单选题吉芬商品的出现是因为( )。

单选题资本主义经济危机的实质是（ ）的危机。

单选题某甲在3年前存入银行1000。头两年，她以5％的年利率收益，第三年，以6％收益。那么现在，她的账户中有( )。

单选题资本主义工资的实质是（ ）。

单选题序数效用理论认为，不同消费者从相同商品中获得的效用大小( )。

单选题在信用体系中占主导地位的信用是（ ）。

单选题( )是用来计算CPI的指标商品。

单选题敏感性分析的目的是从各（ ）中找出敏感因素，判断敏感因素发生不利变化时投 资方案的承受能力。

单选题货币流通规律的基本内容是（ ）。

单选题Everyday some 16m barrels of oil leave the Gulf through the Strait of Hormuz. That is enough to fill a soft-drink can for everyone on earth, or to power every motor vehicle on the planet for 25 miles (40kin). Gulf oil accounts for 40% of global trade in the sticky stuff. More important, it makes up two-thirds of known deposits. Whereas at present production rates the rest of the world's oil reserves will last for a mere 25 years, the Gulf's will last for 100. In other words, the region's strategic importance is set to grow and grow. Or at least so goes the conventional wisdom, which is usually rounded out with scary talk of unstable supplies, spendthrift regimes and a potential fundamentalist menace. Yet all those numbers come with caveats. A great deal of oil is consumed by the countries that produce it rather than traded, so in reality the Gulf accounts for less than a quarter of the world's daily consumption. As for reserves, the figures are as changeable as a mirage in the desert. The most comprehensive research available, conducted by the US Geological Survey, refers to an "expected" total volume for global hydrocarbon deposits that is about double current known reserves. Using that figure, and throwing in natural gas along with oil, it appears that the Gulf contains a more moderate 30% or so of the planet's future fossil-fuel supplies. Leaving out the two Gulf states that are not covered in this survey--Iran and Iraq--the remaining six between them hold something like 20% of world hydrocarbon reserves, not much more than Russia. All the same, it is still a hefty chunk; enough, you might think, to keep the people living atop the wells in comfort for the foreseeable future. But you might be wrong. At present, the nations of the Gulf Cooperation Council have a combined national income roughly equal to Switzerland's, but a population which, at around 30m, is more than four times as big. It is also the fastest-growing on earth, having increased at nine times the Swiss rate over the past quarter-century. Meanwhile the region's share of world oil trade has fallen, as has the average price per barrel. As a result, the income per person generated by GCC oil exports has been diminishing since the 1970s. True, surging demand from America and Asia has recently boosted the Gulf's share of trade, but the medium-term outlook for oil pries remains weak. Combined with continued growth in oil consumption, this should create sustained upward pressure on prices. And high oil prices will speed the search for alternatives. Who knows, in 20 years' time fuel cells and hydrogen power may have started to become commercial propositions.

单选题对完全垄断厂商来说，( )。

单选题下列各式中，不等于零的是______．A．B．C．D．

单选题某工人在工资率为每小时2美元的时候每周挣80美元，每小时3美元的时候每周挣105美元，由此可以断定( )

单选题某设备的核定价值为8000元，使用年限为10年，期末残值为零，用双倍余额递减法计算的第3年折旧额为（ ）元。

单选题设函数y=f(x)在x0点处可导，Δx，Δy分别为自变量和函数的增量，dy为其微分且f"(x0)≠0，则=______．

单选题某月内，X商品的瞢代品的价格上升和互补品的价格上升，分别引起X商品的需求变动量为50单位和80单位，则它们共同作用下该月X商品需求数量( )

单选题设向量组(Ⅰ)α 1 ，α 2 ，…，α s ，其秩为r 1 ，向量组(Ⅱ)β 1 ，β 2 ，…，β s ，其秩为r 2 ，且β i (i=1，2，…，s)均可以由α 1 ，α 2 ，…，α s 线性表示，则______．

单选题认为在长期与短期中都不存在菲利蒲斯曲线所表示的失业率与通货膨胀率之间交替关系的经济学派是（ ）

单选题某司机驾驶违章，交警说：“对你要么扣驾照，要么罚款。”司机说：“我不同意。”那么，按照司机的说法，以下哪项断定是他在逻辑上是必须同意的?

单选题在完全竞争市场中，在厂商的停止营业点上，应该有（ ）。