单选题经济学家认为政府对能源利用方面的管制是多余的，市场完全可以自行调节能源的供需矛盾。如果能源真的紧张，那么反映在市场上，能源价格自然会上涨。而能源价格的上涨，一方面因为使用成本提高，人们减少了对能源的使用；另一方面因为利润增加，使得能源供应商增加供给。 以下哪一项如果为真，能对上述论述提出最有力的质疑?

单选题Like every dog, every disease now seems to have its day. World Tuberculosis (infections disease in which growths appear on the lungs) Day is on Saturday March 24th. Tuberculosis was once terribly fashionable. Dying of "consumption" seems to have been a favorite activity of garret-dwelling 19th-century artists, h has, however, been neglected of late. Researchers in the field never tire of pointing out that TB kills a lot of people. According to figures released earlier this week by the World Health Organization, 1.6 million people died of the disease in 2005, compared with about 3m for AIDS and l m for malaria. But it receives only a fraction of the research budget devoted to AIDS. America's National Institutes of Health, for example, spends 20 times as much on AIDS as on TB. Nevertheless, everyone seems to getting in on the TB-day act this year. The Global Fund an international organization responsible fur fighting all three diseases but best known for its work on AIDS, has used the occasion to trumpet its tuberculosis projects. The fund claims that its anti-TB activities since it opened for business in 2002 have saved the lives of over 1m people. The World Health Organization has issued a report that contains some good news. Although the number of TB cases is still rising, the rate of illness seems to have stabilized; the caseload, in other words, is growing only because the population itself is going up. Even drug companies are involved. In the nm-up to the day itself, Eli Lilly announced a $ 50m boost to its MDRTB Global Partnership. MDR stands for multi-drug resistance, and it is one of the reasons why TB is back in the limelight. Careless treatment has caused drug-resistant strains to evolve all over the world. The course of drugs needed to clear the disease completely takes six mouths, anti persuading people lo stay that course once their symptoms have gone is hard. Unfortunately, those infected with MDR have to be treated with less effective, more poisonous and more costly drugs. Naturally, these provoke still more. non-compliance and thus still more evolution. The other reason TB is back is its relationship to AIDS. The (global Fund's joint responsibility for the diseases is no coincidence. AIDS does not kill directly. Rather, HIV, the virus that causes it, weakens the body's immune system and exposes the sufferer to secondary infections. Of these, TB is one of the most serious. It kills 200 000 AIDS patients a year. However, some anti-TB drugs interfere with the effect of some anti-HIV drugs. Conversely, in about 20% of cases where a patient has both diseases, anti-HIV drugs make the tuberculosis worse. The upshot is that 125 years after human beings worked out what caused TB, it is still a serious threat.

单选题生理学家发现，人类掌管记忆和思维等高级认知功能的大脑皮质在正常情况下有六层。如果胎儿缺乏一种名为“Cdk5”的酶，大脑皮质的发育就会变得极为缓慢，无法最终形成正常大脑皮质的六层结构，从而严重影响儿童认知发展。因此一些医药界人士推测，利用这一发现，有望研发出药物，普遍提高学生的学习能力。 如果以下各项为真，哪一项不能质疑上述推测?

单选题假设一个柯布—道格拉斯生产函数，资本(K)和劳动(N)的贡献都是1／2，并且A=1。如果劳动增长率是n=0．06，折旧率是d=0．04，储蓄率是s=0．2，那么稳态的资本劳动比率为( )。

单选题父母不可能整天与他们的未成年孩子待在一起。即使他们能够这样做，他们也并不总是能够阻止他们的孩子去做可能伤害他人或损坏他人财产的事情。因此，父母不能因为他们的未成年孩子所犯的过错而受到指责或惩罚。 如果以下一般原则成立，哪一项最有助于支持上面论证中的结论?

单选题整个信用体系的基础是（ ）。

单选题设f(x)的一个原函数为2x，则f"(x)=______．A．2x(ln2)2B．2xln2C．2xD．

单选题The telecommunications, pharmaceutical, and airline industries all have undergone radical changes in recent years. Pharmaceutical companies, which once sold drugs to the doctors that dispensed them, switched to the solution-selling method and started dealing with health-care companies. And many major airlines consolidated at the same time that low-cost firms like Jet Blue entered the market. In each of these industries, the game changed, and with new rules came new ways to win. That is the premise of Harvard Business School's "Changing the Game. Negotiation and Competitive Decision Making." The program, which covers not only deal-making but also topics as diverse as online auctions and strategic partnerships, "is for companies that are going through fundamental change in the way things are done," says Max Bazerman, program chair and professor of business administration at the school. This is not a program for novices, says Bazerman; most participants have already attended a general negotiation program. In "Changing the Game," participants learn to understand their thought processes regarding negotiation, to compare rational and intuitive decision-making strategies, and to identify common mistakes made by even the most experienced professionals. By focusing on competitive environments, the program draws on some of the most advanced concepts from the emerging areas of behavioral economics, behavioral decision research, and behavioral finance. Participants engage in simulated negotiations that highlight the tension between creating and assessing value, and learn how to think about both simultaneously. The soup-to-nuts simulations encompass preparation, team building, negotiating, and feedback, as well as the development of a conceptual structure for thinking about negotiations more rationally. Participants then apply that structure in their critiques of several large-scale negotiation cases. Ultimately participants apply their newly-honed analytic skills to their own companies and critique of past negotiations. Negotiations can take many forms, of course. Bazerman notes that auctions are becoming increasingly common. Thanks to a renewed focus on driving clown costs, auctions have emerged as a valuable way for buyers to exert maximum leverage (although the course offers advice to sellers as well). Here again, coursework focuses both on analysis of case studies and on simulations that give participants a chance to roll up their sleeves and put themselves to the test. "Max's approach is more pragmatic than other programs I've taken," says Gerry Dully, senior vice president of global marketing and logistics at Methanex, a producer of methanol based in Vancouver. "Looking at my prior experience, I could see what mistakes I made, and I'm more conscious of them now. The course had a profound impact on how I've modified my behavior in negotiating situations. /

单选题X方案经济效果的标准差是1.5，Y方案经济效果的标准差是1.4，如果X、Y两方案的经济效果的期望值相等，则两方案的风险大小关系为（ ）

单选题长期平均成本曲线LAC呈U形的原因与（ ）。

单选题如果某厂商增加1单位的劳动量可以减少5单位的资本，则仍要生产出同样的产出量，则MRTSLK为（ ）

单选题设有向量组α 1 =(1，-1，2，4)，α 2 =(0，5，1，2)，α 3 =(3，0，7，4)，α 4 =(1，-2，2，0)，α 5 =(2，1，5，10)，则该向量组的极大线性无关组为______．

单选题某公司招聘总经理秘书，程蔷、朱莉、李萍、薛芳四人前去应聘。该公司规定的录用条件如下： ①有硕士研究生学历； ②英语口语会话熟练； ③有两年以上文秘工作经验。 现在已知： (1)程蔷和朱莉两人中有一人只受过本科教育； (2)朱莉和薛芳的最后学历相同； (3)李萍和薛芳英语会话能力相仿。 每个人至少符合一个条件，有三人符合条件①，两人符合条件②，一人符合条件③。 经考核，四人中只有一人符合要求被录用。这个人是哪一位?

单选题第二次世界大战后发达资本主义国家实施经济调控的理论基础是（ ）。

单选题同时位于IS曲线和LM曲线上方的点表示（ ）

单选题下列生产资料属于劳动对象的是( )

单选题下列说法错误的是( )。

单选题南京某医院整形美容中心对接受整形手术者进行统计调查。调查表明，对自己的孩子选择做割双眼皮、垫鼻粱等整形手术绝对支持的家长高达85%。经过子女做思想工作同意孩子整形的占10%。家长对子女整形的总支持率达到95%，比两年前50%的支持率高出了近一倍。 以下哪一项陈述最适合作为从上面的论述中推出的结论?

单选题设两条曲线在点处相切，则______．A．B．C．D．

单选题如果一偏好的无差异曲线凹向原点，则可能是因为( )。