Exercise28 Directions:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.Answerthequestionsbymarkingthecorrespondingletter. Isitcheapertobeawoman--oraman? A.Tocelebratethelaunchofgenderequalityinfinancialservices,Moneyexploredotherareasofspendingtofindoutifthere’sdiscrimination—andaftercrunchingthenumbersfoundthecostofbeingawomanis(mildlyunscientifically)6%morethanaman. Clothes B.Someretailerschargedifferentpricesfornearidenticalitems,dependingonwhetheryouareinthemen’sorthewomen’ssections.Youmightthinkthatmen’sclothesshouldcostmoreastheyarelikelytoinvolvemorematerial,andthisisthecaseatsomeshops-atUniqlo,forinstance，skinnyjeansare£5more,acashmeresweater£10more.However,otherretailerschargewomenmore:atNext,forexample,youwillpay£24fora“supersoftrobe”dressinggown,whileaman’sis£22.Women’sLevi’sjeansare£20morethanthe£70formen’s501s.Overall,wheretherewasadifference,ifyouboughtthesamenumberofidenticalgarments,youwouldpaymoreasaman.ThisseemstobeborneoutbytransactiondatafromBarclaycardwhichshowsthatamongstitscustomers,womenspendanaverageof£59atimeonclothes,whileformenitis£65. C.Butacrossthecourseofayear,womendohaveamuchbiggeroutlay(花费).ThelatestONS(OfficeforNationalStatistics)surveyonhouseholdspendingshowsthatin2011itwasanaverage£244ayearonmen’sclothes,againstanaverageof£458onwomen’sclothes.Women’sshoesaccountedfor£109ayear,whilemen’scost£68.Men’saccessoriescost£10ayear,whilewomen’s£21.Addthisallupandonaveragewomenarespending£588ayearontheirwardrobes,whilemenareshellingout(花大笔钱)£322. Single-sexspending D.TheONSalsohasdataforthecostofunderwear--anditmaynotbeasurprisethathouseholdspendingonwomen’sunderwearishigher,atanaverageof£57.20ayearversus£26formen.AtriptoMarks&Spencerestablishedthatmen’spantscostmorethanknickers,butwomenfaceadditionalcostsfortightsandbras.Asurveyearlierthisyearsuggestedtheaveragewomanhasninebrasinherunderweardrawer-evenifyougoforMarks&Spencer’sbasictwo-packofwhitebras,thatmeansanoutlayofalmost£70,andyouwillneedtoreplacethematsomepoint. E)Anotheritemwomenwillhavetobuypurelybecauseoftheirgenderissanitaryproducts.Theaveragewomanhasperiodsforatleast30yearsofherlifeandtheaveragecycleis28days,soshehas13ayear.Assumingherperiodlastsfivedaysandsheusesfoursanitarytowelsaday,that’s260ayear.Apacketof26AlwaysUltracosts£3.85inBoots,sothataddsupto£38.50ayear,oratleast£1155overalifetime.Fortampons(assuming20cost£1.99)theoutlayislikelytobearound£776over30years. F)Formanywomen,thecostofmake-upaddsaconsiderableamounteachmonth.TheONSsays£2.70aweek,or£140ayear,isspentoncosmetics.Menmightarguethattheyneedtobuyrazors(剃须刀),butsodomanywomen-andtheytendtocostmore.AtBoots,apackof10WilkinsonSwordrazorsaimedatthefemalemarketcost£4.39-£1.30morethanasimilarproductaimedatmen. Thecostofliving G)Thereareothercoststhataredictatedbynature.Women,forexample,areadvisedtohaveanaveragecalorieintakeof2000aday,whileamanneeds2500tomaintainhisweight,somenneed25%morecalorieseveryday.Thiswillnotnecessarilycost25%more-youcanbulkupamealbythrowinginmoreofthecheaperstaplessuchaspastaandriceetc.,butitwilladdtothecost.AsurveyofUSofficeworkersfoundthatmenwhoboughttakeawaysandwicheswerespendingalmostdoubleonluncheachweekthantheirfemalecounterparts. H)Womenarealsoadvisedtodrinkless-twotothreeunitsadayagainstthethreeorfourguidelineformen.Abottleofwineat13.5%alcoholcontains10.13units.Ifitcosts£4.99,assumingyouhavethemaximumeachday,asawomanyouwillspend£1.47andasaman£1.96.That’sabigassumption--manypeopledrinkless,somemore. I)Onebigthingtorememberisthatalthoughalcoholmaybeapreservative,womenarelikelytolivelonger,andwillthereforehavetomeettheirlivingcostsformoreyears.In2010theaveragelifeexpectancyatbirthwas82forwomenand78formen:thatmeansforkingoutforfood,heating,travel,entertainment,forfourextrayears.Thechangetoannuityratesbroughtinbythegenderdirectivemeansthatwomenwillgetthesameincomeasaman,regardlessofthefactthattheyareexpectedtolivelonger,buttheywillneedtofactortheseyearsofextraspendingintotheirothersavings. Haircuts J)Askmostmenhowmuchtheypayforahaircutandthey’llprobablysayaroundatennerattheirlocalbarber.Unlesstheyarefriendswithahairdresser,womenwillusuallyspendatleastdoublethat.Thiswillbeinpartbecausetheygotodifferentplacesfortheircuts,butevenifamanandawomanwalkedintothesamesalonthewomanwouldprobablyenduppayingmore. K)Manysalonshavestoppedpricingaccordingtosex,butsomequotedifferentcostsaccordingtothelengthofhair,whichmeanswomenarelikelytoendupspendingmore.InSupercuts,forexample,pricesareadvertisedasstartingfrom£13.95foracutand£16.95foracutandwash.Atmylocalsalonthehairdressersaidamanwouldpay£16.95or£18.95,whileacutandshampooofmyshoulder-lengthhairwouldcost£23.90. L)Bythispointyoumaywellbeshouting“Ineedtobuyrazorsfarmoreoftenthanmygirlfriend”or“Ihavetospendonmyhair,you’reabaldie(光头)”,andofcourseyourindividualcircumstanceswillaffectyourspendinghabitsandneeds-oryoumayhaveotherexamplesofinstanceswherepricingisdifferentforeachsex. 1.Intermsofasingledayoryear,menusuallyconsumemorealcoholthanwomen. 2.Morematerialusedmakesthemen’sclothesmoreexpensivethanwomen’satUniqlo. 3.People’sspendinghabitsandneedsaredifferentaccordingtotheirownsituations. 4.AccordingtotheONS,women’sspendingonunderwearismorethantwiceasmuchasthatofmen’s. 5.Razorsseemtobenecessaryforbothmenandwomen. 6.Thelongerlifeofwomenmeanstheirlifetimeexpensesmaygetbigger. 7.Onaverage,thatmenneedmorecaloriesthanwomenisthemaincauseofthedifferencebetweenmen’sandwomen’scostoffood. 8.Nomatterwhethermenandwomengotothesameordifferentplacesforhaircut,womenarelikelytospendmorethanmen. 9.Accordingtoasurveyonhouseholdspending,peoplespendmostonclothesratherthanshoesandaccessories 10.Insomesalons,thepriceofhaircutisnotsetbysexanymore,butsometimesbyhowlongthehairis.
Exercise28 Directions:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.Answerthequestionsbymarkingthecorrespondingletter. Isitcheapertobeawoman--oraman? A.Tocelebratethelaunchofgenderequalityinfinancialservices,Moneyexploredotherareasofspendingtofindoutifthere’sdiscrimination—andaftercrunchingthenumbersfoundthecostofbeingawomanis(mildlyunscientifically)6%morethanaman. Clothes B.Someretailerschargedifferentpricesfornearidenticalitems,dependingonwhetheryouareinthemen’sorthewomen’ssections.Youmightthinkthatmen’sclothesshouldcostmoreastheyarelikelytoinvolvemorematerial,andthisisthecaseatsomeshops-atUniqlo,forinstance，skinnyjeansare£5more,acashmeresweater£10more.However,otherretailerschargewomenmore:atNext,forexample,youwillpay£24fora“supersoftrobe”dressinggown,whileaman’sis£22.Women’sLevi’sjeansare£20morethanthe£70formen’s501s.Overall,wheretherewasadifference,ifyouboughtthesamenumberofidenticalgarments,youwouldpaymoreasaman.ThisseemstobeborneoutbytransactiondatafromBarclaycardwhichshowsthatamongstitscustomers,womenspendanaverageof£59atimeonclothes,whileformenitis£65. C.Butacrossthecourseofayear,womendohaveamuchbiggeroutlay(花费).ThelatestONS(OfficeforNationalStatistics)surveyonhouseholdspendingshowsthatin2011itwasanaverage£244ayearonmen’sclothes,againstanaverageof£458onwomen’sclothes.Women’sshoesaccountedfor£109ayear,whilemen’scost£68.Men’saccessoriescost£10ayear,whilewomen’s£21.Addthisallupandonaveragewomenarespending£588ayearontheirwardrobes,whilemenareshellingout(花大笔钱)£322. Single-sexspending D.TheONSalsohasdataforthecostofunderwear--anditmaynotbeasurprisethathouseholdspendingonwomen’sunderwearishigher,atanaverageof£57.20ayearversus£26formen.AtriptoMarks&Spencerestablishedthatmen’spantscostmorethanknickers,butwomenfaceadditionalcostsfortightsandbras.Asurveyearlierthisyearsuggestedtheaveragewomanhasninebrasinherunderweardrawer-evenifyougoforMarks&Spencer’sbasictwo-packofwhitebras,thatmeansanoutlayofalmost£70,andyouwillneedtoreplacethematsomepoint. E)Anotheritemwomenwillhavetobuypurelybecauseoftheirgenderissanitaryproducts.Theaveragewomanhasperiodsforatleast30yearsofherlifeandtheaveragecycleis28days,soshehas13ayear.Assumingherperiodlastsfivedaysandsheusesfoursanitarytowelsaday,that’s260ayear.Apacketof26AlwaysUltracosts£3.85inBoots,sothataddsupto£38.50ayear,oratleast£1155overalifetime.Fortampons(assuming20cost£1.99)theoutlayislikelytobearound£776over30years. F)Formanywomen,thecostofmake-upaddsaconsiderableamounteachmonth.TheONSsays£2.70aweek,or£140ayear,isspentoncosmetics.Menmightarguethattheyneedtobuyrazors(剃须刀),butsodomanywomen-andtheytendtocostmore.AtBoots,apackof10WilkinsonSwordrazorsaimedatthefemalemarketcost£4.39-£1.30morethanasimilarproductaimedatmen. Thecostofliving G)Thereareothercoststhataredictatedbynature.Women,forexample,areadvisedtohaveanaveragecalorieintakeof2000aday,whileamanneeds2500tomaintainhisweight,somenneed25%morecalorieseveryday.Thiswillnotnecessarilycost25%more-youcanbulkupamealbythrowinginmoreofthecheaperstaplessuchaspastaandriceetc.,butitwilladdtothecost.AsurveyofUSofficeworkersfoundthatmenwhoboughttakeawaysandwicheswerespendingalmostdoubleonluncheachweekthantheirfemalecounterparts. H)Womenarealsoadvisedtodrinkless-twotothreeunitsadayagainstthethreeorfourguidelineformen.Abottleofwineat13.5%alcoholcontains10.13units.Ifitcosts£4.99,assumingyouhavethemaximumeachday,asawomanyouwillspend£1.47andasaman£1.96.That’sabigassumption--manypeopledrinkless,somemore. I)Onebigthingtorememberisthatalthoughalcoholmaybeapreservative,womenarelikelytolivelonger,andwillthereforehavetomeettheirlivingcostsformoreyears.In2010theaveragelifeexpectancyatbirthwas82forwomenand78formen:thatmeansforkingoutforfood,heating,travel,entertainment,forfourextrayears.Thechangetoannuityratesbroughtinbythegenderdirectivemeansthatwomenwillgetthesameincomeasaman,regardlessofthefactthattheyareexpectedtolivelonger,buttheywillneedtofactortheseyearsofextraspendingintotheirothersavings. Haircuts J)Askmostmenhowmuchtheypayforahaircutandthey’llprobablysayaroundatennerattheirlocalbarber.Unlesstheyarefriendswithahairdresser,womenwillusuallyspendatleastdoublethat.Thiswillbeinpartbecausetheygotodifferentplacesfortheircuts,butevenifamanandawomanwalkedintothesamesalonthewomanwouldprobablyenduppayingmore. K)Manysalonshavestoppedpricingaccordingtosex,butsomequotedifferentcostsaccordingtothelengthofhair,whichmeanswomenarelikelytoendupspendingmore.InSupercuts,forexample,pricesareadvertisedasstartingfrom£13.95foracutand£16.95foracutandwash.Atmylocalsalonthehairdressersaidamanwouldpay£16.95or£18.95,whileacutandshampooofmyshoulder-lengthhairwouldcost£23.90. L)Bythispointyoumaywellbeshouting“Ineedtobuyrazorsfarmoreoftenthanmygirlfriend”or“Ihavetospendonmyhair,you’reabaldie(光头)”,andofcourseyourindividualcircumstanceswillaffectyourspendinghabitsandneeds-oryoumayhaveotherexamplesofinstanceswherepricingisdifferentforeachsex. 1.Intermsofasingledayoryear,menusuallyconsumemorealcoholthanwomen. 2.Morematerialusedmakesthemen’sclothesmoreexpensivethanwomen’satUniqlo. 3.People’sspendinghabitsandneedsaredifferentaccordingtotheirownsituations. 4.AccordingtotheONS,women’sspendingonunderwearismorethantwiceasmuchasthatofmen’s. 5.Razorsseemtobenecessaryforbothmenandwomen. 6.Thelongerlifeofwomenmeanstheirlifetimeexpensesmaygetbigger. 7.Onaverage,thatmenneedmorecaloriesthanwomenisthemaincauseofthedifferencebetweenmen’sandwomen’scostoffood. 8.Nomatterwhethermenandwomengotothesameordifferentplacesforhaircut,womenarelikelytospendmorethanmen. 9.Accordingtoasurveyonhouseholdspending,peoplespendmostonclothesratherthanshoesandaccessories 10.Insomesalons,thepriceofhaircutisnotsetbysexanymore,butsometimesbyhowlongthehairis.
Whichtwowordsareclosestinmeaning?<br/><b>cycle</b><b>，</b><b>hawk</b><b>，</b><b>convey</b><b>，</b><b>extort</b><b>，</b><b>peddle</b><b>，</b><b>summon</b>
Whichtwowordsareclosestinmeaning?<br/><b>cycle</b><b>，</b><b>hawk</b><b>，</b><b>convey</b><b>，</b><b>extort</b><b>，</b><b>peddle</b><b>，</b><b>summon</b>
设A{a,b}，则P(A)×A = ( )。 A: A B: P（A） C: {<Φ,a>,<Φ,b>,<{a},a>,<{a},b>,<{b},a>,<{b},b>,<A,a>,<A,b>} D: {<a,,Φ,>,<b,,Φ,>,<a,{a}>,<b,{a}>,<a,{b}>,<b,{b}>,<a,A>,<b,A>}
设A{a,b}，则P(A)×A = ( )。 A: A B: P（A） C: {<Φ,a>,<Φ,b>,<{a},a>,<{a},b>,<{b},a>,<{b},b>,<A,a>,<A,b>} D: {<a,,Φ,>,<b,,Φ,>,<a,{a}>,<b,{a}>,<a,{b}>,<b,{b}>,<a,A>,<b,A>}
以下哪段代码可以将A,B的值互换（） A: A=A^B; B=A^B;A=A^B B: A= A^B;A=A^B;B=A^B C: B= A^B; B=A^B; A=A^B D: B=A^B; A= A^B; A= A^B
以下哪段代码可以将A,B的值互换（） A: A=A^B; B=A^B;A=A^B B: A= A^B;A=A^B;B=A^B C: B= A^B; B=A^B; A=A^B D: B=A^B; A= A^B; A= A^B
若集合A={a，b}，B={ a，b，{ a，b }}，则（）。 A: A⊆B，且A∈B B: A∈B，且B⊆A C: A⊈B，且A∉B D: A∉B，且A⊈B
若集合A={a，b}，B={ a，b，{ a，b }}，则（）。 A: A⊆B，且A∈B B: A∈B，且B⊆A C: A⊈B，且A∉B D: A∉B，且A⊈B
设论域D={a,b}，与公式[img=504x85]17d6234b6469e12.png[/img]等价的命题公式是（ ） A: (A（a）∧A（b）) → (B（a）∧B（b）) B: (A（a）→B（a）)∨(A（b）→B（b）) C: (A（a）∨A（b）) → (B（a）∨B（b）) D: (A（a）→B（a）)∧(A（b）→B（b）)
设论域D={a,b}，与公式[img=504x85]17d6234b6469e12.png[/img]等价的命题公式是（ ） A: (A（a）∧A（b）) → (B（a）∧B（b）) B: (A（a）→B（a）)∨(A（b）→B（b）) C: (A（a）∨A（b）) → (B（a）∨B（b）) D: (A（a）→B（a）)∧(A（b）→B（b）)
设论域D={a,b},与公式[img=126x21]17da63121bb0ede.png[/img]等价的命题公式是( ) A: (A(a)∧A(b)) → (B(a)∧B(b)) B: (A(a)→B(a))∨(A(b)→B(b)) C: (A(a)∨A(b)) → (B(a)∨B(b)) D: (A(a)→B(a))∧(A(b)→B(b))
设论域D={a,b},与公式[img=126x21]17da63121bb0ede.png[/img]等价的命题公式是( ) A: (A(a)∧A(b)) → (B(a)∧B(b)) B: (A(a)→B(a))∨(A(b)→B(b)) C: (A(a)∨A(b)) → (B(a)∨B(b)) D: (A(a)→B(a))∧(A(b)→B(b))
优学院: <p class="MsoNormal"> <b>一人造地球卫星到地球中心</b><b>O</b><b>的最大距离和最小距离分别是</b><b>R</b><b><sub>A</sub></b><b>和</b><b>R</b><b><sub>B</sub></b><b>．设卫星对应的角动量分别是</b><b>L</b><b><sub>A</sub></b><b>、</b><b>L</b><b><sub>B</sub></b><b>，动能分别是</b><b>E</b><b><sub>KA</sub></b><b>、</b><b>E</b><b><sub>KB</sub></b><b>，则应有</b><b> </b><b> </b><b> [ </b><b> </b><b> ]</b><b><o:p></o:p></b> </p> <p class="MsoNormal"> <b><br> </b> </p>
优学院: <p class="MsoNormal"> <b>一人造地球卫星到地球中心</b><b>O</b><b>的最大距离和最小距离分别是</b><b>R</b><b><sub>A</sub></b><b>和</b><b>R</b><b><sub>B</sub></b><b>．设卫星对应的角动量分别是</b><b>L</b><b><sub>A</sub></b><b>、</b><b>L</b><b><sub>B</sub></b><b>，动能分别是</b><b>E</b><b><sub>KA</sub></b><b>、</b><b>E</b><b><sub>KB</sub></b><b>，则应有</b><b> </b><b> </b><b> [ </b><b> </b><b> ]</b><b><o:p></o:p></b> </p> <p class="MsoNormal"> <b><br> </b> </p>
设个体域D={a，b}与公式∀x A(x)∧∀xB(x) 等价的命题公式是( ) A: (A(a)∧A(b)) ∧(B(a) ∧B(b)) B: (A(a)∨A(b)) ∧(B(a) ∨B(b)) C: (A(a)∧A(b))∨(B(a)∧B(b)) D: (A(a)∨B(a)) ∧(A(b) ∨B(b))
设个体域D={a，b}与公式∀x A(x)∧∀xB(x) 等价的命题公式是( ) A: (A(a)∧A(b)) ∧(B(a) ∧B(b)) B: (A(a)∨A(b)) ∧(B(a) ∨B(b)) C: (A(a)∧A(b))∨(B(a)∧B(b)) D: (A(a)∨B(a)) ∧(A(b) ∨B(b))
设A=ía,bý,B=í1,2,3ý,求:A×B,B×A,A×A,B×B和(A×B)∩( B×A)。
设A=ía,bý,B=í1,2,3ý,求:A×B,B×A,A×A,B×B和(A×B)∩( B×A)。