PMP认证考试模拟题1
1.These two processes in the Controlling process group are performedin parallel to assure correctness and acceptance of the work. Which are they? A.Quality Assurance and Scope Verification B.Quality Assurance and Scope Control C.Quality Control and Scope Verification D.Quality Control and Scope Control 1.在控制过程中有两个过程同步进行以保证工作的正确性和验收,这两个过程分别是: A.质量保证和范围核实 B.质量保证和范围控制 C.质量控制和范围核实 D.质量控制和范围控制 2.You are working on a project that is similar in scope to a projectperformed last year by your company.You might consider which of the following? A.Using the previous project's alternatives identification as atemplate B.Reusing the previous project's benefit/cost analysis asjustification for this project C.Using the previous project's WBS as a template D.Reusing the previous project's product description when writing thescope statement 2.你正在进行的一个项目和你公司去年进行的一个项目的范围是类似的。你可以考虑下列哪一项? A.利用从前项目的方案识别作为模板 B.重复利用从前项目的效益/成本分析作为验证该项目的依据 C.利用从前项目的WBS作为模板 D.撰写范围说明书时重复利用从前项目的产品描述 3.You and a friend of yours have started your own consulting firm.Both of you are PMPs.You've given an estimate to aprospective client to manage a project they're starting up next month.This is an important job, and thisclient would be an excellent reference for you if things go well.You know all of the followingstatements are true except: A.Your estimate of costs should accurately reflect the services you'regoing to provide. B.If you get the job, you should stick to the scope and objectives yououtlined in your bid or contract regarding the professional services you'llrender. C.You should respect the confidentiality of the information you'llcome across during the course of this project. D.Since it's close to the holiday season, you send an expensive giftbasket to the client in the hopes they'll pick your company to run this project. 3.你和你的一个朋友创立了一个咨询公司,你们都是PMP.你接受了预期客户于下月将要启动的一个项目的估算。这个工作很重要,如果进展顺利将会给你到来良好的资信证明。下面的说法中除了哪个以外都是正确的? A.你的成本估算应当准确反映你将要提供的服务。 B.如果你得到这个工作,你应该按照你的标书货合同中描述的范围和目标提供你的专业服务。 C.你应当在项目期间遵守你可能遇到的保密信息的有关规定。 D.因为快要放假了,你给客户送一个贵重的花篮以期客户选择你来管理项目。 4.The risk management plan accomplishes all of the following except: A.It defines the methodology to risk management on the project. B.It describes the risk categories. C.It defines the roles and responsibilities of the risk managementteam. D.It addresses responses to individual risks and how they will becarried out during the project. 4.风险管理计划进行以下各项,但不包括: A.定义项目风险管理的方法论 B.描述风险类别 C.定义风险管理团队的角色职责 D.处理单个风险的应对以及在项目中如何实施 5.The expected value for your project duration estimate is 627 days,and the most likely duration estimate is 575. The standard deviation is 14. Which of the following statements is true? A.A 95 percent confidence factor would make this project durationbetween 547 days and 603 days. B.The project duration-given a 95 percent confidence factor-is between613 days and 641 days. C.The project duration-given a 99 percent confidence factor-is between585 days and 669 days. D.A 68 percent confidence factor would make this project durationbetween 547 days and 603 days. 5.项目历时估算的预期值是627天,而最可能的历时估算为575天,标准差为14天, 下面哪一种陈述是正确的? A.按照95%的置信度,项目历时定为547至603天 B.按照95%的置信度,项目历时应为613至641天 C.按照99%的置信度,项目历时应为585至669天 D.按照68%的置信度,项目历时应为547至603天 6.If EV = 114, PV = 120, and AC = 103, what are CPI and SPI,respectively? A.1.1 and 0.95 B.1.2 and 1.05 C.1.05 and 1.2 D.0.95 and 1.1 6.如果EV=114,PV=120,AC=103,那么CPI和SPI分别是多少? A.1.1和0.95 B.1.2和1.05 C.1.05和1.2 D.0.95和1.1 7.You're in the midst of managing a project for the water andsanitation district of your local city.It's a large, complicated project that you've divided into smaller,manageable projects with their own project managers who all report to you. Two of these projects have beencontracted out to a vendor. You know that specific technical elements must be adhered to in thedesign and implementation of this project due to regulations governing thewater and sanitation district. Two other project managers in the district are busy working onunrelated projects, but they're subject to the same regulations and processesas your project. Theseregulations won't affect your next project, which you've learned is with thecity police department. Which of the following statements is not true? A.The water and sanitation district prefers managing their projects ina coordinated fashion known as programs. B.Phase exits are required for all vendor projects. C.The projects in this district are considered an application area dueto their common elements. D.Your project is employing the use of subprojects. 7.在你所在的城市,你管理一个水务局的项目,这是一个大型的复杂项目,所以你把它分解为更小的、可管理的项目,并任命了各自的项目经理向你汇报,其中两个项目外包给供应商。该项目必须达到相应的具体技术指标以满足该局水务管理的有关规范。另外还有两个项目经理正在进行与该项目不相关的项目,但要符合和你的项目同样的水务规范和流程。从市管理部门得知,这样的规范不会影响到你未来的项目。下面那种说法是错误的? A.该水务局愿意以协调的方式用大型项目来管理这些项目 B.所有外包项目需要阶段把关 C.由于这些项目的共性,它们属于一个专业领域 D.你的项目采用了子项目 8.If EV = 145, PV = 162, AC = 138, BAC = 200, what is EAC when youknow past estimating assumptions are no longer valid? A.190.4 B.193 C.201 D.200 8.如果EV=145,PV=162,AC=138,BAC=200,如果你知道过去的估算假设已经不复有效,那么EAC应该是多少? A.190.4 B.193 C.201 D.200 9.All of the following statements are true regarding the TeamDevelopment process except for which one? A.The output of Developing Project Team process is team performanceappraisals. B.Team Development is performed during the Executing processes. C.Team building activities include both management actions andindividual actions to improve team performance. D.Collocation is a technique used to help the team perform better. 9.关于团队发展,下面哪一个说法是错误的? A.发展项目团队的输出是团队绩效评估 B.团队发展是在执行过程 C.团队建设活动包括管理行为和个人行为以提高团队绩效 D.集中办公是一种帮助团队有更好绩效的方法 10.You are asked to perform a feasibility study to determine the bestproject to run. Theproject's initial investment is $29,000. Alternative A's cash flows are $14,000 for year 1 and $19,000 foryear 2.AlternativeB's cash inflows are $21,000 for year 1 and $20,000 for year 2. Alternative C's cash inflows are$15,000 for year 1 and $20,000 for year 2. Assume a 10 percent cost of capital.Which project should you recommend based on the NPV of the threealternatives? A.Alternative A B.Alternative B C.Alternative C D.None of the above 10.你被要求执行一个可行性分析来决定最佳项目。项目的初始投资为29,000美元。项目A的现金流为第一年14,000美元,第二年为19,000美元,项目B的现金流为第一年21,000美元,第二年为20,000美元,项目C的现金流为第一年15,000美元,第二年为20,000美元。假设资本成本为10%,根据三个项目的净现值,你推荐哪一个项目? A.项目A B.项目B C.项目C D.哪一个都不推荐 11.All of the following Controlling processes have a change controlsystem as a tool and technique of the process except: A.Quality Control B.Scope Change Control C.Schedule Control D.Cost Control 11.变更控制系统是下列过程的工具方法,但不包括: A.质量控制 B.范围变更控制 C.进度控制 D.成本控制 12.This tool and technique of Risk Monitoring and Control is interestedin looking at the implementation and the effective use of the transference,avoidance, and mitigation risk strategies.What is it? A.Risk reassessment B.Project change requests C.Project risk audit D.Workaround plans 12.这是一个风险监控的工具方法,它被用以查看风险策略中转移、规避和减轻的实施以及有效性,它是什么? A.风险再评估 B.项目变更请求 C.项目风险审计 D.临时权变计划 13.You and your friend are studying together for the PMP exam. You purchased a copy of this bookto study from while your friend purchased a copy of another author's book. Both books came with a CD.You each decide to copy the CD fromthe book you purchased to share with each other.Which of the following statements is true? A.Since neither of you is a PMP yet, you're not required to adhere tothe PMP Code of Professional Conduct, so sharing the CDs is acceptable. B.You and your friend should not share the CDs because of conflict ofinterest. C.The CDs with both books are considered intellectual property andshould not be copied. D.You and your friend should not share the CDs because of theappearance of impropriety. 13.你和你的朋友一起学习准备PMP考试,你买了一册书,你的朋友买了另一作者的书。这两本书各有一CD,你们决定互相拷贝书上的CD.下面哪一种说法是正确的? A.因为你们还没有成为PMP,所以不需要遵守PMP行为规范,所以,可以互相拷贝CD. B.因为存在利益冲突,所为,不能和你的朋友互相拷贝CD. C.书所附带的CD是知识产权,所以,不能拷贝。 D.因为存在不当行为,所以,不能拷贝。 14.Which of the following choices include all the tools and techniquesto the process of activity duration estimating? A.Analogous estimating, parametric estimating and three-pointestimating B.Expert judgment, analogous estimating, parametric estimating andthree-point estimating C.Expert judgment, analogous estimating, parametric estimatingthree-point estimating durations and reserve analysis D.Expert judgment, analogous estimating, parametric estimatingthree-point estimating durations and bottom-up estimating 14.活动历时估算的工具方法包括: A.类比估算、参数估算、三点估算 B.专家判断、类比估算、参数估算、三点估算 C.专家判断、类比估算、参数估算、三点估算和储备分析 D.专家判断、类比估算、参数估算、三点估算和自下而上估算 15.You have received three estimates for your project activity. The optimistic estimate is 245days, the pessimistic estimate is 269 days, and the most likely estimate is 257days. Thisparticular activity is critical to the project, and your project sponsor wantsto know with 95 percent certainty how long it will take to complete thisactivity. Which of thefollowing do you tell the project sponsor? A.265 days to 273 days B.253 days to 261 days C.261 days to 277 days D.249 days to 265 days 15.你获得项目活动的三种估算。最乐观估算为245天,最悲观估算为269天,最可能估算为257天。这个活动对项目非常关键,你的项目发起人希望获得关于活动历时95%的确定结果,你将向发起人汇报: A.265至273天 B.253至261天 C.261至277天 D.249至265天 16.The project team closes in on completion when an error is discovered. Fixing the error will actuallycause a change in scope. And if you don't fix this error, the project deliverable will belate.Which of thefollowing actions do you take? A.Inform your team to stop working until you can get the CCB toapprove or deny the change. B.Tell the team to fix the error since this is an emergency and yourauthority is already documented in the procedure. C.Don't fix the error since there are no procedures documented in yourchange control system for emergencies. D.Fix the error and inform the CCB at the next meeting because you thinktime is the primary constraint for this project. 16.项目团队快要完工的时候发现一个错误,修复错误将会引起范围的变更;不修复错误,项目交付成果将会延期,你的行动应该是: A.通知团队停止工作,直到获得CCB批准或者否决这一变更。 B.告诉团队修复错误,因为这是一个紧急事件,而且你的权力已经记录在操作程序里。 C.不要修复错误,因为你的变更控制系统里没有关于紧急状态的程序规定。 D.修复错误,然后下次开会的时候通知CCB,因为你认为时间是该项目的主要约束。 17.You're working on an internal service project and are in thebeginning of the Planning processes. You noticed that specific staff members were named as project teammembers during your review of the project charter. Which of the following does this question describe? A.Resource availability B.Pre-assignment C.Staff management plan D.Virtual teams 17.你管理一个内部服务项目并处于计划过程中,你注意到在你审阅项目章程时发现某些员工已经被指定为项目团队成员,这个问题说明了: A.资源可利用性 B.预分配 C.员工管理计划 D.虚拟团队 18.You have just passed the PMP exam. Your friend is still studying and plans on taking the exam nextmonth. Youpurchased a copy of this book to study from, while your friend purchased a copyof another author's book. Since you're finished studying, you agree to loan your book withthe CD to your friend so she can use it to study from also. Which of the following statementsis true? A.Since you are a PMP, you're required to adhere to the PMP Code ofProfessional Conduct, so sharing the book and CD is not acceptable. B.Since you are a PMP, you should not share the book and CD with yourfriend, because it may pose a conflict of interest for your friend. C.The book and CD are considered intellectual property and should notbe copied. However,loaning your copy to your friend to use, as long as she doesn't copy it, isacceptable. D.Since you are a PMP, you're required to adhere to the PMP Code ofProfessional Conduct and should not share the book and CD with your friendbecause of the appearance of impropriety. 18.你刚刚考过了PMP,你的朋友准备下一个月考PMP.你买了一本书来学习,而你的朋友买了另一种书。你已经学完了,所以你打算把你的书和书上的CD借给你的朋友学习。下面哪一种说法是正确的? A.既然是PMP,就要遵守行为规范,所以不能借 B.既然你是PMP,就不要借书和CD给你的朋友,你们有利益冲突 C.书和CD都是知识产权,所以是不能拷贝的。只要不复制,借给朋友使用是可以接受的。 D.既然是PMP,就要遵守行为规范,所以不能共享书和CD,因为这属于行为不当。 19.All of the following are true statements regarding the QuantitativeRisk Analysis process except for which one? A.This process uses decision tree analysis, which is a type ofsensitivity analysis. B.This process determines the size of the schedule and costcontingency reserves. C.This process helps determine the probability of achieving theproject objectives. D.This process generally follows Qualitative Risk Analysis but can beperformed separately if desired. 19.关于风险定量分析出了哪一个之外都是正确的? A.这一过程使用决策树分析,它是敏感性分析的一种。 B.这一过程决定了进度和成本的应急储备。 C.这一过程有助于确定实现项目目标的概率。 D.这一过程通常在风险定性分析之后进行,但也可以单独进行。 20.You are using the interviewing technique of the Quantitative RiskAnalysis process.Theprobability distribution you intend to use is triangular distribution.All of the following statements aretrue regarding this question except: A.Interviewing techniques are used to quantify the probability andimpact of the risks on project objectives. B.The information gathered depends on the type of probabilitydistribution used. C.The triangular distribution typically uses symmetrical discretedistribution. D.Triangular distributions rely on mean and standard deviation toquantify risks. 20.你在风险定量分析过程使用访谈技术,你打算使用的概率分布是三角分布。下面哪一个说法是错误的? A.访谈技术应用于项目目标风险的概率和后果的量化 B.收集的信息取决于所选用的概率分布类型 C.三角分布典型的使用对称的非持续性概率分布 D.三角分布依靠平均值和标准差来量化风险 21.All of the following statements are true regarding the timeconstraints of imposed dates and key events except: A.Imposed dates and key events constraints are inputs to integratedchange control process. B.Imposed dates apply to activities that must start no later than orfinish no later than a specific date. C.The key events time constraint applies to the completion ofdeliverables by the requested date of a stakeholder. D.Requested completion dates often become expected dates and thereforepose a time constraint. 21.关于时间约束中的强加日期和关键事件,那个说法是错误的? A.强加日期和关键事件是整体变更控制过程的输入 B.强加日期应用于其开始或完成日期不得迟于某一指定日期的那些活动 C.关键事件约束是指干系人所要求的完工活动的期限 D.请求的完工日期经常成为预期的完工日期,因此成为时间约束 22.This win-win conflict resolution technique is the one that projectmanagers should use most. A.Confrontation B.Compromise C.Withdrawal D.Smoothing 22.一种项目经理最常用的双赢的矛盾解决方法是: A.对撞 B.让步 C.撤退 D.缓和 23.You are working with a group of managers to decide which projects topursue. Cost is animportant consideration. Which type of costs should not be a criteria in project selection? A.Indirect costs B.Sunk costs C.Tangible costs D.Intangible costs 23.你和一个经理团队一起决定进行哪一些项目,成本是重要的考虑因素,下面哪一项不是项目选择的标准? A.直接成本 B.沉没成本 C.有形成本 D.无形成本 24.One of your team members, a fellow PMP, is under investigation forviolation of the PMP Code of Professional Conduct . What action should you take? A.Cooperate fully with PMI in the investigation. B.Tell PMI it would be a conflict of interest for you to cooperate inthe investigation, because this person is your team member. C.Tell PMI it would be a conflict of interest for you to cooperate,because they may uncover information about you during the investigation thatcould cause them to investigate you. D.Cooperate with PMI by truthfully answering all their questions butrefuse to give them any written documentation. 24.你的一个团队成员,也是一个PMP,正在接受PMP行为规范的违规调查,你应该: A.完全配合PMI的调查。 B.告诉PMI如果你配合PMI的调查就构成了利益冲突,因为他是你的团队成员。 C.告诉PMI如果你配合PMI的调查就构成了利益冲突,因为他们会透露一些信息从而导致PMI对你的调查。 D.配合PMI的调查,认真回答问题,但拒绝提交任何书面文档。 25.Information-gathering techniques used in the Risk Identificationprocess include all of the following except: A.Brainstorming B.Delphi technique C.Interviewing D.Monte Carlosimulation 25.风险识别中的信息收集技术包括以下各项,但不包括: A.头脑风暴 B.德尔菲技术 C.访谈 D.蒙特卡洛 26.Depreciation ____ expenses reported and ____ taxes paid. A. Increases, increases B. Increases, decreases C. Decreases, decreases D. Decreases, increases 26.折旧将会报告的支出并缴纳的税额。 A.增加;增加 B.增加;降低 C.降低;降低 D.降低;增加 27.You have used several cash flow methods to determine alternativeways of performing your current project. You know which of the following is true regarding the results ofyour cash flow analysis? A.Payback period and IRR will generally give you the sameaccept/reject decision. B.NPV and discounted cash flows will generally give you the sameaccept/reject decision. C.Payback period and discounted cash flows will generally give you thesame accept/reject decision. D.NPV and IRR will generally give you the same accept/reject decision. 27.你用到几种现金流方法来决定当前项目的替换方案,你的现金流分析的结果中,下面哪种陈述是正确的? A.回收期和内部收益率将产生相同的接收/拒绝的决策 B.净现值和贴现现金流将产生相同的接收/拒绝的决策 C.回收期和贴现现金流将产生相同的接收/拒绝的决策 D.净现值和内部收益率将产生相同的接收/拒绝的决策 28.You are a member of a large government project. You know that the contract insiststhat all equipment be manufactured in the United States. You see a senior member of yourteam replacing a company etching on a piece of equipment that was made in aforeign country. You confrontthis person, and he says he is following the project manager's orders. What should you do? A.Nothing; the project manager made the decision. B.Immediately report the violation to the government. C.Update your resume and look for another job. D.Talk to the project manager about the situation, and then decidewhat to do. 28.你是一个大型政府项目的成员。你知道合同规定所有设备必须在美国生产。你看到团队中一个资深成员正在用国外生产的一件设备来替换锈蚀的配件。你面对这个人提出问题,他说他按照项目经理的指令做的,你应该: A.不做什么,项目经理做的决策。 B.立即向政府报告。 C.更新你的简历找新的工作。 D.和项目经理交流这个情况,再作决定。 29.Which process is the foundation process within the Risk Managementknowledge area that helps establish risk management for all the processes thatfollow? A.Risk Monitoring and Control B.Risk Response Planning C.Risk Management Planning D.Risk Identification 29.在风险管理知识领域,哪一个过程有助于确立风险管理其他所有过程的管理? A.风险监控 B.风险应对规划 C.风险管理规划 D.风险识别 30. If EV = 145, PV = 162, AC = 138, BAC = 200, what is EAC when youbelieve current variances are not typical? A.201 B.190.4 C.193 D.200 30.如果EV=145,PV=162,AC=138,BAC=200,而且当前的偏差并非典型情况,那么EAC应为: A.201 B.190.4 C.193 D.200 31. You need to decide between two alternatives. You can either hire a contractorto build one of the project's deliverables, or you can buy the deliverable froman overseas supplier. Both options require acquisition, operating, and disposal coststhat you compare between the two alternatives to make a decision. What is this technique called? A.Value Engineering B.Life cycle costing C.Earned Value Management D.Financial analysis 31.你需要决定两个方案,你可以雇佣一个承包商来建设项目的交付成果,也可以从海外供应商那里购买。你需要比较两个方案的获取、运营和处置成本,以便作出决策。这种技术称为: A.价值工程 B.生命期成本 C.挣值管理 D.财务分析 32.You are managing a project team with several highly educatedprofessionals. One of yourteam members has requested to work from home two days a week. What should you do? A.Consult your human resource office to discuss company policies andprocedures first. B.To be fair, issue a policy that no team members can work from home. C.If the person is a good worker, approve the request. D.To be fair, issue a policy that all team members can work from home. 32.你管理着一个团队,有几个高级专家。你的一个队员希望一个星期在家工作两天,你怎么办? A.首先和人力资源办公室协商,讨论公司政策和程序 B.公平起见,发布一个不许在家工作的政策 C.如果他是个好员工,批准这个请求 D.公平起见,发布一个人人都可以在家工作的政策 33.You have received estimates for one of your project tasks asfollows: The pessimistic estimate is 24 days, the optimistic estimate is 18days, and the most likely estimate is 20 days. What is the standard deviation? A.1 B.0.33 C.0.67 D.1.5 33.你收到项目任务的估算如下,最悲观24天,最乐观18天,最可能20天,一个标准差是多少? A.1 B.0.33 C.0.67 D.1.5 34. One of the factors this motivation theory proposes is theimportance of friendship and a sense of camaraderie with other team members. Which theory does this describe? A. Expectancy theory B. Achievement theory C. Hygiene theory D. X theory 34.这一激励理论强调友谊和同志式的团队关系,这是什么理论? A.期望理论 B.成就理论 C.卫生理论 D.X理论 35.Which of the following statements is not true regarding the ScopeDefinition process? A.The Scope Definition process is critical for project success. B.The Scope Definition process improves cost, duration, and resourceestimate accuracy. C.The Scope Definition process allows the project manager to makeclear responsibility assignments. D.The Scope Definition process allows for constituent components to bedecomposed to the deliverable level. 35.关于范围定义,哪一种陈述是错误的? A.范围定义是项目成败的关键 B.范围定义改善了成本、历时和资源估算的准确性 C.范围定义使项目经理进行明确的职责分配 D.范围定义把项目组成部分分解到可交付成果层面 36. You are evaluating vendor proposals and using selection criteria inorder to choose a vendor. One of the criteria states that resources are required to havecivil engineering degrees and a minimum of three years of experience. Which of the following tools andtechniques does this question refer to? A.Weighting systems B.Contract negotiation C.Independent estimate D.Screening systems 36.你在选择某种评估标准来评估供应商建议书,其中有一条标准是要求供应商的资源要有民用建筑工程学位,以及至少三年以上经验。这一评估技术是: A.加权系统 B.合同谈判 C.独立估算 D.筛选系统 37. You are using information-gathering techniques to identify projectrisks. It's veryimportant that you keep biases to a minimum. Which technique should you use? A. Interviewing B. Delphi C. Peer review D. Nominal group 37.你在使用信息收集技术来识别风险,很重要的一点是要把偏见降低到最低水平,你应该使用什么技术? A.访谈法 B.德尔菲法 C.同事评审 D.名义小组 38. The following exchange took place at your last team meeting: “Idon't agree with Violet, and I'm not going to stop working on the secretformula just because she doesn't have the equipment in place for theexperiments.” What stageis this team in? A. Confrontation B. Norming C. Storming D. Withdrawal 38.上一次开会时发生了这样的交谈,“我不同意维埃特的看法,我不会因为她没有及时把实验设备安装到位,而稀里糊涂的停止我的工作。”这个团对处于什么阶段? A.面对 B.规范阶段 C.风暴阶段 D.撤退 39.While doing resource planning for your project, you visited thefunctional manager of engineering many times but she refused to supplyresources for the project. First, the excuse was that her department was too busy. The next time, the department wasundergoing a re-organization. This is causing your project to slip the schedule. The lack of which of the followingis the MOST probable reason for her lack of support? A.Gantt chart B.WBS C.Project charter D.RAM 39.在为你的项目编制资源计划时,你几次拜访工程部的职能经理,但她拒绝提供资源,第一次借口她的部门太忙,第二次说她的部门正在重组,这使得你的项目进度要延迟。缺少下列哪一个文件,是她对你支持不够的最可能原因? A.甘特图 B.WBS C.项目章程 D.职责分配矩阵 40.Given the following information, are the costs of the project higherthan budgeted or lower than budgeted? EV = 85, PV = 95, AC = 100. A.Lower than budgeted, because the result of the variance formula isnegative. B.Higher than budgeted, because the result of the variance formula isnegative. C.Higher than budgeted, because the result of the variance formula ispositive. D.Lower than budgeted, because the result of the variance formula ispositive. 40.根据下述信息,EV=85,PV=95,AC=100,项目的成本是高于还是低于预算? A.低于预算,因为偏差公式的结果为负数 B.高于预算,因为偏差公式的结果为负数 C.高于预算,因为偏差公式的结果为正数 D.低于预算,因为偏差公式的结果为正数 |