03年考研英语一阅读全文答案解析

本文是2013年考研英语试卷阅读理解Part A的Text 2部分。本文主要讲述了网络隐私问题，就“在线行为广告”引发的争议展开论述，随后追溯了争议的相关解决方案。An old saying has it that half of all advertising budgets are wasted-the trouble is, no one knows which half.老话说的好，广告费的一半是浪费了的——问题是，没人知道哪一半浪费掉的。In the internet age, at least in theory, this fraction can be much reced.在互联网时代，至少在理论上，这一浪费的部分能够减少。By watching what people search for, click on and say online, companies can aim “behavioural” ads at those most likely to buy.通过观察人们搜索什么，点击什么，在网络上说什么，公司能够瞄准那些更容易购买的客户投放“行为”广告。26. It is suggested in paragraph 1 that “behavioural” ads help advertisers to:第一段表明，“行为”广告帮助广告商：[A] ease competition among themselves缓和他们之间的竞争[B] lower their operational costs降低运营成本[C] avoid complaints from consumers避免消费者的抱怨[D] provide better online services提供更好的网络服务答案：B。解析：第一句就指出了，广告费花费了有一半被浪费掉了。后面指出互联网时代广告费用大幅减少，因为公司（广告商）能够将“行为”广告投放给最有可能购买的人群。由此可知，“行为广告”能帮助广告商“降低运营成本”这句话最符合题意。In the past couple of weeks a quarrel has illustrated the value to advertisers of such fine-grained information: Should advertisers assume that people are happy to be tracked and sent behavioural ads? Or should they have explicit permission?在过去几周，一场争论表明这些精准信息对于广告商的价值：广告商应该假定用户乐于被追踪并且收到这些广告吗？或者应该获得用户明确的准许？In December 2010 America's Federal Trade Cornmission (FTC) proposed adding a "do not track "(DNT) option to internet browsers ,so that users could tell advertisers that they did not want to be followed .在2010年12月，美国联邦贸易委员会建议提出一个“禁止追踪”的选项加入到网络浏览器中，以便用户能告诉广告商他们不想被“追踪”。Microsoft's Internet Explorer and Apple's Safari both offer DNT ;Google's Chrome is e to do so this year. In February the FTC and Digltal Advertising Alliance (DAA) agreed that the instry would get cracking on responding to DNT requests.微软的IE浏览器和苹果的Safari浏览器提供了“禁止追踪”选项；谷歌的Chrome浏览器在今年准备提供这样的功能。2月，联邦贸易委员会和数字广告联盟同意该行业尽快对“禁止追踪”这一请求作出回应。27. “The instry” (Line 6, Para.3) refers to:“该行业”指的是：[A] online advertisers在线广告商[B] e-commerce conctors电子商务运营[C] digital information analysis数字信息分析者[D] internet browser developers网络浏览器开发商答案：D。解析：FTC和DAA一致认为the instry会对DNT要求迅速做出回应。前面又指出FTC提议在浏览器上添加DNT选项，可见这个提议的动作执行者在浏览器开发商。可见FTC和DAA提议的the instry就是浏览器开发商。On May 31st Microsoft set off the row: It said that Internet Explorer 10, the version e to appear windows 8, would have DNT as a default.微软在五月31日率先发起讨论，它表明随windows8一起发布的IE 10，将把“禁止追踪”选项设为默认状态。Advertisers are horrified .广告商慌神了。Human nature being what it is,most people stick with default settings.人性本质上是，大多数人还是坚持默认设置的。Few switch DNT on now,but if tracking is off it will stay off.很少人会打开DNT选项，但是如果“追踪”是关闭的那么它就一直关闭了。Bob Liodice,the chief executive of the Association of National Advertisers,says consumers will be worse off if the instry cannot collect information about their preferences.国家广告协会会长Bob Liodice 表示，如果这个行业不能收集消费者们的偏好信息，消费者的情况将会更糟。People will not get fewer ads,he says.“They’ll get less meaningful,less targeted ads.人们看到的广告不会更少，他们会得到更多的“无意义的”、更不精确的目标广告。28. Bob Liodice holds that setting DNT as a defaultBob Liodice坚称设置“禁止追踪”为默认选项[A] may cut the number of junk ads可能减少垃圾广告[B] fails to affect the ad instry对这个行业没有影响[C] will not benefit consumers对消费者不利[D] goes against human nature违反人性答案：C。解析：Bob Liodice指出了消费者的情况会更糟糕，收到的广告不会变少，反而会出现更多无意义的广告。所以C正确。It is not yet clear how advertisers will respond.还不清楚广告商怎么回应。Getting a DNT signal does not oblige anyone to stop tracking, although some companies have promised to do so.收到“DNT”信号并不能迫使企业去停止追踪，尽管一些企业承诺会这么做。Unable to tell whether someone really objects to behavioural ads or whether they are sticking with Microsoft’s default, some may ignore a DNT signal and press on anyway.由于不能分辨出用户是拒绝“行为”广告还是他们只是坚持微软的默认选项，一些企业可能忽略“禁止追踪”的信号并且继续追踪。29. which of the following is true according to Paragraph.6?根据第六段，下面哪一个是正确的？[A] DNT may not serve its intended purpose“禁止追踪”可能不能取得预期目标[B] Advertisers are willing to implement DNT广告商更希望执行“禁止追踪”选项[C] DNT is losing its popularity among consumers“禁止追踪”在消费者之中并不流行[D] Advertisers are obliged to offer behavioural ads广告商有责任提供“行为”广告答案：A。解析：公司收到DNT信号并不意味着一定要求停止追踪，而且由于他们不清楚消费者心理，可能也会对DNT默认信号加以忽略。由此，DNT并不能达到限制公司获取用户在线行为信息的目的。所以A合适。Also unclear is why Microsoft has gone it alone.并且也不清楚为什么微软一意孤行的发起行动。After all, it has an ad business too, which it says will comply with DNT requests, though it is still working out how.毕竟，它也有商业广告业务。据称这些业务也遵守“禁止追踪”选项设定。不过还在具体怎样实施还在研究当中。If it is trying to upset Google, which relies almost wholly on advertising，it has chosen an indirect method: there is no guarantee that DNT by default will become the norm.如果它是想让谷歌不高兴，谷歌的业务几乎全靠广告支持。它选择了一个不太直接的方式，没有保证说能将“‘禁止追踪’设为默认状态”成为行业规范。DNT does not seem an obviously huge selling point for windows 8-though the firm has compared some of its other procts favorably with Google's on that count before.“禁止追踪”看起来也不能成为Windows 8的巨大卖点，尽管此前这个公司将旗下一些产品与谷歌的进行了有利对比。Brendon Lynch, Microsoft's chief privacy officer, blogged:" we believe consumers should have more control." Could it really be that simple?Brendon Lynch，微软首席隐私官，在博客中写道：我们相信消费者将有更多的控制权。真的那么简单吗？30. The author's attitude towards what Brendon Lynch said in his blog is one of:作者对Brendon Lynch在博客中所说的态度是：[A] inlgence纵容[B] understanding理解[C] appreciation欣赏[D] skepticism怀疑答案：D。解析：Brendon Lynch说消费者应该拥有更多控制权，但是作者后面又反问：真的那么简单吗？可见，作者对Brendon Lynch的观点是怀疑的。

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People are, on the whole, poor at considering background information when making indivial decisions.人们大多在做决策的时候并不擅长考虑背景信息。At first glancethis might seem like a strength that __1_ the ability to make judgments which are unbiased by _2_ factors.1. A grants B submits C transmits D delivers2. A minor B external C crucial D objective乍一看，这似乎是个优势，使判断看起来不受外界信息所影响。解析：答案1：A。A grant:授予，赋予；赋予了某种特殊的能力，符合逻辑；B submits 提交，呈递：提交给上级C transmits发送，传送D delivers给指定的人或者目的地，或者发表（言论、看法）答案2：B。文中讲述的是这种能力不受外来因素影响，并非客观或者重要因素A minor 较小的B external 外部的C crucial 重要的D objective客观的But Dr Simonsohn speculated that an inability to consider the big _3_ was leading decision-makers to be biased by the daily samples of information they were working with.3. A issue B vision C picture D moment但是，Simonsohn博士推测，不能考虑全局使决定者因他们经手的日常信息样本所而产生了偏见。解析：答案3：C。big picture 整体情形与“背景信息”吻合big issue 重要议题；big vision 远见；big picture 整体情形；big moment重要时刻；_4_, he theorized that a judge _5_ of appearing too soft _6_crime might be more likely to send someone to prison __7_he had already sentenced five or six other defendants only to forced community service on that day.4. A Above all B On average C In principle D For example5. A fond B fearful C capable D thoughtless6. A in B for C to D on7. A if B until C though D unless例如，他提出理论，一名法官因为害怕对犯罪表现的过于宽容，更可能会把某个罪犯送到监狱，如果那天他已经把五六个被告人判处强制社区劳动之后。解析：答案4：D。本句以法官判案的案例来论证，所以选择D。A Above all 最重要的是，尤其，表强调B On average 平均C In principle 原则上，理论上D For example例如，表举例，有递进的关系答案5：B。法官在轻判之后害怕表现的心慈手软，后面会重罚，所以选择BA fond of喜欢B fearful of 害怕C capable 能够做……D thoughtless考虑不周的6：D。固定搭配 too soft on sth/with sb.对……同情的，心肠软的7：A。通过时态考查虚拟语气，考查上下文的衔接和逻辑。To __8__this idea, they turned their attention to the university-admissions process.8. A. test B.emphasize C.share D.promote为了检验这个想法，他们把注意力放在了大学招生录取过程中。解析：答案8：A。检验In theory, the ____9___ of an applicant should not depend on the few others___10____ randomly for interview ring the same day, but Dr Simonsohn suspected the truth was____11____.9. A.decision B.quality C.status D.success10. A.found B.studied C.chosen D.identified11. A.otherwise B.defensible C.replaceable D.exceptional理论上，一位申请人的成功不应该依赖于其他在同一天被随机抽取的参加面试的其他申请者，但是Simonsohn博士怀疑事实并非如此。解析：答案9：D。考生被成功录取，品质、地位没有关系。答案10：C。申请者不是被找到found,被研究studied或者被指认的identified，只能是随机抽取的。答案11：A。下文中说：申请者的分数会受到其他人的影响。所以，理论与实情不符合。选择A.otherwise不这样，并非如此的B.defensible 可辩解的C.replaceable 可代替的D.exceptional异常的，罕见的He studied the results of 9,323 MBA interviews _12_ by 31 admissions officers.12. A. inspired B. expressed C. concted D. secured他研究了31位招生负责人进行的9323场MBA面试。解析：答案12：C。组织，安排，执行。A. inspired 激励B. expressed 表达C. concted 执行D. secured 保护，努力得到The interviewers had _13_ applicants on a scale of one to five.13. A. assigned B. rated C. matched D. arranged面试官给给申请者分1到5个等级。解析：答案13：B。分级，rate合适A. assigned 分配，指派B. rated 分级C. matched 匹配D. arranged 安排This scale _14_ numerous factors into consideration.14. A. put B. got C. took D. gave这个分级将许多要素考虑其中。解析：答案14：C。固定搭配。take sth into consideration.将…考虑其中The scores were _15_ used in conjunction with an applicant’s score on the GMAT, a standardized exam which is _16_out of 800 points, to make a decision on whether to accept him or her.15. A. instead B. then C. ever D. rather16. A. selected B. passed C. marked D. introced这些分数然后被用来和申请者的GMAT分数联系起来（GMAT:从一个满分800分标准化的考试中评分），以决定是否接受他或她。解析：答案15：B。表顺承。A. instead 代替B. then 然后C. ever 曾经D. rather相反，而是答案16：C。为（测试等）打分。只能选MarkedA. selected 选择B. passed 通过，合格C. marked 评分D. introced介绍，引入Dr Simonsohn found if the score of the previous candidate in a daily series of interviewees was 0.75 points or more higher than that of the one _17__ that, then the score for the next applicant would_18_ by an average of 0.075 points.17. A below B after C above D before18. A jump B float C fluctuate D dropSimonsohn博士发现如果在同一天，一个申请人的分数比前一个高0.75分，那么下一个申请者的分数将平均下降0.075分。解析：答案17：D。句中逻辑the previous….before that…..the next，所以before答案18：D。前面是增加，后面自然是减少，所以选择drop。A jump 暴涨B float 漂浮C fluctuate 波动D drop下降，减少This might sound small, but to_19_the effects of such a decrease a candidate would need 30 more GMAT points than would otherwise have been _20__.19. A achieve B undo C maintain D disregard20. A necessary B possible C promising D helpful这个分数听起来很小，但是要抵消它的影响申请人需要在GMAT中比正常情况下高出30分。解析：答案19：B。使无效，废除A achieve 获得，实现C maintain 保持D disregard不理会答案20：A。这里指的是，正常情况下和受偏见影响下所需的分数的差异。而非可能的分数，有希望的分数，有帮助的分数。

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本文说明了水对于生长的植物的重要作用。第一段：Most growing plants contain much more water than all other materials combined.大部分生长的植物，其水的含量超过其他所有物质的含量总和。C. R. Barnes has suggested that it is as proper to term the plant a water structure as to call a house composed mainly of brick a brick building.C·R·巴恩斯认为，把植物叫做水结构就如同把主要用砖盖成的房子叫做砖建筑一样恰当。Certain it is that all essential processes of plant growth and development occur in water.当然，植物生长的一切必要过程都发生于水中。The mineral elements from the soil that are usable by the plant must be dissolved in the soil solution before they can be taken into the root.来自于土壤的矿物质在被植物根茎吸收之前，必须先溶解于水。They are carried to all parts of the growing plant and are built into essential plant materials while in a dissolved state.它们在溶解状态被输送到植物的全身并构成基本的植物材料。The carbon dioxide (CO2) from the air may enter the leaf as a gas but is dissolved in water in the leaf before it is combined with a part of the water to form simple sugars -- the base material from which the plant body is mainly built.空气中的二氧化碳能以气体的形式进入叶子，但在和一部分水结合生成单糖（构成植物体最基本的材料）之前也必须先溶于水。Actively growing plant parts are generally 75 to 90 percent water.植物生长活跃部分的含水量一般高达75-90%。Structural parts of plants, such as woody stems no longer actively growing, may have much less water than growing tissues.植物的结构部分（如生长不活跃的木质茎）的含水量可能大大少于生长活跃的组织。第二段：The actual amount of water in the plant at any one time, however, is only a very small part of what passes through it ring its development.但是，植物任何时候的实际含水量都只是其生长期间通过它全身水量的很小一部分。The processes of photosynthesis, by which carbon dioxide and water are combined -- in the presence of chlorophyll (叶绿素) and with energy derived from light -- to form sugars, require that carbon dioxide from the air enter the plant.借助叶绿素和光能量发生光合作用（二氧化碳和水结合）以形成单糖的过程要求二氧化碳从空气中进入植物。This occurs mainly in the leaves. The leaf surface is not solid but contains great numbers of minute openings, through which the carbon dioxide enters.这一过程主要发生在叶子上。叶子表面并非固体，而是有大量的小口。二氧化碳通过这些小口进入植物。The same structure that permits the one gas to enter the leaf, however, permits another gas -- water vapor -- to be lost from it.这些允许二氧化碳进入叶子的小口却让另一种气体——水蒸气散失。Since carbon dioxide is present in the air only in trace quantities (3 to 4 parts in 10,000 parts of air) and water vapor is near saturation in the air spaces within the leaf (at 80℉, saturated air would contain about 186 parts of water vapor in 10,000 parts of air), the total amount of water vapor lost is many times the carbon dioxide intake.由于二氧化碳在空气中的含量非常少（3-4‰），且叶子内部空气空间的水蒸气含量接近饱和状态（80F时，饱和状态下的每10000份空气中含186份水汽），所以，植物失去的水蒸气的量是吸收的二氧化碳量的许多倍。Actually, because of wind and other factors, the loss of water in proportion to carbon dioxide intake may be even greater than the relative concentrations of the two gases.实际上，因为风和其他因素的影响，损失掉的水和吸入二氧化碳的比甚至可能大于这两种气体的相对浓度。Also, not all of the carbon dioxide that enters the leaf is synthesized into carbohydrates (碳水化合物).另外，并非所有进入叶子的二氧化碳都可以被合成碳水化合物。19. A growing plant needs water for all of the following except .[A] forming sugars[B] sustaining woody stems[C] keeping green[D] procing carbon dioxide[分析] 本题考核知识点：事实细节题。第一段第六句（the carbon dioxide…mainly built）和第二段第二句说明：二氧化碳可以直接从空气中进入植物的叶子里，所以不需要水。[D]选项正确。同时这两句还说明：生成糖的过程需要二氧化碳先溶于水，然后和水结合，所以[A]不是正确选项。第一段最后一句说明：（尽管木质茎比活跃组织需要的水少得多），但还是需要一定量的水。所以，[B]非正确选项。[C]文中未提及。20. The essential function of photosynthesis in terms of plant needs is .[A] to form sugars[B] to derive energy from light[C] to preserve water[D] to combine carbon dioxide with water[分析]本题考核知识点：文中细节推理题。第一段第五句说明：二氧化的作用主要是生成植物体最需要的材料——单糖。第二段第二句说明：植物的光合作用（二氧化碳和水结合）形成单糖。所以，光合作用能够提供植物需要的（单）糖。[A]为正确选项。[B]的干扰来自于第二段第二句，但该句提到的是从光中获取能量是光合作用的条件之一，而不是反过来通过光合作用去获取能量。[C]文中未提及。[D]是光合作用的过程，而不是作用。21. The second paragraph uses facts to develop the essential idea that.[A] a plant efficiently utilizes most of the water it absorbs[B] carbon dioxide is the essential substance needed for plant development[C] a plant needs more water than is found in its composition[D] the stronger the wind, the more the water vapor loss[分析] 本题考核知识点：段落主旨题。解此题需要分析第二段的结构。本段第一句为段落主题句：植物的含水量只是其需水量很小的一部分。然后用事实说明为什么会出现这种情况（植物叶子允许二氧化碳进入，却让水蒸气散失。再加上风和其他因素的作用，大部分的水都损失掉了）。所以，[C]为正确选项。[A]“有效利用水”不是本文涉及的内容；[B]只在第一段有所提及。第二段提到风等因素造成水的损失，但并未提到风的大小与损失的水蒸汽的量相关。所以，[D]排除。22. According to the passage, which of the following statements is TRUE?[A] The mineral elements will not be absorbed by the plant unless they are dissolved in its root.[B] The woody stems contain more water than the leaves.[C] Air existing around the leaf is found to be saturated.[D] Only part of the carbon dioxide in the plants is synthesized.[分析] 本题考核知识点：文中多处细节理解题。文章第二段最后一句指出：并非所有进入叶子的二氧化碳都被合成了碳水化合物。这说明[D]选项正确。[A]的干扰来自于第一段第四句。该句说明，来自于土壤中的矿物质元素只有先溶于“土壤溶液”才能被“根部”吸收，而非溶解于“根部”。[B]与原文内容相反：从第一段最后一句可知，生长不活跃的木质茎含水量可能远远小于生长活跃的叶子。[C]与文中内容不符：第二段第五句给出的信息是：“叶子内部”空气中的水蒸气含量“接近”饱和状态，而非“叶子周围”的空气“处于”饱和状态。23. This passage is mainly about.[A] the functions of carbon dioxide and water[B] the role of water in a growing plant[C] the process of simple sugar formation[D] the synthesis of water with carbon dioxide[分析] 本题考核知识点：文章主旨题。本文第一段首先通过类比开门见山地说明水对于生长中植物的重要作用。然后通过水对植物生长的各种功能（溶解矿物质元素、溶解二氧化碳并和二氧化碳结合生成单糖）说明植物生长中的一切重要过程都离不开水。第二段用事实说明：（尽管植物含水量相当高），但植物生长所需要的水远远大于其本身所所含有的水。所以，整篇文章说围绕的中心是：水对于植物生长的重要作用。[B]为正确选项。考生误选[A]、[C]、[D]都是因为对光合作用在全文中作用的理解错误：文中提到关于二氧化碳（光合作用）是为了用事实说明水对植物生长的重要作用，而并非为了说明二氧化碳本身或光合作用（生成单糖）的作用，所以[A]、[C]都不正确；同样也不是为了说明光合作用的过程，所以[D]错误。

The American economic system is organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be proced by spending their money in the marketplace for those goods and services that they want most. 美国的经济体制是在基本上由私营企业组成并以市场为导向的经济基础上建立起来的。在这个经济体制里，需要生产什么主要是由消费者在市场上花钱购买他们最需要的商品和服务决定的。Private businessmen, striving to make profits, proce these goods and services in competition with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are proced.为了获取利润，私有企业主之间互相竞争，来生产这些产品和提供这些服务。在竞争的压力下运作，追求利润的动机很大程度上决定了生产商品和提供服务的方式。Thus, in the American economic system it is the demand of indivial consumers, coupled with the desire of businessmen to maximize profits and the desire of indivials to maximize their incomes, that together determine what shall be proced and how resources are used to proce it.因此，在美国的经济体制中，消费者个人的需求、商人对获取最大利润的追求以及消费者渴望最大化自己的收入，所有这些共同决定了应该生产什么和如何利用资源去生产这些产品。An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by procers.在以市场为导向的经济中的一个重要因素是反映消费者需求以及生产者对消费者需求作出反应的机制。In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-procers.在美国经济中，这一机制是由价格体制提供，在价格体系中，价格随消费者的相对需求和出售者及生产者的供应情况而上下浮动。If the proct is in short supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market.如果产品相对供不应求，价格就会抬升，从而使一些消费者从市场上消失。If, on the other hand, procing more of a commodity results in recing its cost, this will tend to increase the supply offered by seller-procers, which in turn will lower the price and permit more consumers to buy the proct.另一方面，如果商品的大量生产导致成本的降低，这会促使销售商和生产商供给的增加，从而反过来导致价格下降，致使更多的消费者购买产品。Thus, price is the regulating mechanism in the American economic system.因此，价格是美国经济体制中的调节机制。The important factor in a private-enterprise economy is that indivials are allowed to own proctive resources (private property), and they are permitted to hire labor, gain control over natural resources, and proce goods and services for sale at a profit.私有企业经济的一个重要因素是允许个人拥有生产资料（私有财产），允许他们雇用劳动力，控制自然资源，以及生产产品、提供服务以获取利润。In the American economy, the concept of private property embraces not only the ownership of proctive resources but also certain rights, including the right to determine the price of a proct or to make a free contract with another private indivial.在美国经济中，私人财产的概念不仅仅包含对生产资料的所有权，还包含某些其他权利，其中包括确定产品的价格或与另一私营者签订自由合同。11.[答案]D[解析]本题考核的知识点是：句题题。先定位到第一段末句。解题的关键是看对maximize的理解。原文所在句“coupled with the desire of businessmen to maximize profits and the desire of indivials to maximize their incomes”将生产者和消费者的愿望对照来说。句中的两个maximize平衡并列，作用、意义完全相同。因此知道maximize在第一处的意义即可知道第二处之意。众所周知，商人总是想用最少的投入取得最大的利润，这就是maximize的意义。由此可知，消费者希望使一定的收入取得最大限度的效益，即用现有收入买到更多更好的商品。而[D]选项恰是此意。[A]和[B]选项未在原文提及。[C]选项反映的是劳资双方的关系，而不是生产者与消费者之间的关系。12.[解析] 本题考核的知识点是：事实细节题。[D]选项就是该段第二句“prices rise and fall in response to relative demands of consumers and supplies offered by seller-procers”的概括，为正确答案。[A]选项在这两句中并未涉及。注意文中第一句的mechanism意为“机制”，而该选项中的mechanized意为“机械化”，二者含义不同。误选[B]选项的考生是对该段首句的语法成分分析错误。它是一个省略句，补全后应该是“An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and (by which consumer demands can be) responded to by procers”。由此可知，消费者通过这一机制表达他们的需求，而生产者则通过这一机制对他们的需求作出反应。[B]选项理解成consumer demands can be expressed…by procers。[C]选项与第二句“供求关系决定价格”不符，也应该排除。此题亦可通过经济常识解答。注意：干扰选项经常使用原文中出现的词语或类似的结构伪造，所以对那些出现了原词的选项一定要仔细辨认真伪。13.[答案]A[解析] 本题考核的知识点是：段落主旨题。题干要求考生回答私营企业经济的特点，即第三段的主题。该段只有两句。第一句强调的是私营企业最重要的因素是个人拥有生产资料（私人财产）、允许个人雇用劳动力和控制自然资源。第二句是指私人财产的概念还包含某些其他权利，如：产品价格的决定权或与其他私有个体的自由签约权。尤其第二句的not only… but also…更表明了此段主旨。[A]选项是对上述内容的概括，为正确答案。而[B]、[C]和[D]选项虽然都在第三段述及，但是都是[A]选项下的具体内容，缺乏概括性，不应该入选。命题意图要求考生区分段落细节与段落中心是局部与整体的关系。14.[答案]C[解析] 本题考核的知识点是：文章主旨题。解此题需要了解文章各段的主旨。第一段论述美国经济体制的构成；第二段介绍市场经济的运行方式；第三段介绍私营经济的特点。后两段是对第一段的进一步论述。由此可见，美国经济体制的构成和运作是本文论述的中心。[C]选项正反映了这一主题。[A]、[B]和[D]选项都在文中有所涉及，但都是具体细节，比较片面，应该排除。此题还可以通过直接对选项进行比较排除来解题。[A]、[B]和[D]都在文中述及，分属于三个独立的、不同的概念。其中任意一个可代表其他两个，而[C]选项概括性强，可以包括[A]、[B]和[D]，故[C]为正确答案。

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