubt D.pity 6A.promised B.agreed C.suggested D.believed 7A.training B.plan C.movie D.program 8A.discovering B.hoping C.wishing D.imagining 9A.regardas B.serveas C.viewas D.actas 10A.takeoff B.goon C.breakdown D.speedup 11A.guessing B.remembering C.considering D.supposing 12A.practice B.examine C.change D.observe 13A.leftbehind B.focusedon C.tookin D.pointedat 14A.play B.write C.sing D.strike 15A.kissed B.comforted C.encouraged D.inspired 16A.presents B.chances C.smiles D.signs 17A.anger B.anxiety C.breath D.delight 18A.concern B.warmth C.regret D.sadness 19A.homeless B.clever C.disabled D.healthy 20A.friendship B.strength C.freedom D.hope
在平面直角坐标系xOy中直线l的参数方程为t为参数α为l的倾斜角以原点O为极点x轴正半轴为极轴建立极坐标系曲线E的极坐标方程为ρ＝4sinθ直线θ＝βθ＝β+θ＝β﹣ρ∈R与曲线E分别交于不同于极点O的三点ABC． Ⅰ若求证|OB|+|OC|＝|OA| Ⅱ当β＝时直线l过BC两点求γ0与α的值．
郑州地铁项目正在如火如荼地进行中全部通车后将给市民带来很大的便利．已知地铁5号线通车后列车的发车时间间隔t单位分钟满足2≤t≤20经市场调研测算地铁的载客量与发车的时间间隔t相关当10≤t≤20时地铁为满载状态载客量为500人当2≤t＜10时载量会减少减少的人数与10﹣t2成正比且发车时问间隔为2分钟时的载客量为372人记地铁的载客量为st． 1求st的表达式并求发车时间间隔为5分钟时列车的载客量2若该线路每分钟的净收益为Q＝元．问当列车发车时问间隔为多少时该线路每分钟的净收益最大
已知abc分别是△ABC内角ABC的对边且满足b﹣c2＝a2﹣bc． 1求角A的大小 2若a＝6sinC＝2sinB求△ABC的面积．
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