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3.Until recently,scientists had mapped only about 20 percent of the sea floor.But our knowledge of the deep seas is changing because of information from satellites.Scientists have produced a new map that provides a detailed picture of the oceans.The map is expected to help oceanographers (海洋学家),industry and governments.
The new map is twice as detailed as the map made 20 years ago.David Sandwell is a geophysics professor at the University of California.He and other scientists worked on the mapping project.He says they turned to space to look deeper into the ocean.
The scientists collected and studied information from two satellites.Some of the data came from the European Space Agency's Cryo-2 satellite.It was placed in Earth's orbit to watch sea ice.The other satellite is the American space agency's Jason-1.It is studying the surface of the oceans.Scientists combined the satellite data with images gathered by sonar (声波定位仪) equipment on ships.Sonar works by sending sound waves through the water.When the sound waves hit an object,its presence is confirmed.
The new map shows the sea floor as it has never been seen before.It shows thousands of underwater mountains and places where continents pulled apart.It shows where earthquakes were active many years ago.They all are buried deep underneath the ocean floor.
David Sandwell says the map is a powerful tool for fisheries,those interested in protecting the environment and for oil exploration.
"The petrol exploration industry is interested in how to reconnect the continents,bring them back together tectonically so you can map the basins on one continental edge-say,Africa-and use that to establish where the similar basin would be on the other continental edge in South America."
If scientists know that information,they may be able to find oil fields.The new data also will help scientists improve their estimates of ocean depths.This information can help ships travel safely and improve military operations and scientific projects worldwide.
Mr.Sandwell thinks scientists will make many more discoveries as they examine the new map and the information it provides.

32.Which one is not mentioned about the benefits brought by the new map?C
A.Fisheries.
B.Scientific projects.
C.Ship manufacture.
D.Oil exploration.
33.What can we know about the new map?B
A.It shows where earthquakes will happen.
B.It will be helpful to industry and governments.
C.It is three times as detailed as the old one years ago.
D.It shows the sea floor as it has ever been seen before.
34.The text is likely to appear inC.
A.a newspaper    
B.an advertisement
C.a science magazine    
D.a finance report
35.Which of the following can be the best title for the text?D
A.The detailed picture of the oceans
B.Underwater mountains and places
C.More discoveries about the oceans
D.Scientists create new maps of ocean floor.

分析 本文属于说明文阅读,作者通过这篇文章主要向我们介绍了科学家绘制的新式海底地图,它比20年前的地图要详细得多,还给海洋科学,工业科学,石油勘探等方面都带来了许多好处,甚至能帮助船舶安全地旅行,并改善世界范围内的军事行动和科学项目.

解答 32.C. 细节理解题.根据文章第五段中的"…the map is a powerful tool for fisheries,those interested in protecting the environment and for oil exploration."可知,新式地图的编制有利于渔业,环境科学研究以及油气勘探等方面.没提到造船业; 故选C.
33.B. 细节理解题.根据文章第一段中的"The map is expected to help oceanographers (海洋学家),industry and governments."可知,新式地图有利于海洋学家,工业及政府; 故选B.
34.C. 推理判断题.纵观全文,主要讲述了新式地图给海洋科学,工业科学,石油勘探等方面带来的有利之处.故可以推测该文来源于科技杂志.
35.D. 主旨大意题.根据文章第一段中的"Scientists have produced a new map that provides a detailed picture of the oceans.The map is expected to help oceanographers (海洋学家),industry and governments."以及下文对新式地图绘制过程及在各领域方面的运用可知,本文主要介绍了科学家绘制的新式海底地图; 故选D.

点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.

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