单选题The author beheves that__________．
A．the divisions among people result from their property
B．a high-caliber science student graduates from a ordinary high school
C．the small alterations should be done immediately
D．the society’s help to inner-city schools is inadequate
作者认为：选项A：人以财产分类。错误，文章没有体现。选项B：高才理工类学生毕业于普通高中。文章第一段说学生从那样的高中毕业都很困难，更别提要成为高才理工或工程类学生。
选项C：应该立刻进行小的改变。文章没提到，只是在最后一段的第一句说现在报纸上充斥的这些关于小改变新建议的提法不足以改变这种多年涣散、颓废、消沉的学校结构体系。选项D：社会对贫民区学校的帮助是不足的。正确，第三段第一句说了：Although those measures can help，they ale not en ough 。
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3根据下面资料，回答题
Many phrases used to describe monetary policy, such as "steering the economy to a soft land-ing" or "a touch on the brakes", makes it sound like a precise science. Nothing could be further from the truth. The relation between interest rates and inflation is uncertain. And there are long,variable lags before policy changes have any effect on the economy. Hence the analogy that likens the conduct of monetary policy to driving a car with a blackened windscreen, a cracked rearview mirror and a faulty steering wheel.
Given all these disadvantages, central bankers seem to have had much to boast about. Average inflation in the big seven industrial economies fell to a mere 2.3% one year, close to its lowest lev-el in 30 years, before rising slightly to 2.5% the next July. This is a long way below the double-digit rates which many countries experienced in the 1970s and early 1980s.
It is also less than most forecasters has predicted. In late 1994 the panel of economists which The Economist polls each month said that America´s inflation rate would average 3.5% in 1995. In fact, it fell to 2.6% in August, and is expected to average only about 3% for the year as a whole.
In Britain and Japan inflation is running half a percentage point below the rate predicted at the end of last year. This is no flash in the pan; over the past few years, inflation has been continually lower than expected in Britain and America.
Economists have been particularly surprised by favourable inflation figures in Britain and the United States, since conventional measures suggest that both economies, and especially that of A-merica, have little productive slack. America´s capacity utilisation, for example, hit historically high levels earlier this year, and its jobless rate (5.6% in August) has fallen below most estimates of the natural rate of unemployment--the rate below which inflation has taken off in the past.
Why has inflation proved so mild? The most thrilling explanation is, unfortunately, a little defective. Some economists argue that powerful structural changes in the world have up-ended the old economic models which were based upon the historical link between growth and inflation.
According to the text，making monetary policy changes__________．
A．is comparable to driving a car
B．is similar to carrying out scientific work
C．will not influence the economy immediately
D．will have an immediate impact on the inflation rate
