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变压吸附法的原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离．在吸附塔中，通过加压与减压的交替循环，可以使分子筛重复使用．部分过程的示意图如图： 下列说法不正确的是（ ）
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硫磺回收主要方法有气相氧化法液相氧化法分子筛吸附法
变压吸附法的原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离．在吸附塔中通过加压与减压的交替
分子筛净化空气的方法称为
吸附法
冻结法
反应法
过滤法
工业上可以用变压吸附法制取氧气原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离在吸附塔中通过增
大孔吸附树脂柱色谱的分离原理是
分子筛
反相分配
氢键吸附
分子筛和选择性吸附
离子交换
变压吸附法的原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离．在吸附塔中通过加压与减压的交替
变压吸附法的原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离．在吸附塔中通过加压与减压的交替
变压吸附法的原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离．在吸附塔中通过加压与减压的交替
聚酰胺柱色谱的分离原理为
氢键吸附原理
分子筛原理
分子筛和吸附原理
反相分配色谱原理
离子交换原理
烟气脱硝的方法从化工过程的角度有
催化还原法
吸收法
固体吸附法
固体吸附法包括分子筛吸附和泥煤一碱法等
催化氧化法
碳分子筛空分制氮机是运用原理制取氮气的
固体吸附
变压吸附
预热分离
化学分离
变压吸附法的原理是利用分子筛吸附氮气和氧气能力的差异将二者进行分离．在吸附塔中通过加压与减压的交替循
真空变压吸附空分装置的产氧原理是用分子筛有选择地吸附掉原料空气中的水分氮气和二氧化碳等气体所以分子筛
分子筛用甲烷或氮气再生是因为
高温的极性分子，易被分子筛吸附
高温的非极性分子，易被分子筛吸附
可降低水汽在分子筛固体表面上的分压
氮气和甲烷分子直径比水大
大孔树脂法的分离原理是
极性吸附
分子筛
氢键吸附
解离度
吸附和分子筛
大孔吸附树脂柱色谱的分离原理为
氢键吸附原理
分子筛原理
分子筛和吸附原理
反相分配色谱原
离子交换原理
聚酰胺柱色谱的分离原理为
氢键吸附原理
分子筛原理
分子筛和吸附原理
反相分配色谱原
离子交换原理
以下说法正确的是
分子筛是一类能筛分分子的物质
碳分子筛具有微孔,孔径分布在0.3~1mm之间
气调杀虫应维持氮气浓度98%不少于28d
变压吸附法通常使用两个吸附塔并联
分子筛吸附法有何特点
大孔吸附树脂柱色谱的分离原理为
氢键吸附原理
分子筛原理
分子筛和吸附原理
反相分配色谱原理
离子交换原理
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在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C1．以坐标原点为极点x轴正半轴为极轴建立极坐标系曲线C2的极坐标方程为ρ＝． Ⅰ若直线l与xy轴的交点分别为AB点P在C1上求•的取值范围 Ⅱ若直线l与C2交于MN两点点Q的直角坐标为﹣21求||QM|﹣|QN||的值．
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已知Sn为等比数列{an}的前n项和Sn＝2an﹣1． 1求an 2设b＝an+n求数列{bn}的前n项的和Tn．
在△ABC中若点D满足＝2点M为AC中点则＝
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已知tanα＝﹣2其中α为三角形内角则cosα＝
已知双曲线a＞0b＞0的一条渐近线经过点2则该双曲线的离心率为
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己知a＞0函数fx＝|x﹣a|． 1若a＝2解不等式fx+fx+3≤5 2若函数gx＝fx﹣fx+2a且存在x0∈R使得成立求实数a的取值范围．
曲线fx＝lnx﹣ax在点efe处的切线与直线ex+2y+3＝0垂直则实数a的值为
30分 TheCoffeePlace Iusedtobelievepolitenesswasathingofthepast.VeryseldomhadImeta1humanbeinginthismodemageoftheso﹣calledCenerationX. RecentlyIhadtochangemy2whenIcamefacetofacewithjustsuchahumanbeing.Ihadgonetoacoffeeplacewithtwoofmygrown﹣updaughters.Theplacewascrowdedwiththeusualloudcrowdandwehadtoclimbthestairsinordertofindan3table.Afterenjoyingcoffeeandsnacksweweregoingdownthestairswherethe4spacemadeclimbingdownonlypossibleinasingle5withhardlyanyspaceforanotherpersontoeitherclimbupor6. JustasIwasinthe7ofmygoingdownagentlemanenteredbythemain8ofthecoffeeplacewhichwasinfrontofthestaircase.IwassureIwouldbepushed9bythemanwhowouldwanttogoup10.IkeptcomingdownasfastasIcould11ontothebannister扶手.MydaughterswerealreadydownlookingupatmeandhopingIwouldreachthembeforethe12startedupthestairs. NearlyreachingthemInoticedthemanstillstandingnearthe13.Ireachedmydaughtersandpassedhimattheentrancedoorhe14holdingopen.Ilookedbackthinkinghewasstilltheretryingto15whethertogoinorfindanotherlesscrowdedplace.ButlaterIsawhimgoingupthestairstwoatatime.Itoldmydaughtersaboutitandfeltbadthatwedidn'teventhankhimwhowasactuallyholdingthedooropenforustopassthrough16goingup. We17histhoughtfulness.Such18peoplearehardtofindthesedayswhenpushingroughlyisvery19inouradvancedbutaggressivesociety.TilldateIrememberthisgentlemanand20toGodtomakemorehumanbeingslikehim. 1A.polite B.rude C.clever D.dull 2A.choice B.thinking C.life D.decision 3A.convenient B.nice C.reserved D.empty 4A.wide B.open C.narrow D.large 5A.area B.circle C.second D.line 6A.breakdown B.setdown C.comedown D.takedown 7A.end B.way C.middle D.aim 8A.entrance B.room C.hall D.exit 9A.gently B.roughly C.casually D.politely 10A.carefully B.happily C.slowly D.hurriedly 11A.holding B.going C.depending D.handling 12A.waiter B.student C.friend D.stranger 13A.table B.door C.window D.counter 14A.stopped B.permitted C.kept D.considered 15A.decide B.inform C.persuade D.discuss 16A.after B.when C.before D.since 17A.required B.applauded C.thanked D.spread 18A.well﹣mannered B.deeply﹣affected C.ill﹣educated D.easily﹣identified 19A.general B.urgent C.serious D.common 20A.point B.pray C.devote D.explain
在轴截面顶角为直角的圆锥内作一内接圆柱若圆柱的表面积等于圆锥的侧面积则圆锥的底面半径与圆柱的底面半径之比为
如图菱形ABCD的对角线AC与BD相交于点OFO⊥平面ABCD四边形OAEF为平行四边形． Ⅰ求证平面DEF⊥平面BDF Ⅱ若AB＝FO＝BD＝2点H在线段BF上且＝λ三棱锥B﹣AHC的体积等于三棱锥O﹣DEF的体积求λ的值．
若a＜b＜0则以下选项中不正确的是
＝
半径为2的球的内接三棱锥P﹣ABCPA＝PB＝PC＝2AB＝AC＝BC则三棱锥的高为
已知抛物线y2＝﹣2pxp＞0的焦点为Fx轴上方的点M﹣2m在抛物线上且|MF|＝直线l与抛物线交于AB两点点AB与M不重合设直线MAMB的斜率分别为k1k2．Ⅰ求抛物线的方程Ⅱ当k1+k2＝﹣2时求证直线l恒过定点并求出该定点的坐标．
在三棱锥D﹣ABC中AB＝AC＝AD＝BC＝BD＝CD＝2则三棱锥D﹣ABC外接球的表面积为．
函数fx的图象如图所示则函数fx的解析式可能为
已知i为虚数单位复数z满足z1﹣i＝2+i则在复平面内的对应的点在
△ABC的内角ABC的对边分别为abc已知a+2ccosB+bcosA＝0则B＝
已知函数若在区间1+∞上函数fx的图象恒在直线y＝2ax的图象的下方则实数a的取值范围是．
如图网格纸上小正方形的边长为1粗实线画出的是某集合体的三视图则该几何体的体积为
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