If the equilibrium price of a good decreases and the equilibrium quantity of the good decreases, we can conclude that

A、only demanders.

B、only suppliers.

C、government regulations.

D、both demanders and suppliers.

When the price of a bond is______the equilibrium price, there is an excess demand of bonds and the price will______.

A．above...rise

B．above...fall

C．below...fall

D．below...rise

Welfare economics explains which of the following in the market for televisions?

A.The government sets the quantity of televisions; firms respond to the quantity by charging a specific price.

B.The government sets the price of televisions; firms respond to the price by producing a specific level of output.

C.The market equilibrium price for televisions maximizes the total welfare of television buyers and sellers.

D.The market equilibrium price for televisions maximizes consumer welfare and minimizes producer profit.

What do business firms look at when they make decisions about prices and production?

A．The supply curve.

B．The demand curve.

C．The equilibrium point.

D．All of the above.

听力原文： A grass-roots group troubled by recent Republican triumphs and the influence of the Christian right is fighting back in Northern Virginia by defending the teaching of Darwinian evolution, a battleground in the national culture war. From Minnesota to Pennsylvania to Georgia to Texas, critics of modern Darwinism have battled to change textbooks and classroom approaches. Politicians, scientists and faith leaders on both sides have joined in the struggle. At hearings in May, the Kansas Board of Education, which has a conservative majority, supported teaching alternatives to evolution, a theory accepted by the vast majority of the scientific establishment. Evolution's newest defenders mostly are middle-class people with day jobs. Together, they call themselves the Message Group and describe themselves as" determined and balanced" voters worded about social conservatives. The Message Group do not hide the fact that they are starting from scratch. Seven months ago, a dozen members were learning one another's names. Five months ago, they were choosing a mission. They selected evolution after deciding that other issues, such as Social Security revisions, were well-covered by bigger, richer groups. The emerging debate over the teaching of science, they reasoned, was important, local and manageable, an area in which they could make a small impact--and if they got lucky, a big one.

What is the Message Group defending?

A．The theory of evolution.

B．The new classroom approaches.

C．The Christian right.

D．The government.

利用IS—LM模型分析政府支出减少对于不存在资本控制的小国经济的总需求、利率及其中央银行外汇储备的影响。如果中央银行通过出售一定量的债券使LM曲线移到足以冲抵政府开支减少的新的均衡位置，你的答案会有什么变化? Use the IS一LM model to analyze the effects of a decrease of government expenditures on aggre gate demand，the interest rate，and foreign reserves of the central bank in a small economy with no capital controls．How would your answer change if the central bank had matched the decrease inspending by selling bonds in an amount enough to shift the LM curve t0 its new equilibrium position? 注意：本章考虑的问题都是在固定汇率体制下。

If the engine does not start on air, it may be due to

A.low compression of the fuel pumps

B.incorrect timing of fuel pumps

C.the starting air valves stuck

D.air-locks in fuel oil pipeline

A、a. equal to equilibrium price.

B、b. above equilibrium price.

C、c. below equilibrium price.

D、d. none of the above; a price ceiling is never binding.

试为具有下述特征的经济推导均衡价格和产量； a．消费C=10—5P，投资I=200政府支出G=15，总供给Qs=5+P。 b．如果政府支出增至G=25。那么产量和价格会有什么变化? c．如果总供给Qs=10，那么a、b的答案会有什么变化? Derive the equilibrium price level and output for an economy with the following characteristics： a．Consumption is C=10—5P，investment is I=20，government spending is G=15，aggregate supply is Qs=5+P． b．What happens to production and prices if government spending raises to G=25? C．How would your answers to(a)and(b)change if aggregate supply were Qs=10?