25自主学习阅读材料四级.doc

Exchange a glance with someone1. every glance 2. to avoid 3. ceasing to 4. Uneasy 5. the role of .Geraldo Rivera 6. TV program 7. Five 8. all of the above 9. an organization in 10. Rivera never In the old days,11.usually witnessed 12.to learn 13.learning how 14.his desire 15.dying patients should The oldest and simplest method16.personality 17. had a pleasant 18.people with 19.are often 20.different opinions Passage 5 Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage -- a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.21. According to the first paragraph, the atmosphere is essential to man in that___. A) it protects him against the harmful rays from space B) it provides sufficient light for plant growth C) it supplies the heat necessary for human survival D) it screens off the falling meteors22. We know from the passage that___. A) exposure to even tiny amounts of radiation is fatal B) the effect of exposure to radiation is slow in coming C) radiation is avoidable in space exploration D) astronauts in spacesuits neednt worry about radiation damage23. The harm radiation has done to the Apollo crew members___. A) is insignificant B) seems overestimated C) is enormous D) remains unknown24. It can be inferred from the passage that___. A) the Apollo mission was very successful B) protection from space radiation is no easy job C) astronauts will have deformed children or grandchildren D) radiation is not a threat to well-protected space explorers25. The best title for this passage would be___. A) The Atmosphere and Our Environment B) Research on Radiation C) Effects of Space Radiation D) Importance of Protection Against RadiationPassage 6 Although the United Kingdom covers only a small area of the earth’s surface, it represents people of many different origins and cultures. Yet all of them are British indeed, it would be difficult to find anyone in modern Britain who could say with certainty that his ancestors had not come to the British Isles from somewhere else. Who, then, are today’s Britains and what kind of people are they? The history of human settlement in Britain goes back to the Stone Age hunters and gatherers who arrived from the European continent about 10,000 years ago. The peoples who followed them were settled agriculturalists who kept domestic animals and knew how to make simple pottery. Around 2000 BC these Stone Age people started to erect huge stone monuments, or henges, possibly for religious purposes. Work on the henges continued into the Bronze Age, until about 1500BC. The most imposing and mysterious of these ancient monuments is Stonehenge, on windswept Salisbury plain in southwest England. Easy communication between the islands and the continental mainland must have existed and, from earliest times, this encouraged migration. By the end of the Bronze Age, around 700BC, Celtic people had arrived from north-western Europe bringing with them a revolutionary new skill: ironworking. Celts continued to come and settle in Britain for about 500 years and, by the time the Romans first landed in 55BC, the Celtic culture was well established. The earliest written records of Britain’s inhabitants come from the Romans who eventually conquered the various Celtic kingdoms then flourishing in England, Wales 。