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[单选题]
Facing the ruins of his house, he couldn't____ how the explosion had happened.
A
bring out
B
work out
C
figure out
D
pick out
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试题答案：
C
答案解释：
相关题目
She demanded that we explain why we were having a party without informing her, _______?(1分)
22. Chess must be one of the oldest games in the world. An Arab traveler in India in the year 900 wrote that it was played "long, long ago". Chess was probably invented in India, and it has been played everywhere from Japan to Europe since 1400. The name "chess" is interesting. When one player is attacking the other's king, he says, in English,"check". When the king has been caught and cannot move anywhere, he says "check mate". These words come from Persian. "Shah mat" means "the king is dead". That is when the game is over, and one player has won.Such an old game changes very slowly. The rules have not always been the same as they are now. For example, at one time the queen could only move one square at a time. Now she is the strongest piece on the board. It would be interesting to know why this has happened! Chess takes time and thought, but it is game for all kinds of people. You don't have to be a champion in order to enjoy it. It is not always played by two people sitting at the same table. The first time the Americans beat the Russians was in a match played by radio. Some of the chess masters are able to play many people at the same time. The record was when one man played 400 games! It is said that some people play chess by post. This must make chess the slowest game in the world.(10分)22.1 Which of the following is known to be true?____(2分)A. Chess is an old Indian traveling game.B. Chess is the oldest game in the world.C. Chess was played in Japan and Europe before 1400.D. Chess was played in India long before 900.
1.I’ll leave Changsha for Beijing ______ a week, while my brother will leave Beijing for Changsha ______ our National Day.(1分)
Mary opened the package which _______ that morning.(1分)
People from Wenchuan say they would like to contribute more to the typhoon-affected people in Taiwan, but money is ______ this year after the earthquake. (1分)
3.2 The Pilgrims spend their first winter____.(1分)
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)23.1Which 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.
5. (A)trouble (B)fame (C)fog (D)hurry
1.Friction is a force which opposes motion. Much of the energy supplied to a complicated machine with many moving parts is wasted in overcoming this opposition. The energy is converted into useless heat. The amount thus lost can be considerably reduced and the life of the machine prolonged by careful lubrication. This reduction improves the efficiency of the machine. Another way in which friction is reduced is to substitute roller or ball bearings for the earlier type of bearing, in which the surfaces in contact move by sliding. Bearings of these later types are used very extensively in many kinds of modern machinery.It must not be assumed, however, that friction is always a disadvantage. In many instances it is highly important. Belts are often used in conveying power from one machine to another. In the absence of friction, this could not be done. The driving wheel would not run the belt, neither would the belt run the wheel to driver. Without friction, then, belted machinery could not be used. Again in the case of all motor vehicles, friction is essential in the operation of the brake. Were there no friction, there could be no brake. But even this illustration does not give an adequate picture of the importance of friction. The vehicle could not even be started if it were not for the friction exerted between the tires and the road. Nails hold in wood, and screws hold in either wood or metal by reason of friction, without which they would be useless. Walking is difficult enough on an icy pavement, but it would be wholly impossible if there were no friction at all between the shoe and the pavement.(5分)1.1 Friction arises when____.(1分)A. an opposing force of motion exists B. the energy is wastedC. everything is motionlessD. a complicated machine is supplied with energy
27. The boatman was willing to take Robin across the river because____.
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