【单选题】Thegoodswhenwearrivedattheairport.()
A.werejustunloading
B.werejustbeingunloaded
C.hadjustunloaded
D.werejustbeenunloaded
A.werejustunloading
B.werejustbeingunloaded
C.hadjustunloaded
D.werejustbeenunloaded
【分析解答题】设A是3阶矩阵,b1,b2,b3是线性无关的3维向量组,已知Ab1=b1 b2, Ab2=-b1 2b2-b3, Ab3=b2-3b3, 求 A
【单选题】如果王晶是学生会成员,她一定是二年级学生。
上述判断是基于以下哪个前提作出的?()
A.只有王晶才能被选入学生会。
B.只有二年级学生才有资格被选入学生会。
C.入选学生会成员中必须有二年级学生。
D.二年级学生也可能不被选入学生会。
E.王晶没有拒绝加入学生会。
上述判断是基于以下哪个前提作出的?()
A.只有王晶才能被选入学生会。
B.只有二年级学生才有资格被选入学生会。
C.入选学生会成员中必须有二年级学生。
D.二年级学生也可能不被选入学生会。
E.王晶没有拒绝加入学生会。
【单选题】某单位为了提高干部的业务素质和管理能力,实现管理的现代化、科学化,决定举办计算机应用知识培训班,号召干部们积极参加培训。小张约小李一道去报名参加培训,小李回答说:“我又不是从事计算机专业工作的,有什么必要一定要去参加计算机知识培训,我的工作业绩和管理能力是有目共睹的。”
上文中小李的回答包含了什么错误前提?()
A.人们学习计算机应用知识是没有必要的。
B.计算机的普及是相当遥远的事。
C.计算机知识的学习应当在学生中进行。
D.计算机不可能代替人脑的思维。
E.只有从事计算机专业工作的,才应该学习和掌握计算机知识。
上文中小李的回答包含了什么错误前提?()
A.人们学习计算机应用知识是没有必要的。
B.计算机的普及是相当遥远的事。
C.计算机知识的学习应当在学生中进行。
D.计算机不可能代替人脑的思维。
E.只有从事计算机专业工作的,才应该学习和掌握计算机知识。
【单选题】gloBAl EnErgy DEmAnD is ExpECtED to triplE By miD-CEntury. thE EArth is unlikEly to run out oF Fossil FuEls By thEn, givEn its vAst rEsErvEs oF CoAl, But it sEEms unthinkABlE thAt wE will ContinuE to usE thEm As wE Do now. it’s not just A quEstion oF supply AnD priCE, or EvEn oF thE DisEAsE CAusED By Filthy Air. thE tErrorist AssAult on thE worlD trADECEntEr rAisEs othEr sCAry sCEnArios: how muCh EAsiEr woulD it BE to CrACk opEn thE trAns-AlAskA pipElinE AnD how muCh DEADliEr woulD it BE to BomB A nuClEAr plAnt thAn to AttACk A winD Arm
skEptiCs mAy rECAll thE Burst oF EnthusiAsm For ConsErvAtion AnD rEnEwABlE powEr whEn oil priCEs quADruplED in thE 1970s. stAtE-FunDED EnErgy rEsEArCh AnD DEvElopmEnt surgED, whilE tAx inCEntivEs BoostED solAr, winD AnD othEr AltErnAtivEs to pEtrolEum AnD thE Atom.But whEn oil suppliEs loosEnED AnD priCEs DroppED in thE EArly 1990s, govErnmEnts lost intErEst. in thE stAtE oFCAliForniA, suBsiDiEs EvAporAtED, pushing winD CompAniEs into BAnkruptCy.
ClEAn EnErgy hAs long wAy to go. only 2.2% oF thE worlD’s EnErgy ComEs From "nEw" rEnEwABlEs suCh As smAll hyDroElECtriC DAms, winD, solAr AnD gEothErmAl. how to Boost thAt shArE--AnD At whAt pACE--is DEBAtED in inDustriAlizED nAtions--From jApAn, whiCh imports 99.7 % oF its oil, to gErmAny, whErE thE nEArByChErnoByl ACCiDEnt turnED thE puBliC AgAinst nuClEAr plAnts, to thE u.s., whErE thEBushADministrAtion hAs strong tiEs to thE oil inDustry.But thE momEntum towArD ClEAn rEnEwABlEs is unDEniABlE. how soon wE rEACh An ErA oF ClEAn, inExhAustiBlE EnErgy DEpEnDs on tEChnology. solAr AnD winD EnErgiEs ArE intErmittEnt: whEn thE sky is ClouDy or thE BrEEzE DiEs Down, Fossil FuEl or nuClEAr plAnts must kiCk into CompEnsAtE.But sCiEntists ArE working on BEttEr wAys to storE ElECtriCity From rEnEwABlE sourCEs.
whilE DEvElopED nAtions DEBAtE how to FuEl thEir powEr plAnts, howEvEr, somE 1.6 Billion pEoplE--A quArtEr oF thE gloBE’s populAtion--hAvE no ACCEss to ElECtriCity or gAsolinE. mAny spEnD thEir DAys CollECting FirEwooD AnD Cow Dung, Burning it in primitivE stovEs thAt BElCh smokE into thEir lungs. to EmErgE From povErty, thEy nEED moDErn EnErgy.AnD rEnEwABlEs CAn hElp. From villAgE-sCAlE hyDropowEr to housEholD photovoltAiC systEms to Bio-gAs stovEs thAt ConvErt Dung into FuEl.
ultimAtEly, thE EArth CAn mEEt its EnErgy nEEDs without Fouling thE EnvironmEnt. "But it won’t hAppEn," AssErts thomAs johAnsson, An EnErgy ADvisEr to thE unitED nAtionsDEvElopmEnt progrAm, "without politiCAl will." to BEgin with, wiDEsprEAD govErnmEnt suBsiDiEs For Fossil FuEls AnD nuClEAr EnErgy must BE DismAntlED to lEvEl thE plAying FiElD For rEnEwABlEs. morEovEr, govErnmEnt shoulD prEssurE utility to mEEt tArgEts For rEnEwABlE sourCEs oF EnErgy.
whiCh onE oF thE Following AppliEs to thE usE oF rEnEwABlEs in DEvElopED nAtions
A、thE morE DEvElopED A nAtion is, thE highEr thE proportion oF rEnEwABlEs BEing usED、
B、DEvElopED nAtions ArE ExpEriEnCing A FiErCE EnErgy rEvolution.
C、DEvElopED nAtions’ tiEs with thE oil inDustry ArE BEComing tEnsE.
D、DEvElopED nAtions hAvEn’t rEAChED A ConsEnsus ABout using morE rEnEwABlEs.
skEptiCs mAy rECAll thE Burst oF EnthusiAsm For ConsErvAtion AnD rEnEwABlE powEr whEn oil priCEs quADruplED in thE 1970s. stAtE-FunDED EnErgy rEsEArCh AnD DEvElopmEnt surgED, whilE tAx inCEntivEs BoostED solAr, winD AnD othEr AltErnAtivEs to pEtrolEum AnD thE Atom.But whEn oil suppliEs loosEnED AnD priCEs DroppED in thE EArly 1990s, govErnmEnts lost intErEst. in thE stAtE oFCAliForniA, suBsiDiEs EvAporAtED, pushing winD CompAniEs into BAnkruptCy.
ClEAn EnErgy hAs long wAy to go. only 2.2% oF thE worlD’s EnErgy ComEs From "nEw" rEnEwABlEs suCh As smAll hyDroElECtriC DAms, winD, solAr AnD gEothErmAl. how to Boost thAt shArE--AnD At whAt pACE--is DEBAtED in inDustriAlizED nAtions--From jApAn, whiCh imports 99.7 % oF its oil, to gErmAny, whErE thE nEArByChErnoByl ACCiDEnt turnED thE puBliC AgAinst nuClEAr plAnts, to thE u.s., whErE thEBushADministrAtion hAs strong tiEs to thE oil inDustry.But thE momEntum towArD ClEAn rEnEwABlEs is unDEniABlE. how soon wE rEACh An ErA oF ClEAn, inExhAustiBlE EnErgy DEpEnDs on tEChnology. solAr AnD winD EnErgiEs ArE intErmittEnt: whEn thE sky is ClouDy or thE BrEEzE DiEs Down, Fossil FuEl or nuClEAr plAnts must kiCk into CompEnsAtE.But sCiEntists ArE working on BEttEr wAys to storE ElECtriCity From rEnEwABlE sourCEs.
whilE DEvElopED nAtions DEBAtE how to FuEl thEir powEr plAnts, howEvEr, somE 1.6 Billion pEoplE--A quArtEr oF thE gloBE’s populAtion--hAvE no ACCEss to ElECtriCity or gAsolinE. mAny spEnD thEir DAys CollECting FirEwooD AnD Cow Dung, Burning it in primitivE stovEs thAt BElCh smokE into thEir lungs. to EmErgE From povErty, thEy nEED moDErn EnErgy.AnD rEnEwABlEs CAn hElp. From villAgE-sCAlE hyDropowEr to housEholD photovoltAiC systEms to Bio-gAs stovEs thAt ConvErt Dung into FuEl.
ultimAtEly, thE EArth CAn mEEt its EnErgy nEEDs without Fouling thE EnvironmEnt. "But it won’t hAppEn," AssErts thomAs johAnsson, An EnErgy ADvisEr to thE unitED nAtionsDEvElopmEnt progrAm, "without politiCAl will." to BEgin with, wiDEsprEAD govErnmEnt suBsiDiEs For Fossil FuEls AnD nuClEAr EnErgy must BE DismAntlED to lEvEl thE plAying FiElD For rEnEwABlEs. morEovEr, govErnmEnt shoulD prEssurE utility to mEEt tArgEts For rEnEwABlE sourCEs oF EnErgy.
whiCh onE oF thE Following AppliEs to thE usE oF rEnEwABlEs in DEvElopED nAtions
A、thE morE DEvElopED A nAtion is, thE highEr thE proportion oF rEnEwABlEs BEing usED、
B、DEvElopED nAtions ArE ExpEriEnCing A FiErCE EnErgy rEvolution.
C、DEvElopED nAtions’ tiEs with thE oil inDustry ArE BEComing tEnsE.
D、DEvElopED nAtions hAvEn’t rEAChED A ConsEnsus ABout using morE rEnEwABlEs.
【单选题】不必然任何经济发展都导致生态恶化,但不可能有不阻碍经济发展的生态恶化。
以下哪项最为准确地表达了题干的含义
A.任何经济发展都不必然导致生态恶化,但任何生态恶化都必然阻碍经济发展。
B.有的经济发展可能导致生态恶化,而任何生态恶化都可能阻碍经济发展。
C.有的经济发展可能不导致生态恶化,但任何生态恶化都可能阻碍经济发展。
D.有的经济发展可能不导致生态恶化,但任何生态恶化都必然阻碍经济发展。
E.任何经济发展都可能不导致生态恶化,但有的生态恶化必然阻碍经济发展。
以下哪项最为准确地表达了题干的含义
A.任何经济发展都不必然导致生态恶化,但任何生态恶化都必然阻碍经济发展。
B.有的经济发展可能导致生态恶化,而任何生态恶化都可能阻碍经济发展。
C.有的经济发展可能不导致生态恶化,但任何生态恶化都可能阻碍经济发展。
D.有的经济发展可能不导致生态恶化,但任何生态恶化都必然阻碍经济发展。
E.任何经济发展都可能不导致生态恶化,但有的生态恶化必然阻碍经济发展。
【单选题】每只蜘蛛有8条腿,蜻蜓有6条腿和2对翅膀,蝉有6条腿和1对翅膀,现有这3种小虫共18只,共有118条腿和20对翅膀,其中蝉的数量为( )只.
A.5
B.6
C.7
D.8
E.(E)A、B、C、D都不正确
A.5
B.6
C.7
D.8
E.(E)A、B、C、D都不正确
【单选题】要从含盐16%(质量分数)的40千克盐水中蒸去水分,制出含盐20%(质量分数)的盐水,应当蒸去( )千克的水分.
A.8
B.10
C.11
D.12
E.(E)A、B、C、D都不正确
A.8
B.10
C.11
D.12
E.(E)A、B、C、D都不正确
【单选题】3名医生6名护士被分配到3所学校为学生体检,每校分配1名医生和2名护士,不同的分配方法共有( )种.
A.90
B.180
C.270
D.540
E.(E) A、B、C、D都不正确
A.90
B.180
C.270
D.540
E.(E) A、B、C、D都不正确
【单选题】一口袋中放有大量红球、白球和黑球,它们球数之比为1:2:3,现从中任取4只,查得其中黑球至少有一只的概率是( ).
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