单选题在国民收入核算账户中，不能列入投资项目的是( )。

单选题Short of money? Need an instant loan? Since the early 1990s your best bet has been to go to the low-rent end of town and find an appointed loan-shop. There you can borrow money in small amounts, generally not much more than $500, against your post-dated pay-cheque. You will be charged around $15 interest for every $100 you borrow--and that is per month. For many people, there is no alternative. Banks refuse to make small loans because there is no money in it, and completely unregulated lending, via the internet or loan sharks, is too alarming. According to the Community Financial Services Association, an advocacy group for the industry, most borrowers are responsible and pay off their loans in a timely manner. But some don't. The Centre for Responsible Lending, a consumer group, says that many borrowers routinely roll over their loans. This quickly brings them into debt traps. A typical borrower may end up paying $793 for a $325 loan. The centre estimates that payday loans cost Americans $4.2 billion a year in interest and fees. The industry thrives, in large part, because it operates mostly outside state usury laws that prohibit excessive interest rates. Its spokesmen say lenders need such exemptions to make a profit on their basic service, small loans. Lenders say that their returns would amount to pennies on the dollar if interest rates were capped. In fact, they say, such restrictions would put them out of business. And that is exactly what many of their opponents would like to see--particularly when it comes to loans made to the families of soldiers. In one of the last acts of the Republican Congress, payday lenders were restricted to interest rates of 36% on loans to military personnel and their spouses. The Pentagon is worried that uniformed personnel, especially those serving in Iraq, have been losing their security clearances because of excessive debt at home. This, among other things, was leading to the costly reassignment of highly trained troops, such as communications experts, to ordinary low-skill jobs. Robert Frank, an economist at Cornell University, wrote recently in the New York Times that the industry -- not unlike the sub-prime mortgage sector -- is a beneficiary of the sweeping deregulation of the financial-services industry that has made credit more accessible. Its adverse consequences, he says, were" completely predictable". Once poor people get in over their heads, they will borrow themselves into bankruptcy if the law permits; and" if we are unhappy about that, the only solution is to change the rules./

单选题在下列情况中应该计入当年国民生产总值的是（ ）

单选题设y=y(x)由方程x3-ax2y2+by3=0确定，且y(1)=1，x=1是驻点，则______．A．a=b=3B．C．D．a=-2，b=-3

单选题若两种商品X和Y的需求交叉价格弹性系数为-3，则( )。

单选题桓公问：“为何说寡人读的是古人的糟粕?”轮扁说：“依我的经验看，斫车轮，轮孔做得稍大就松滑而不坚固，做得稍小就滞涩难入，要想做得不大不小，不松不紧，必须得之于心而应之于手。有高超的技术存在其中，却无法用语言传达，我无法教给我儿子，所以，我都七十岁了还得斫轮。古人已经死了，他们所不能言传的精华也跟着消灭了，那么您所读的就是古人的糟粕了。” 以下哪一项陈述是轮扁的议论所依赖的假设?

单选题生产可能性曲线是指( )。

单选题下列命题中，正确的是______．

问答题简述引起通货膨胀的原因

问答题已知消费者对某种商品的需求函数为Q=100-2P，写出相应的总收益函数和边际收益函数。在什么价格水平上，需求价格弹性系数为1?

问答题规模报酬的递增、不变和递减这三种情况与可变比例生产函数的报酬的递增、不变和递减这三种情况的区别何在?“规模报酬递增的厂商不可能也会面临要素报酬递减的现象”，这个命题是否正确?为什么?

问答题说明税收归宿如何受到供求弹性的影响。

问答题设函数，其中fg均可微，求

问答题为什么短期边际成本曲线代表完全竞争厂商的供给曲线?

问答题假设经济中的菲利普斯曲线为：π=πt-1-0.5(u-0.06)，(1)该经济的自然失业率是多少?(2)为使通货膨胀减少5个百分点，必须有多少周期性失业?

问答题完全竞争市场

问答题辨析：劳动生产率提高会提高商品价值总量和商品数量。

问答题已知消费函数为C=200+0．5Y，投资函数为I=800-5000r，货币需求函数为L=0．2Y-4000r，货币供给为M=1000 (1)写出IS曲线方程； (2)写出LM曲线方程； (3)写出IS-LM模型的具体方程，并求解均衡国民收入(Y)和均衡利息率(r)。

问答题假定某消费者的效用函数为U(x1，x2)=min{ax1，x2)，其中a为大于零的常数，其设x1，x2的价格分别为p1，p2，消费者收入为I。 (1)请画出该消费者的无差异曲线，并说明相应商品的边际替代率； (2)试求出x1商品的需求函数； (3)请说明x1商品的收入效应、替代效应和总效应； (4)请画出相应的收入—消费线(ICC)和x1商品的恩格尔曲线。

问答题经常项目差额模型的第二定理