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In science the meaning of the word "explain" suffers with civilization's every step in search of reality. Science can not really explain electricity, magnetism, and gravitation; their effects can be measured and predicted, but of their nature no more is known to the modem scientist than to Thales who first speculated on the electrification of amber. Most contemporary physicists reject the notion that man can ever discover what these mysterious forces "really" are. Electricity, Bertrand Russell says, "is not a thing, like St. Paul's Cathedral; it is a way in which things behave. When we have told how things behave, when they are electrified, we have told all there is to tell." Until recently scientists would have disapproved of such an idea. Aristotle, for example, whose natural science dominated Western thought for two thousand years, believed that man could arrive at an understanding of reality by reasoning from self-evident principles. He felt, for example, that it is a self-evident principle that everything in the universe has its proper place, hence one can conclude that objects fall to the ground because that is where they belong, and smoking goes up because that is where it belongs. The goal of Aristotelian science was to explain why things happen. Modem science was born when Galileo began trying to explain how things happen and thus originated the method of con- trolled experiment which now forms the basis of scientific investigation.
The aim of controlled scientific experiments is ______.
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There is a new type of small advertisement becoming increasingly common in newspaper classified columns. It is sometimes placed among "situations vacant" , although it does not offer anyone a job; and sometimes it appears among "situations wanted", although it is not placed by someone looking for a job either. What it does is to offer help in applying for a job.
"Contact us before writing application", or "Make use of our long experience in preparing your curriculum vitae, or job history", is how it is usually expressed. The growth and apparent success of such a specialized service is, of course, a reflection on rite current high levels of unemployment. It is also an indication of growing importance of the curriculum vitae (or job history), with the suggestion that it may now qualify as an art form. in its own right.
There was a time when job seekers simply wrote letters of application. "Just put down your name, address, age and whether you have passed any exams", was about the average level of advice offered to young people applying for their first jobs when they left school. The letter was really just for openers, it was explained. Everything else could and should be saved for the interview. And in those days of full employment the technique worked. The letter proved that you could write and were available for work. Your eager face and intelligent replies did the rest.
Later, as you moved up the ladder, something slightly more sophisticated was called for. The advice then was to put something in the letter which would distinguish you from the rest. It might be the aggressive approach. "Your search is over. I am the person you are looking for," was a widely used trick that occasionally succeeded. Or it might be some special feature specially designed for the job in view. There is no doubt, however, that it is the increasing number of applicants with university education at all points in the process of engaging staff that has led to the greater importance of the curriculum vitae.
The new type of advertisement which is appearing in newspaper columns ______.
The Economic and Social Research Council, which gives grants to postgraduate social scientists, wants to get better value for money by cutting short this agony. It would like to see faster completion rates: until recently, only about 25% of PhD candidates were finishing within four years. The ESRC’ s response has been to stop PhD grants to all institutions where the proportion taking less than four years is below 10%; in the first year of this policy the national average shot up to 39%. The ESRC feels vindicated in its toughness, and will progressively raise the threshold to 40% in two years. Unless completion rates improve further, this would exclude 55 out of 73 universities and polytechnics-including Oxford University, the London School of Economics and the London Business School.
Predictably, howls of protest have come from the universities, who view the blacklisting of whole institutions as arbitrary and negative. They point out that many of the best students go quickly into jobs where they can apply their research skills, but consequently take longer to finish their theses. Polytechnics with as few as two PhD candidates complain that they are penalized by random fluctuations in student performance. The colleges say there is no hard evidence to prove that faster completion rates result from greater efficiency rather than lower standards or less ambitious doctoral topics.
The ESRC thinks it might not be a bad thing if PhD students were more modest in their aims. It would prefer to see more systematic teaching of research skills and fewer unrealistic expectations placed on young men and women who are undertaking their first piece of serious research. So in future its grants will be given only where it is convinced that students are being trained as researchers, rather than carrying out purely knowledge-based studies.
The ESRC can not dictate the standard of thesis required by external examiners, or force departments to give graduates more teaching time. The most it can do is to try to persuade universities to change their ways. Recalcitrant professors should note that students want more research training and a less elaborate style. of thesis, too.
By the time new doctors get a job and try to finish their theses in spare time ______.
下列关于工程预付款的计算与支付的阐述中错误的是（)。A．包工包料工程的预付同约定拨付，原则上预付下列关于工程预付款的计算与支付的阐述中错误的是()。
企业对于本期发现的、属于以前年度影响损益的重大会计差错，应调整本期利润表相关项目的金额。()
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