难点 24 不可臆断的推理题此类题目，要求学生在通篇理解文章的基础上，依据文章提供的事实，将各种信息加以分析，从而得出正确的结论，切不可站在自己的立场上凭空臆断。难点磁场1.()In July 1994 Jupiter, the largest planet in our solar system, was struck by 21 pieces of comet(彗星). When the fragments(碎片)landed in the southern part of the giant planet, the explosions were watched by scientists here on earth. But what if our own planet was hit by a comet?The year is 2094. It has been announced that a comet is heading towards the Earth. Most of it will miss our planet, but two fragments will probably hit the southern part of the Earth. The news has caused panic.On 17 July, a fragment four kilometers wide enters the Earths atmosphere with a huge explosion. About half of the fragment is destroyed. But the major part survives and hits the South Atlantic at 200 times the speed of sound. The sea boils and an enormous wave is created and spreads. The wall of water rushes towards southern Africa at 800 kilometres an hour. Cities on the African coast are totally destroyed and millions of people are drowned. The wave moves into the Indian Ocean and heads towards Asia.Millions of people are already dead in the southern part of the Earth, but the north wont escape for long. Tons of broken pieces are thrown into the atmosphere by the explosions. As the sun is hidden by clouds of dust, temperatures around the world fall to almost zero. Crops are ruined. Wars break out as countries fight for food. A year later civilization has collapsed. No more than 10 million people have survived.Could it really happen? In fact, it has already happened more than once in the history of the Earth. The dinosaurs(恐龙)were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believe that the Earth was hit by a space fragment. The dinosaurs couldnt survive in the cold climate that followed and they became extinct. Will we meet the same end?Question 1:It can be concluded that the passage is most probably part of a(n) _.A.horror story B.news reportC.research paper D.article of popular science2.()The tower of Big Ben Londons most famous building,has always leaned (倾斜) slightly, but construction work on a new line for the London Underground seemed likely to give the tower a real lean. Engineers have had to prop up (支撑) its base to prevent it from damaging the rest of the Houses of Parliament.To control the towers movement, engineers pumped grout (水泥浆) into the soil under the tower. The tower now leans an extra few centimetres, but the lean can only be seen by the most sharp-eyed observer.Between 1995 and 1997, to lengthen the Jubilee line of the Underground, builders dug a 40-metre-deep hole just 31 metres north of the clock tower. And the new tube (underground) tunnels were even nearer to the tower. John Burland, who recently helped stop the increasing lean in the Leaning Tower of Pisa and was an adviser to the Jubilee line project, believed the work would affect the tower. In his opinion, no further lean should go beyond a safety limit of 27.5 millimetres over the existing lean of 220 millimetres.To keep the lean within this limit, Burland told the British Association about the new method of pumping grout immediately under the base of the tower. More than 300 tons of grout were pumped in during construction. The towers, additional lean went between 10 and 25 millimetres, but never passed 27.5 millimetres.After the construction work was completed in late 1997, a review of movements in nearby walls showed that the building was in better shape than had been thought before and the safety limit was raised to 35 millimetres before any action needs to be taken.Since 1997,the tower has continued to lean, Burland told Modern Construction.The latest measurements, taken this year, suggest that the towers lean had just reached 35 millimetres. But following regular re-examinations of the tower, experts are sure that the tower has stabilised (稳定).A spokesman for London Underground says: “We understand the tower has stabilised and returned to its normal movement cycle.”From Modern Construction, 16 September 2000Question 2:We can infer from the article that_.A.the tower of Big Ben with damage the Houses of ParliamentB.the Jubilee line should be stopped in Burlands opinionC.the writer is blaming Burland for making a mistakeD.the propping up work has proved to be successful3.()The use of the word imitation(模仿）reminds me that we ought to make some more comments on the risk of people imitating what they see on the screen in the way of crime(犯罪） or violence.First there was always a risk of children acting out scenes which could be dangerous.For example,I remember a woman who was head of a middle school telling me that she had happened to look out of her window when the children were in the playground and had seen them putting a small boy on a chair with a rope round his neck and the rope over the branch of a tree;fortunately she was in time to get there b