If the market price of salmon is $8.99 per pound but the government will not allow salmon farmers to charge more than $4.99 per pound of salmon, which of the following will happen?

如果只考虑购房规划，以70%贷款，则袁先生每年末应储蓄（）万元，才能在10年后购房时负担得起房屋的首付款。 A: 5.79 B: 4.99 C: 4.12 D: 3.56

假设有一笔面额1000元、6年期的付息债券，年付息率和折现率都是8%，每年付息一次，则该债券的麦考利久期为 （ ） A: 5.01 B: 4.68 C: 4.99 D: 4.08

下列溶液能用HCl或NaOH标准溶液直接滴定的是 (浓度均为0.1mol·L-1) ( ) A: NaAc B: NH4Cl C: HCN D: HCOOH(Kθa (HAc) = 1.79×10-5 ;Kθb (NH3) = 1.8×10-5 ;Kθa (HCN) = 4.99×10-10 ; Kθa (HCOOH) = 1.7×10-4)

1. 你要知道某一批精密新产品（机轴）的外径均值是否为5.10, 你随机抽样了 16 个数据4.94 4.99 5.07 5.04 5.03 5 4.88 4.955.03 5.12 4.93 5.01 4.95 4.98 5.03 5请选用适当的假设检验方法,

假设有一笔面额为1000元、6年期的付息债券，年付息率和收益率都是８％，当利率上升0.01%,该债券的价格将如何变动?已知麦考利久期为4.99 A: -0.462 B: 0.382 C: -0.382 D: 空

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.