单选题规模相当于摧毁西伯利亚森林的那一次在地球大气层中的陨石爆炸，威力大概相当于1200万吨级的核爆炸，一个世纪大概出现一次。由复杂的计算机程序控制的高度自动化的核导弹防御系统对于末预料到的情况的反应是无法预测的。如果以上关于由一个复杂的计算机程序控制的高度自动化的核导弹防御系统的陈述是正确的，可以最适当地得出以下哪一个结论？

单选题有人说：“最高明的骗子，可能在某个时刻欺骗所有的人，也可能在所有的时刻欺骗某些人，但不可能在所有的时刻欺骗所有的人。” 如果上述断定为真，而且世界上总有一些高明的骗子，那么下述哪项断定必定是假的?

单选题某家饭店中，一桌人边用餐边谈生意。其中，一个人是哈尔滨人，两个人是北方人，一个人是广东人，两个人只做电脑生意，三个人只做服装生意。 如果以上介绍涉及餐桌上所有的人，那么这一桌最少可能是几个人?最多可能是几个人?

单选题“不可能所有深圳人都很有钱。” 以下哪项断定的含义，与上述断定最为接近?

单选题一项产品要成功占领市场，必须既有合格的质量，又有必要的包装；一项产品，不具备足够的技术投入，合格的质量和必要的包装难以两全；而只有足够的资金投入，才能保证足够的技术投入。 以下哪项结论可以从题干的断定中推出? Ⅰ．一项成功占领市场的产品，其中不可能不包含足够的技术投入。 Ⅱ．一项资金投入不足但质量合格的产品，一定缺少必要的包装。 Ⅲ．一项产品，只要既有合格的质量，又有必要的包装，就一定能成功占领市场。

单选题在一项颜色对生产率作用的研究中，让100位工厂工人中的50位从其土褐色的工作间移到一间颜色明亮的工作间。这些工人和其余在土褐色工作间的工人都提高了生产率，可能是因为研究人员们在研究中同时对两个群体的工作都很感兴趣。 下面哪个，如果正确，会对上面提供的对研究结果的解释提出最多的质疑? A．50位移到颜色明亮的工作间的工人和留在土褐色工作间的工人执行的是完全一样的制造任务。 B．土褐色的工作间最多为65名工人提供足够的空间。 C．50位移到颜色明亮的工作间的工人与50位留在土褐色工作间的工人在年龄和培训水平上接近。 D．两个群体中几乎所有的工人都志愿移到颜色明亮的工作间。 E．许多移到颜色明亮的工作间里的工人报告说，相比颜色明亮的工作间，他们同样或更多地喜欢土褐色的工作间。

单选题俗语道：笨鸟先飞，早起的鸟儿有食吃。这些俗语蕴含着深刻的道理。如果你本来基础不好却又不刻苦努力，那你肯定不比别人更早的成功。 如果上述为真，以下哪项一定为假?

单选题科学家：已经证明，采用新耕作方法可以使一些经营管理良好的农场在不明显降低产量、甚至在提高产量的前提下，减少化肥、杀虫剂和抗生素的使用量。 批评家：并非如此。你们选择的农场是使用这些新方法最有可能取得成功的农场。为什么不提那些尝试了新方法却最终失败了的农场呢? 以下哪项陈述最恰当地评价了批评家的反驳?

单选题美国政府决策者面临的一个头痛的问题就是所谓的“别在我家门口”综合症。例如，尽管民意测验一次又一次地显示公众大多数都赞成建造新的监狱时，但是，当决策者正式宣布计划要在某地建造一新的监狱时，总遭到附近居民的抗议，并且抗议者往往总有办法使计划搁浅。以下哪项也属于上面所说的“别在我家门口”综合症？

单选题调查表明，一年中任何月份，18岁至65岁的女性中都有52%在家庭以外工作。因此，18岁至65岁的女性中有48%是全年不在外工作的家庭主妇。 以下哪项如果为真，最严重地削弱了上述论证?( ) A．现在离家工作的女性比历史上的任何时期都多。 B．尽管在每个月中参与调查的女性人数都不多，但是这些样本有很好的代表性。 C．调查表明将承担一份有薪工作作为优先考虑的女性比以往任何时候都多。 D．总体上说，职业女性比家庭主妇有更高的社会地位。 E．不管男性还是女性，都有许多人经常进出于劳动力市场。

单选题甲、乙、丙、丁、戊、己、庚排成一队。已知： (1)甲不是最前面的那个人。 (2)己和庚相邻。 (3)乙、丙两人间隔的人数与丁、戊两人间隔的人数相同。

单选题With U.S. companies sitting on an estimated $1.8 trillion in cash, it raises the question: Why aren't they deploying more of their hoard to expand their businesses? Or one might channel John Maynard Keynes to ask: Where have the "animal spirits" gone? Although capital spending in the U.S. is up 12 percent since the lows of early 2009, it's still running $88 billion below the peak of $1.34 trillion reached in the first quarter of 2008, says Joseph LaVorgna, chief U.S. economist at Deutsche Bank. He doesn't expect capital spending to catch up to that peak level and officially start to expand until the second quarter of 2011. (LaVorgna's definition of capital spending includes physical equipment and software, but not structures such as new stores or manufacturing plants. Spending on structures is about 2 percent of gross domestic product, one-third the size of capital sending's contribution to GDP, he says.) "The trend and momentum have definitely turned and it's just a matter of time before you see other companies give way to capital spending, and eventually that will result in hiring," says LaVorgna. But with spending running $88 billion below peak, he says employment "should be farther along than it is." Companies that have built up a lot of cash are starting to take some chances such as expanding into new markets, which requires hiring new workers, says John Challenger, chief executive officer of Challenger, Gray & Christmas, an employment consulting firm. U.S. companies have announced the hiring of 118,209 new employees through August, according to data collected by the firm. So who's stepping up to the plate? Some companies refuse to be cowed and are taking big, if calculated, chances, including ambitious capital projects, hiring new workers, and expanded investment in research and development, according to growth-oriented mutual fund managers contacted by Businessweek.com. If there's a common denominator, it's a perceived opportunity and confidence in sustainable demand, whether due to new trends in technology or to new markets that need certain products. Other names came from a list of the top-hiring U.S. companies through July 2010 compiled by Challenger, Gray & Christmas. "We don't spend capital unless we have a new contract to supply oxygen, nitrogen, or hydrogen to our customers," says James Sawyer, Praxair's chief financial officer. "Those are 15-year contracts with minimal take-or-pay clauses written into them, which ensure we will get a good return on our capital investment, regardless of how the rest of the economy is doing." Some younger outfits with entrepreneurial managers who have lived through a few business cycles think their companies may be able to steal a march on competitors more reluctant to spend, says Aram Green, manager of Clear Bridge Advisors Small Cap Growth Fund. "There's clearly been a decision by management that 'This is not the time to take our foot off the accelerator. In fact, it's time to push harder and further distance our product from the competition.'/

单选题在刚刚闭幕的高科技交易会上，免话费手机项目正式签约。这种新型的智能广告手机有望年内面世，“打手机不花钱”将不再是梦想。以下哪项断定最不可能与上述免话费手机的功能和特点相符? ( )

单选题如果你喝的饮料中含有酒精，心率就会加快。如果你的心率加快，就会觉得兴奋。因此，如果你喝的饮料中含有酒精，就会觉得兴奋。以下哪项推理的结构和上述推理最为类似?

单选题今天的中国，改革依然是人心所向，大势所趋。在新的历史时期，在现在成就基础上，经济社会要持续保持又好又快发展，就需要以更大的勇气、魄力和力度来推进改革。深化改革，只有这样，才能在用好机遇，化解风险中奋力闯出“深水区”，开创中国现代化的新境界。 由此可以推出，( )

单选题小张、小李、小王去参加奥林匹克竞赛。奥林匹克竞赛有数学、物理和化学三种，每人只参加一种。大张、大李、老王做了以下猜测。 大张：小张参加了数学竞赛，小李参加了物理竞赛。 大李：小王没参加物理竞赛，小李参加了数学竞赛。 老王：小张没参加数学竞赛，小李参加了化学竞赛。 如果他们的猜测都对了一半，则以下哪项为真? A．小张、小李、小王分别参加数学、物理和化学竞赛。 B．小张、小李、小王分别参加物理、数学和化学竞赛。 C．小张、小李、小王分别参加数学、化学和物理竞赛。 D．小张、小李、小王分别参加化学、数学和物理竞赛。 E．小张、小李、小王分别参加化学、物理和数学竞赛。

单选题A child may lean against a doorpost with his or her arms folded. To the onlooker, it may look like a benign posture—however, there may be a victimized child who understands that this is the bully's "shorthand" code of conveying the message: "Hand me your lunch as you walk by me, or else." Bullying may be expressed in many forms. Boys are generally targeted more than girls. Boys tend to use physical aggression when they bully .by hitting, kicking, and fighting. Girls, on the other hand, more often use exclusionary techniques to bully—a form of aggression often referred to as relational aggression. Girls often start rumors, form cliques to keep certain people out, and ignore other children in attempts to show dominance over another child. Many children who are victimized fit into one of two types: the passive victim, and the provocative victim. While people often feel bad about passive victims, provocative victims often elicit less compassion from others. Sometimes it appears that the provocative victim has "brought on" his or her own fate—but does any child deserve to be the target of repeated physical or verbal aggression? Why might so-called provocative victims actively participate in being the target of bullying: For example, are their provocative gestures simply a clumsy way of attempting to interact with others? One feels compassion for the inhibited child because he is reserved; a social misfortune in our society, but an aggressive child is given none of this. The dynamics of the bully/victim relationship need to be understood in a larger context (Pepler, Craig & O'Connell, 1999). It is not only the bully and the victim that is involved in a system of interaction: The bullying context includes multiple levels of the child's social environment. The bully may enlist the help of "henchmen" (those who assist the bully, but often do not have the initiative or leadership to initiate bullying). Also, bystanders (whether actively encouraging the bullying act or passively standing by) play a role in maintaining the pattern of bullying. Even the students who habitually flee the site of a bullying act play a role in maintaining the bully/victim interaction. In handling the situation, it is important not to focus only on the one or two students that are directly involved, but on the playground and school as a whole. Studies have shown that in order to break down the stability of peer bullying you must initiate change on many levels: Not only in teaching the bullied child how to assert himself or herself and to deflect attacks, but also to raise awareness about the problem of bullying and encourage the school community at large to take a united stance against bullying.

单选题在20世纪50年代，我国森林的覆盖率为19％，20世纪60年代为11％，20世纪70年代为6％。20世纪80年代不到4％，随着森林覆盖率的逐年减少，植被大量损失，削弱了土地对雨水的拦蓄作用，一下暴雨，水卷泥沙滚滚而下，使洪涝灾害逐年严重。可见，森林资源的破坏是酿成洪灾的原因。以下哪项使用的方法与题干最为类似?

单选题以下关于某案件的四个断定中，只有一个是真的： (1)如果甲作案，那么乙是同案犯。 (2)作案者是丙。 (3)作案者是甲。 (4)作案者是甲或丁。 这一真的断定是：

单选题科学发现表明，氯化碳在空气中的增加，是造成大气层中臭氧分子减少、臭氧层变薄的原因。20世纪80年代初，美国的科学家发现，大气层臭氧的含量和70年代初相比下降了32%。1982年，美国颁布并实施了禁止在喷雾器中使用氯化碳的法令。但是，到了90年代初，新的测试表明，大气层中的臭氧含量比80年代初又下降了31%。 以下哪项如果为真，能对上述现象提供解释? Ⅰ．80年代在日本和西欧，氯化碳的产生急剧上升。 Ⅱ．在80年代中期发生的全球气候变化，导致大气臭氧的衰变。 Ⅲ．80年代初，发现氯化碳有几个新的、能带来重大效益的用途。