20年春北理工《微观经济学》在线作业-1

【奥鹏】-[北京理工大学]北理工《综合英语》在线作业试卷总分:100 得分:100第1题,It was because the applicant was too conceited（）he failed in the interview.A、thatB、so thatC、soD、therefore正确答案:A第2题,This year's yield will be（）.A、high as last yearB、high as last year'sC、as high as last year'sD、as high as last year正确答案:C第3题,The real trouble（）their lack of confidence in their abilities.A、lies inB、lies onC、results inD、leads正确答案:A第4题,The new English dictionary I bought yesterday（）me almost twenty yuan.A、spentB、paidC、costD、took正确答案:C第5题,（）it is you've found,you must give it back to the person it belongs to.A、ThatB、WhatC、WhateverD、However正确答案:C第6题,Dirty water must not be（）with drinking water.A、joinedB、linkedC、mixedD、combined正确答案:C第7题,I wonder if I could use your dictionary?（）A、Go onB、Go aheadC、Go upD、Go away正确答案:B第8题,You can't hear what I'm saying（）you stop speaking.A、only ifB、unlessC、lestD、except that正确答案:B第9题,Mary answered the questions correctly.Yes,（）A、She correccted the questionsB、her questions were correctC、her answers were correctD、she corrected the questions正确答案:C第10题,The father tells his children,"Be at swimming pool at 4 o'clock."So（）A、the children are at the swimming pool nowB、the children are always lateC、the children are going to the swimming poolD、the children won't be there正确答案:C第11题,Don't（）to let me know if there is anything I can do for you.A、rejectB、preventC、hesitateD、refuse正确答案:C第12题,One of his many faults is that he never（）anything very long.A、decidedB、sticks toC、goes overD、makes sure正确答案:B第13题,"We'll do what we can to get the goods（）on time."said the manager of the company.A、reachedB、deliveredC、returnedD、come正确答案:B第14题,Mrs Smith doesn't stop practicing until five o'clock.（）A、She'll start at five o' clock.B、She finishes at five o'clock.C、She doesn't finish at five o'clock.D、She doesn't stop at five o'clock.正确答案:B第15题,He took every（）to improve his spoken English.A、timeB、thingC、chanceD、case正确答案:C第16题,Mike,I am going to skate in the mountains tomorrow.Oh,really?（）A、Good luckB、Great?C、Have a good timeD、Congratulations!正确答案:C第17题,He seems very much（）to the proposal to build a hall.B、competedC、contrastedD、resisted正确答案:A第18题,None of the students went to the game.No,（）A、Some of them wentB、Some didC、not all of them wentD、not any of them went!正确答案:D第19题,The landlady could not（）because all her rooms were booked.A、adapt usB、put up with usC、put us upD、help us正确答案:C第20题,Are the Williams here yet?（）A、No,they don'tB、Yes,he isC、No,he is notD、Yes,they are.正确答案:D第21题,In order to improve our working conditions,this new method must be（）.A、adoptedB、adaptedC、addictedD、adorned正确答案:A第22题,I must apologize to you for the delay.（）A、That's all right.B、No trouble at all.C、All the best.D、You are wellcome.第23题,How do you do?（）A、Fine,thank you.B、How do you do?C、Not too bad.D、Very well.正确答案:B第24题,Isn't their phone number in the book?（）A、Yes,they are.B、Yes,it does.C、No,they don't.D、No,it isn't.正确答案:D第25题,This is a mistake which is typical（）beginners.A、forB、ofC、toD、with正确答案:B第26题,I received a（）parcel yesterday and I am still wondering who may have sent it.A、sincereB、dullC、complicatedD、mysterious正确答案:D第27题,I was（）as to how I could help him out without hurting his pride.A、qutie uselessB、rather uncertainC、quite unpreparedD、wonder正确答案:B第28题,Are you and Bill from Canada?（）A、Yes,they areB、Yes,I amC、Yes,we areD、No,we don't正确答案:C第29题,The young boy took the choose and（）to eat.A、commencedB、commendedC、commentedD、commanded正确答案:A第30题,Oh,sorry to trouble you.（）A、That's okay.B、No,you can't.C、That's good.D、Oh,I don't know.正确答案:A第31题,Teachers often（）such choices.A、benefitB、approachC、refuseD、confront正确答案:D第32题,Jane's dress is similar in design（）her sister's.A、withB、likeC、toD、as正确答案:C第33题,The main road through the city was blocked for three hours today after an accident（）two buses.A、containingB、connectingC、includingD、involving正确答案:D第34题,The airplane arrived one hour behind（）.A、timetableB、planC、dateD、schedule正确答案:D第35题,Hello,how are you?（）A、Hello,how are you?B、How do you do?C、Fine,thank youD、That's OK正确答案:C第36题,In some schools children enjoyed free milk until 1970 when the government （）this benefit.A、presentedB、informedC、expectedD、abolished正确答案:D第37题,They are the private companie（）mostly on profits.A、concentratingB、to be concentratedC、to concentrateD、had concentrate正确答案:A第38题,Sorry,I'm late.（）A、You are welcomeB、It's pleasureC、Take careD、Forget it正确答案:D第39题,I didn't mean to do that.Please forgive me.（）A、Not too badB、It doesn't matterC、It's a pleasureD、Thank you正确答案:B第40题,When are you going to the show?（）A、Last nightB、I amC、YesterdayD、This evening.正确答案:D第41题,We need some toothpaste.（）A、Let's go to the bookstoreB、Let's get someC、Let's buy someD、Let's go正确答案:B第42题,Would you mind if I turned the radio up?（）A、Yes,pleaseB、No,go right aheadC、No,thank youD、Yes,that's all right正确答案:B第43题,He never（）any gifts from people on Christmas Day.A、receivedB、acceptedC、expectedD、took up正确答案:A第44题,Sorry,I can't answer your question.I know（）about the subject.A、a littleB、someC、littleD、few正确答案:C第45题,The book with the red cover is a grammar book.You mean（）A、The book is redB、You like the coverC、The cover is redD、The grammar is easy正确答案:C第46题,Does it（）much to have the TV set repaired.A、payB、spendC、costD、value正确答案:C第47题,Do you have any fresh fish today?（）A、No,I still have a few.B、No,I still have a little.C、Yes,I have some.D、Yes,I have many.正确答案:C第48题,That unfortunate remark（）his ignorance of the subject.A、shelteredB、detectedC、explainedD、exposed正确答案:D第49题,The spy was caught（）,though he died from the wounds the next day.A、deadB、liveC、aliveD、living正确答案:C第50题,It is a pity that she was（）from her husband last year.A、given upB、separatedC、served forD、settled正确答案:B。

1.根据现金流量表，只要按标准折现率折算净现金就可得到（）。

A.净年值B.差额内部收益率C.净现值D.费用现值【参考答案】: C2.当可选择的比选准则采用（）时，就应选择效益-费用比最大的方案。

A.净效益最大准则B.投资效率最大准则C.二者都可【参考答案】: B3.（）是指人们的一种有目的的经济行为，即以一定的资金投入某项计划以获取所期望的报酬。

A.净现金流量B.投资C.收益利润【参考答案】: B4.按一定的折现率将各年净现金流量折现到同一时点的现金累加值就是净现值用（）表示。

A.NPVB.CIC.CO【参考答案】: A5.以计算机集成制造系统为代表的（）是近年来发展起来的新型工厂自动化系统。

A.传统的工业系统B.先进制造系统C.二者皆有【参考答案】: B6.为显示财务条件对企业经济效果的影响，必须分析资金结构因素，具体方法是编制（）。

A.自有资金现金流量表B.全投资现金流量表C.借贷资金现金流量表【参考答案】: A7.度量设备的（）程度，借用的是经济指标。

A.有形磨损B.综合磨损C.无形磨损D.有形磨损或无形磨损【参考答案】: A8.设备遭受（）后的净值等于等效设备的再生产价值减去修理费用。

A.有形磨损B.无形磨损C.第Ⅰ种无形磨损D.综合磨损【参考答案】: D9.每期偿还贷款利息，同时向银行存入一笔等额现金，到期末存款正好偿还贷款本金，称（）。

A.气球法B.等额利息法C.偿债基金法【参考答案】: C10.（）是使用最广泛的一种折旧计算方法。

A.工作量法B.加速折旧法C.曲线折旧法D.年限平均法【参考答案】: D11.（）是从投资项目或企业角度对项目进行的经济分析。

A.经济分析B.财务分析C.盈利分析【参考答案】: B12.（）可使设备精度降低，劳动生产率下降。

A.综合磨损B.无形磨损C.第Ⅱ有形磨损D.第Ⅰ种有形磨损【参考答案】: D13.（）评价是考察企业投资的获利性，反映企业的利益。

A.全投资B.自有资金C.借贷资金D.任何一个都可以【参考答案】: B14.先进制造系统项目的费用和财务收益可以用（）计量。

微观经济学第一次在线作业（Microeconomics for the first timeonline homework）Which of the following first questions is not true about microeconomics and macroeconomics?Your answer: ASubject score: 0.5Score: 0.5Annotation: A is wrong, macroeconomics regards economic whole as the object of study, do not take large-scale industry as the research objectWhich of the following second questions is most likely to be studied by micro economists?Your answer: CSubject score: 0.5Score: 0.5Annotation: the employment problem in an industry is micro, and the other three are macroeconomic issues.The third point on the frontier of production possibilities is...Your answer: ASubject score: 0.5Score: 0.5Note: the point on the boundary of the production possibility is efficient, and the point in it indicates inefficiency.Fourth, if a linear demand curve is tangent to a curve type demand curve, then the demand price elasticity of the two curve at the point of tangency (...)Your answer: ASubject score: 0.5Score: 0.5Note: the price elasticity of demand for a given point depends on its coordinates and slope, whether in straight line or curve, the two factors are the same.Fifth, if the demand curve is a straight line downward to the right, the seller's total income when the price drops from high to lowYour answer: BSubject score: 0.5Note: because the price elasticity of demand on the demand curve is different, the top left point is elastic, so reduce the price when the total income increased, right below the point of lack of flexibility, so reduce the price to reduce total revenue.Sixth, if the price of one of the two goods changes when the price of one of these two goods increases or decreases at the same time, the price elasticity coefficient of the cross demand isYour answer: ASubject score: 0.5Score: 0.5Annotation: if the price of a commodity changes and the demand for two kinds of goods changes at the same time, the two goods are complementary goods, and the cross elasticity of the complementary goods is negative.Seventh, the market supply curve of a commodity is a straight line passing through the origin, and the price elasticity of its supplyYour answer: BSubject score: 0.5Annotation: supply price elasticity =P/Q[1/ (dP/dQ)]=1Eighth, in order to increase revenue, the government decided to levy taxes on the sellers according to the amount of sales. If the government wanted the tax burden to bear on the buyer and did not affect the volume of the transaction as much as possible, then the condition should be thatYour answer: CSubject score: 0.5Score: 0.5Note: the tax burden falls on the less elastic side, ifNinth, the failure of wheat leads to an increase in wheat prices, to be exact, in the processYour answer: ASubject score: 0.5Score: 0.5Note: wheat harvest, wheat supply reduction, the equilibrium quantity corresponding to the new intersection of the supply curve and the demand curve is reduced, it embodies the parallel move, reducing the supply of supply, equilibrium movement alongthe demand curve, demand reduction.The tenth item falls at the same time that both the demand level and the supply level decreaseYour answer: DSubject score: 0.5Score: 0.5Note: as you can see from the graph, the balanced output must be reduced and the price becomes uncertain.The shape of the eleventh - item indifference curve depends onYour answer: ASubject score: 0.5Score: 0.5Note: indifference curves represent consumer preferencesTwelfth, if an indifference curve is horizontal, this indicates that the consumer has reached saturation (X) measured by the cross axis and Y by a vertical axisYour answer: ASubject score: 0.5Score: 0.5Annotation: a horizontal indifference curve indicating that, regardless of the quantity of X products, the utility is the same to consumers. So, X goods are saturated for consumers.The thirteenth - item indifference curve assumes that the marginal rate of substitution of the goods X and Y equals theirYour answer: CSubject score: 0.5Score: 0.5Annotation: this formula can be obtained by definition.Fourteenth, as income and prices change, consumer equilibrium has changed. In the new equilibrium, the marginal utility of various goods is lower than the marginal utility of the original equilibriumYour answer: ASubject score: 0.5Score: 0.5Annotation: according to the law of diminishing marginal utility, the more the two goods consume, the lower the marginalutility, the greater the total utility of the consumer.The fifteenth question assumes that the price of X and Y has been fixed. When MRSXY> PX/PY, the consumer will meet the greatest satisfaction, he willYour answer: ASubject score: 0.5Score: 0.5Annotation: according to the formula, if increasing the consumption of X goods, the increase in marginal utility will be greater than the decrease in marginal utility resulting from the reduction of Y commodity consumption.Sixteenth, the rise in prices of normal items has led to a decrease in demandYour answer: CSubject score: 0.5Score: 0.5Comment: at this time, whether it is the substitution effect or the income effect, the consumption of this kind of goods is reduced by the consumers.The seventeenth question, when APL is positive, but increments,MPL isYour answer: DSubject score: 0.5Score: 0.5Annotation: according to figure, the relation between marginal production and average output, when the marginal production is greater than the average output, the average output increases progressively.In the eighteenth question, the following statement is wrongYour answer: BSubject score: 0.5Score: 0.5Annotation: according to the relation between marginal production and total output, the marginal production decreases, but the total output still increases as long as he is greater than zero.In the nineteenth question, what follows is correctYour answer: DSubject score: 0.5Score: 0.5Note: only the last answer is correct, diminishing marginal returns leads to diminishing marginal rate of substitution between the two elements.The twentieth question, when a manufacturer produces the minimum amount of production at a minimum cost, heYour answer: DSubject score: 0.5Score: 0.5Annotation: for example, a monopolistic manufacturer whose profit maximization point of production is less than the average cost of production at this time.Twenty-first, the short and long term division of economics depends onYour answer: DSubject score: 0.5Score: 0.5Annotation: in economics, in the short run, only the quantity of labor can be adjusted, and in the long run the quantity oflabor and capital can be adjusted.Which of the following statements is true of the twenty-second question?Your answer: BSubject score: 0.5Score: 0.5Note: continuous increase in production may occur at the beginning of decreasing costs, the opportunity cost of the University also includes the income of the work to be abandoned.Twenty-third, the long-term total cost curve is the product of all kindsYour answer: ASubject score: 0.5Score: 0.5Annotation: the trajectory of the lowest cost pointTwenty-fourth, when the law of diminishing returns takes effect, the TVC curveYour answer: DSubject score: 0.5Score: 0.5Annotation:The twenty-fifth problem is the line from the origin and the point of the TC curve, ACYour answer: BSubject score: 0.5Score: 0.5Annotation:In the twenty-sixth question, when the yield is 99 units, the total cost is equal to 995 yuan. When the output increases to A00 units, the average cost is equal to A0 yuan, so that the marginal cost isYour answer: BSubject score: 0.5Score: 0.5Annotation: the total income equals the sum of the marginal revenue, and the total income of 99 units is 1000 of the total income of 995100 units, so the marginal income of the 100thgoods is equal to 5.In the twenty-seventh question, what follows is correctYour answer: BSubject score: 0.5Score: 0.5Annotation: marginal cost increase and marginal revenue decrease are the same reason.Twenty-eighth, the private market is difficult to provide public goodsYour answer: DSubject score: 0.5Score: 0.5Note: a free rider is a public good that does not pay for him, so there is no private offerWhich of the following twenty-ninth questions is the potential solution to the problem of air pollution?Your answer: BSubject score: 0.5Score: 0.5Annotation: as long as the definition of property rights is clear, the externality can be solved through the marketThirtieth, a crowded toll road isYour answer: ASubject score: 0.5Score: 0.5Note: This is both competitive and exclusive, so it's personal.Thirty-first, when the market fails to allocate resources effectively, the ultimate source of the problem is usuallyYour answer: CSubject score: 0.5Score: 0.5Annotation: as long as the definition of property rights is clear, the externality can be solved through the marketThirty-second question, if the output of a competition enterprise doubled, its total incomeYour answer: BSubject score: 0.5Score: 0.5Note: total income = price * output, total competitive market price unchanged, so total revenue doubled.Thirty-third, in the long run, the supply curve of the competing firms is...Your answer: BSubject score: 0.5Score: 0.5Annotation: a fully competitive industry, in the long run, the price should be equal to the marginal cost,The price is higher than the average cost, so the supply curve should be a part of the marginal cost curve above the average cost curveThirty-fourth, if the input needed by production is limited and the industry expands, resulting in an increase in the cost of all firms on the market, then the long-run market supply curve for an item may beYour answer: CSubject score: 0.5Score: 0.5Annotation: as the factor supply is limited, as the demand for the product increases, the demand for this factor increases, the factor price rises, the product cost increases, and the supply curve tilts to the right.In the thirty-fifth question, in the long run equilibrium of the perfect competition market, what statement is wrong about the operating state of an enterprise?Your answer: BSubject score: 0.5Score: 0.5Note: marginal revenue equals marginal cost, and economic profit equals 0.Which of the following thirty-sixth questions is not true about price discrimination?Your answer: CSubject score: 0.5Score: 0.5Note: price discrimination adds to the welfare of consumersThe supply curve of the thirty-seventh question monopolist is Your answer: ESubject score: 0.5Score: 0.5Annotation: there is no supply curve in monopoly marketThirty-eighth, the price charged by the government to force natural monopolies is equal to its marginal costYour answer: DSubject score: 0.5Score: 0.5Annotation: because monopoly market has the characteristics of scale economy, average cost decreases, so marginal cost is less than average cost, and the firm loses according to marginal cost pricing.Thirty-ninth, if the marginal benefit is greater than the marginal cost, a monopolist shouldYour answer: ASubject score: 0.5Score: 0.5Annotation:The fortieth question is that if an oligopoly individual chooses to maximize the profit level of production, the price it collects isYour answer: BSubject score: 0.5Score: 0.5Note: the oligopoly market is between perfect competition and complete monopoly, and the output is less than the perfectly competitive market, but larger than the total monopoly market. The price is less than the total monopoly market, but larger than the perfectly competitive marketTotal score: 20Job Master notation:。

东北农业大学网络教育学院微观经济学作业题（一）一、选择题（每小题1分，共10分）：⒈社会经济资源的基本特征是（）。

A．经济性 B．有用性C．无限性 D．稀缺性2.现有资源不能充分满足人们的欲望这一事实被称为（）A．选择 B．稀缺性C．规范经济学 D．生产什么的问题3.需求表是反映某种商品的（）。

A.价格与需求量之间的关系B.收入与需求量之间的关系C.供给与需求量之间的关系；D.气候与需求量之间的关系4. 下列哪一种情况会引起对汉堡包的需求增加（）。

A．一场新的汉堡包热 B．人口减少了C．作为互补品的炸薯条的价格上升了 D．消费者收入减少了5. 表示需求量减少的是（）。

A．需求曲线向右移动 B．需求曲线向左方移动C．沿着需求曲线向左上方移动 D．沿着需求曲线向右下方移动6. 以下会引起商品供给曲线向左上方移动的因素是（）。

A.生产要素价格提高B.生产技术水平提高C.居民收入水平提高D.人们对商品的偏好增强7．总效用达到最大时（）。

A．边际效用为最大B．边际效用为零C．边际效用为正D．边际效用为负8. 经济学分析中所说的长期是指（）A. 1年以上B. 只能根据产量调整部分生产要素的时期；C. 5年以上D. 全部生产要素均可随产量进行调整的时期。

9. 机会成本是指（）。

A. 因为失去机会而发生的成本B. 为寻找机会而发生的成本C. 资源因用于某种用途而失去其他用途所丧失的最大收入D. 资源在使用上失去选择而发生的成本10．下列哪一种说法不是完全竞争市场的特征（）。

A．存在许多企业 B．每个企业都生产有差别的产品C．进入该市场行业不存在限制 D．企业的产品价格的接受者二、判断题（每小题2分，共20分）：1．资源的稀缺性是经济学产生的前提。

（）2. “人们的收入差距是大一点好还是小一点好”的命题属于实证经济学问题。

（）3.生活必需品通常缺乏需求价格弹性。

（）4．生产要素的边际技术替代率递减是由于边际产量递减。

1.对纳税人投资决策影响为抑制性的情况是（）。

A.税收折旧率实际折旧率B.税收折旧率实际折旧率C.税收折旧率=实际折旧率D.与税收折旧率和实际折旧率无关【参考答案】: A2.税收对生产者的影响，主要通过（）。

A.税收对公共收入的影响来完成B.税收对消费者偏好的影响来完成C.税收对资产负债比的影响来完成D.税收对市场价格机制的干扰来完成【参考答案】: D3.属于纯粹的私人物品的是（）。

A.馒头B.道路C.无线电广播D.灯塔【参考答案】: A4.拥挤性的公共物品（Congestible public goods）随着消费者人数的增加而产生拥挤，从而（）。

A.增加消费者可从中获得的效益B.减少生产者的边际成本C.减少消费者可从中获得的效益D.增加生产者的边际成本【参考答案】: C5.税种的配置中，主体税种的选择一般推崇（）。

A.所得课税B.流转课税C.财产课税D.利润课税【参考答案】: A6.根据固定资本的实际损耗而计提的折旧是（）。

A.税收折旧B.实际折旧C.有形折旧D.无形折旧【参考答案】: B7.公共收入的基本问题是（）。

A.如何把政府部门提供的公共物品的成本费用恰当的分配给社会成员B.如何将政府部门提供的公共物品的成本费用最小化C.如何最大化政府部门的收入总量D.如何均衡政府部门的收支余额【参考答案】: A8.增量预算是指（）。

A.公共收支计划指标的确定，只以新的预算年度的经济社会发展情况为依据，不考虑以前的公共收支状况B.公共收支计划指标在以前预算年度的基础上，按新的预算年度的经济发展情况加以调整之后确定C.公共收支计划指标只以以前预算年度为基础上，不考虑新的预算年度的经济发展情况D.公共收支计划指标的确定，只考虑新的预算年度的经济社会发展情况为依据，不考虑以前的公共收支状况【参考答案】: B9.私人物品的市场需求是对所有消费者在各种价格水平上对该物品需求量的（）。

A.垂直加总B.算术平均数C.水平加总D.几何平均数【参考答案】: C10.公债的发行价格包括（）。

北理工《微观经济学》在线作业-0002
试卷总分:100 得分:100
一、单选题 (共 20 道试题,共 40 分)
1.经济学可定义为（）。

A.研究如何最合理地配置稀缺资源于诸多用途
B.政府对市场制度的干预
C.企业取得利润的活动
D.人民如何依靠收入生活的问题
答案:A
2.厂商的短期供给曲线应该用SMC曲线上大于和等于AVC曲线（）的部分来表示。

A.最高点
B.最低点
C.临界点
D.中间点
答案:B
3.垄断厂商之所以能在长期内获得更大的利润，其原因在于长期内企业的生产规模是可调整的和市场对新加入的厂商是（）的。

A.相对开发
B.完全打开
C.完全关闭
D.半开放
答案:C
4.市场上大量的生产非常接近的（）产品的厂商的总和叫做生产集团。

A.同质
B.同种
C.不同质
D.不同种
答案:B
5.企业的（）是指厂商在生产要素市场上购买或租用他人所拥有的生产要素的实际支出。

A.隐成本
B.销售成本
C.生产成本
D.显成本
答案:D
6.公共选择理论特别注重研究那些与政府行为有关的（）问题。

A.集体选择
B.社会选择
C.公共选择
D.个人选择。

北理工《微观经济学》在线作业试卷总分:100 得分:100一、单选题1. 政府对卖者出售的商品每单位征税5美元，假定这种商品的需求弹性为零，可以预料价格的上升（）。

A. 小于5美元B. 等于5美元C. 大于5美元D. 不可确定正确答案:B2. 由于替代效应，闲暇商品的需求量与闲暇价格（）。

A. 反方向变化B. 同方向变化C. 二者没有关系D. 二者关系无法确定正确答案:A3.（）是指厂商在要素市场上是垄断者，但在产品市场上是完全竞争者。

A. 买方垄断B. 卖方垄断C. 买卖双方垄断D. 以上情况都有可能正确答案:A4. 等产量曲线是在技术水平不变的条件下（）同一产量的两种生产要素投入量的所有不同组合的轨迹。

A. 生产B. 消费C. 研发D. 销售正确答案:A5. 市场上大量的生产非常接近的（）产品的厂商的总和叫做生产集团。

A. 同种B. 不同种C. 同质D. 不同质正确答案:A6. 当垄断市场的需求富于弹性时，MR为（）。

A. 正B. 负C. 0D. 1正确答案:A7. 保持所有其他因素不变，某种商品价格下降，将导致（）。

A. 需求增加B. 需求减少C. 需求量增加D. 需求量减少满分：2 分正确答案:C8. 动态博弈是一种（）进行的博弈A. 单方向B. 双方向C. 反复D. 多方向满分：2 分正确答案:C9. 建筑工人工资提高将使（）。

A. 新房子供给曲线左移并使房子价格上升B. 新房子供给曲线右移并使房子价格下升C. 新房子供给曲线左移并使房子价格下升D. 新房子供给曲线右移并使房子价格上升满分：2 分正确答案:A10. 当某项生产活动存在外部不经济时，其产量（）帕累托最优。

A. 大于B. 小于C. 等于D. 以上情况都有可能满分：2 分正确答案:B11. （）通常指厂商对自己所提供的企业家才能的报酬支付。

A. 正常利润B. 超额利润C. 经济利润D. 实际利润满分：2 分正确答案:A12. 若一条直线型的需求曲线与一条曲线型的需求曲线相切，则切点处两曲线的需求价格弹性（）。