单选题经济学家认为影响消费的主要因素是

单选题假定货币供给量和价格水平不变，货币需求为收入和利率的函数，则收入增加时

单选题当法定准备率为20%，商业银行最初吸收的存款为3000货币单位时，银行所能创造的货币总量为

单选题下列选项中，属于资本深化的是 。

单选题在宏观经济学发展过程中起了最重要作用的一部著作是( )。 A．亚当·斯密的《国富论》 B．大卫·李嘉图的《赋税原理》 C．马歇尔的《经济学原理》 D．凯恩斯的《就业、利息和货币通论》

单选题在下列因素中， 是国民经济的漏出因素。

单选题 假如年初时失业率为5/%。根据奥肯定律，下列( )是错误的。 A、如失业率不变，实际GNP将增加3/% B、如该年平均失业率上升至7/%，实际GNP将下降1/% C、如该年平均失业率下降至7/%，实际GNP将上升1/% D、如该年平均失业率保持在5/%不变，实际GNP也将保持不变

单选题在下列项目中，( )不属于政府购买。

单选题关于现代货币数量论的叙述，错误的是 。

单选题经济学上的投资是指

单选题一般来说，一个完整的经济周期有 个阶段。

单选题如果你的账户余额有800亿美元，按照目前的存款利率续存，两年后你的账号将有898.88亿美元，那么目前的存款利率是( )。 A．6/% B．7/% C．8/% D．9/%

单选题Despite decades of scientific research, no one yet knows how much damage human activity is doing to the environment. Humans are thought to be responsible for a whole host of environmental problems, ranging from global warning to ozone depletion. What is not in doubt, however, is the devastating effect humans are having on the animal and plant life of the planet. Currently, an estimated 50,000 species become extinct every year. If this carries on, the impact on all living creatures is likely to be profound, says Dr. Nick Middleton, a geographer at Oxford University. " All species depend in some way on each other to survive. And the danger is that, if you remove one species from this very complex web of interrelationships, you have very little idea about the knock-on effects of other extinctions. " Complicating matters is the fact that there are no obvious solutions to the problem. Unlike global warning and ozone depletion—which, if the political will was there, could be reduced by cutting gas emissions—preserving biodiversity remains an intractable problem. The latest idea is " sustainable management " , which is seen as a practical and economical way of protecting species from extinction. This means humans should be able to use any species of animal or plant for their benefit, provided enough individuals of that species are left alive to ensure its continued existence. For instance, instead of depending on largely ineffective laws against poaching, it gives local people a good economic reason to preserve plants and animals. In Zimbabwe, there is a sustainable management project elephants. Foreign tourists pay large sums of money to kill these animals for sport. This money is then given to the inhabitants of the area where the hunting takes place. In theory, locals will be encouraged to protect elephants, instead of poaching them—or allowing others to poach them—because of the economic benefit involved. This sounds like a sensible strategy, but it remains to be seen whether it will work. With corruption endemic in many developing countries, some observers are skeptical that the money will actually reach the people it is intended for．Others wonder how effective the locals will be at stopping poachers. There are also questions about whether sustainable management is practical when it comes to protecting areas of great-bio-diversity such as the world's tropical forests. In theory, the principle should be the same as with elephants—allow logging companies to cut down a certain number of trees, but not so many as to completely destroy the forest. Sustainable management of forests requires controls on the number of trees which are cut down, as well as investment in replacing them. But because almost all tropical forests are located in countries which desperately need revenue from logging, there are few regulations to do this. Moreover, unrestricted logging is so much more profitable that wood prices from managed forests would cost up to five times more—an increase that consumers, no matter how " green " , are unlikely to pay. For these reasons, sustainable management of tropical forests is unlikely to become widespread in the near future. This is disheartening news. It's estimated these forests contain anything from 50 to 90 percent of all animal and plant species on Earth. In one study of a five-square-kilometer area of rain forest in Peru, for instance, scientists counted 1,300 species of butterfly and 600 species of bird. In the entire continental United States, only 400 species of butterfly and 700 species of bird have been recorded. Scientist Professor Norman Myers sees this situation as a gigantic " experiment we're conducting with our planet " . " We don't know what the outcome will be. If we make a mess of it, we can't move to another planet…It's a case of one planet, one experiment. /

单选题 在宏观经济学中，将价格水平变动引起利率同方向变动，进而使投资和产出水平反方向变动的情况称之为 A、实际余额效应 B、投资效应 C、产出效应 D、投入-产出效应 E、利率效应

单选题“征富济贫”可以

单选题下列属于耐用消费品的是( )。 A．一辆价值10万美元的汽车 B．一套150万美元的住宅 C．经久耐用的牛仔裤 D．汉堡包

单选题某经济体的均衡国民收入被150亿美元的新投资打破，假如不存在引致投资，投资乘数为4，那么在国民收入形成新的均衡时将会出现( )。 A．投资增加500亿美元，消费增加100亿美元 B．投资增加150亿美元，消费增加600亿美元 C．投资增加450亿美元，消费增加150亿美元 D．投资增加150亿美元，消费增加450亿美元

单选题假定货币供给量和价格水平不变，货币需求为收入和利率的函数，则收入增加时 。

单选题What's your earliest childhood memory? Can you remember learning to walk? Or talk? The first time you heard thunder or watched a television program? Adults seldom (1) events much earlier than the year or so before entering school, (2) children younger than three or four (3) retain any specific, personal experiences. A variety of explanations have been (4) by psychologists for this " childhood amnesia " . One argues that the hippocampus, the region of the brain which is (5) for formling memories, does not mature until about the age of two. But the most popular theory (6) that, since adults don't think like children, they cannot (7) childhood memories. Adults think in words, and their life memories are like stories or (8) —one event follows another as in a novel or film. (9) , when they search through their mental (10) for early childhood memories to add to this verbal life story, they don't find any that fit the (11) . It's like trying to find a Chinese word in an English dictionary. Now psychologist Annette Simms of the New York State University offers a new (12) for childhood amnesia. She argues that there simply aren't any early childhood memories to recall. According to Dr. Simms, children need to learn to use someone else's spoken (13) of their personal (14) in order to turn their own short-term, quickly forgotten (15) of them into long-term memories. (16) , children have to talk about their (17) and hear others talk about them—Mother talking about the afternoon (18) looking for seashells at the beach or Dad asking them about their day at Ocean Park. Without this (19) reinforcement, says Dr.Simms, children cannot form (20) memories of their personal experiences.

单选题所谓资本形成是指 。