单选题若N是X市的项目，且K把尽可能多的时间花在N，而在他所考察的其他项目上花尽可能少的时间，则下面哪一项正确?

单选题有一种心理学理论认为，要想快乐，一个人必须与另一个人保持亲密关系。然而，世界上最伟大的哲学家们孤独地度过了他们一生中的大部分时光并且没有亲密的人际关系。因此，这种心理学理论一定是错误的。 以下哪一项是上面的结论所必须假设的?

单选题Companies considering new cost-cutting manufacturing processes often compare the projected results of making the investment against the alternative of not making the investment with costs, selling prices, and share of market remaining constant. Which of the following, assuming that each is a realistic possibility, constitutes the most serious disadvantage for companies of using the method above for evaluating the financial benefit of new manufacturing processes? (A) The costs of materials required by the new process might not be known with certainty. (B) In several years interest rates might go down, reducing the interest costs of borrowing money to pay for the investment. (C) Some cost-cutting processes might require such expensive investments that there would be no net gain for many years, until the investment was paid for by savings in the manufacturing process. (D) Competitors that do invest in a new process might reduce their selling prices and thus take market share away from companies that do not. (E) The period of year chosen for averaging out the cost of the investment might be somewhat longer or shorter, thus affecting the result.

单选题所有的人都更喜欢他们容易分辨的颜色，而不是他们难以分辨的颜色。婴儿很容易分辨出明亮的颜色，但不能像成人那样分辨细微的暗色。色彩分明的婴儿玩具比暗色的同种玩具要好卖得多。 如果以上陈述为真，最有力地支持了以下哪个陈述?

单选题一家超市常常发现有顾客偷拿商品不付款，从而影响该超市的盈利。于是，该超市管理层痛下决心，在该超市安装监控设备，并且增加导购员人数，由此来提高该超市的利润率。 下面哪一项对于评价该超市管理层的决定最为重要? A．该超市商品的进价与卖价之比。 B．该超市每天卖出的商品的数量和价格。 C．每天到该超市购物的顾客人数和消费水平。 D．该超市因顾客偷拿商品所造成的损失，与运行监控设备、增加导购员的花费之比。

单选题The fossil record shows that the climate of North America warmed and dried at the end of the Pleistocene period. Most of the species of large mammals then living on the continent became extinct, but the smaller mammalian species survived. Which of the following, if true, provides the best basis for an explanation of the contrast described above between species of large mammals and species of small mammals?

单选题Fares on the city-run public buses in Greenville are subsidized by city tax revenues, but among the beneficiaries of the low fares are many people who commute from outside the city to jobs in Greenville. Some city councilors argue that city taxes should be used primarily to benefit the people who pay them, and therefore that bus fares should be raised enough to cover the cost of the service. Each of the following, if true, would weaken the argument advanced by the city councillors EXCEPT:

单选题企业竞争以效率为根本，而效率是以亲情为核心的东西。我国的各种制度不是要破坏亲情，而是要把亲情激发到最高点。 如果以下陈述为真，哪一项将最严重地削弱上述论证?

单选题提高教师应聘标准并不是引起目前中小学师资短缺的主要原因。引起中小学师资短缺的主要原因，是近年来中小学教学条件的改进缓慢，以及教师的工资增长未能与其他行业同步。 以下哪项如果为真，最能加强上述断定?

单选题对中国31个省市自治区的商人信任度的调查结果表明，一般本地人都认为本地人值得信任。如北京人为北京人打出的可信度分数是57.9，而为天津人打出的分数则是15。有一个地方例外，就是海南人自己并不信任海南人。 如果以下陈述为真，除了哪项之外，都能对上述的例外提供合理解释?

单选题为打击和杜绝考试作弊，某学校加强了监考。在刚结束的期末考试中，由李老师监考的甲班未发现一个学生作弊；而由张老师监考的乙班则查处了4个作弊学生。因此，和张老师相比，李老师显然没有认真、严格地履行监考职责。

单选题如果上述断定都是真的，下面哪项断定也一定是真的? Ⅰ．自行车不允许在高速公路上行驶。 Ⅱ．今天我的汽车仍然可能不被允许在高速公路上行驶。 Ⅲ．如果我的汽车的时速超过60公里，则当日肯定是逢双日。

单选题OSHA(职业安全与健康署)的成立是为了保护工人免遭事故及远离工作中的危险环境。在存在OSHA的情况下，与工作相关的事故数量实际上有所增加。这显示了该机构的无能。 下面哪个关于事故发生数量增加期间的陈述，如果正确，将最严重地削弱以上的论述?

单选题Hastings' contracture is a disorder of the connective tissue in one or both hands, most commonly causing loss of mobility. A survey of thousands of medical-insurance claims found that over 30 percent of people who had one hand operated on for Hastings' contracture underwent surgery a second time for this disorder within three years. Clearly, therefore, a single surgical treatment of Hastings' contracture is often ineffective at providing long-term correction of the disorder. Which of the following, if true, most seriously weakens the argument?

单选题有一商家为了推销其家用电脑和网络服务，目前正在大力开展网络消费的广告宣传和推广促销。经过一定的市场分析，他们认为手机用户群是潜在的网络消费的用户群，于是决定在各种手机零售场所宣传、推销他们的产品。结果两个月下来，效果很不理想。 以下哪项如果为真，最有助于解释出现上述结果的原因?

单选题Purebred cows native to Mongolia produce, on average, 400 liters of milk per year, if Mongolian cattle are crossbred with European breeds, the crossbred cows can produce, on average, 2,700 liters per year. An international agency plans to increase the profitability of Mongolia's dairy sector by encouraging widespread crossbreeding of native Mongolian cattle with European breeds. Which of the following, if true, casts the most serious doubt on the viability of the agency's plan?

单选题文学杰作是“文学上相互关联的”，也就是说，它们不应是为反映现实而作，而应是为反映其他文学作品而作。就一部作品在文学上相关的程度而言，它作为一面反映社会现实的镜子变得不那么清晰了。 上面的陈述最能支持下面哪个结论? A.就一部作品未能反映社会现实的程度而言，这部作品是与文学相关的。 B.想创作出一篇杰作的作家应避免被其他文学作品所影响。 C.一部文学作品如果是对一部准确反映社会现实的作品的反应，它就不是文学上相互关联的。 D.过去的文学杰作被怀疑是关于过去社会现实的信息来源。

单选题毫无疑问，未成年人吸烟应该加以禁止。但是，我们不能为了防止给未成年人吸烟以可乘之机，就明令禁止自动售烟机的使用，马路边上不是到处有避孕套自动销售机吗?为什么不担心有人从中买了避孕套去嫖娼呢? 以下哪项如果为真，最能削弱题干的论证?

单选题Kyle: The rate of highway fatalities per 100 million miles driven was about a third lower last year than ten years ago. The decrease is mainly attributable to greater use of seat belts and to less drinking of alcohol by drivers, but last year's sluggish economy also contributed, by curtailing driving. Lisa: The economy could not have been a factor, because even if fewer fatalities occur when fewer miles are driven, the number "per 100 million miles driven" is what you were discussing, and that figure would not fall merely because fewer miles were driven. Lisa's objection is based on