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[单选题]
All the houses in the area are being____ to make way for a new highway.
A
knocked out
B
knocked down
C
knocked off
D
knocked around
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试题答案：
B
答案解释：
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23.There is a difference between science and technology.Science is a method of answering theoretical questions;technology is a method of solving practical problem.Science has to do with the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships;technology has to do with tools,techniques,and procedures for implementing the finding of science.Another distinction between science and technology has to do with the progress in each.Progress in science excludes the human factor.Scientists,who seek to comprehend the universe and know the truth with the highest degree of accuracy and certainty,cannot pay attention to their own or other people's likes or dislikes or to popular ideas about the fitness of things.What scientists discover may shock or anger people-as did Darwin's theory of evolution.But even an unpleasant truth is more than likely to be useful;besides,we have the choice of refusing to believe it!But it's hardly so with technology and we do not have the choice of refusing to hear the sonic boom produced by a supersonic aircraft flying overhead;we do not have the choice of refusing to breathe polluted air;and we do not have the choice of living in a non-atomic age.Unlike science progress,technology must be measured in terms of the human factor.The legitimate purpose of technology is to serve people in general,not merely some people;and future generantions,not merely those who presently wish to gain advantage for themselves.Technology must be humanistic if it is to lead to a better world.(10分)23.1 Which of the following statements about science is NOT true?(2分)A. Scinece provides answers to theoretical questions.B. Scinece seeks to comprehend the universe.C. Scinece aims to discover the inter-connections of facts and rules that explain them.D. Scinece serves people in general and can be measured in terms of the human factor.
1.Resources can be said to be scarce in both an absolute and relative sense: the surface of the Earth is finite, imposing absolute scarcity; but the scarcity that concerns economists is the relative scarcity of resources in different uses. Materials used for one purpose cannot at the same time be used for other purposes; if the quantity of an input is limited, the increased use of it in one manufacturing process must cause it to become less available for other uses.The cost of a product in terms of money may not measure its true cost to society. The true cost of, say, the construction of a supersonic jet is the value of the schools and refrigerators that will never be built as a result. Every act of production uses up some of society’s available resources; it means the foregoing of an opportunity to produce something else. In deciding how to use resources most effectively to satisfy the wants of the community, this opportunity cost must ultimately be taken into account.In a market economy the price of a good and the quantity supplied depend on the cost of making it, and that cost, ultimately, is the cost of not making other goods. The market mechanism enforces this relationship. The cost of, say, a pair of shoes is the price of the leather, the labor, the fuel, and other elements used up in producing them. But the price of these inputs, in turn, depends on what they can produce elsewhere—if the leather can be used to produce handbags that are valued highly by consumers, the prices of leather will be bid up correspondingly.(5分)1.1 What does this passage mainly discuss?____(1分)A. The scarcity of manufactured goods.B. The value of scarce materials. C. The manufacturing of scarce goods.D. The cost of producing shoes.
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