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[originaltext] American scientists are developing maps that can identify are
[originaltext] American scientists are developing maps that can identify are
游客
2023-07-04
51
管理
问题
American scientists are developing maps that can identify areas of future flooding. The maps also may help scientists estimate the possibility of extremely dry weather and severe storms.
Tom Jackson of the United States Department of Agriculture prepared the map after the April flood. He used information provided by satellites in Earth orbit. The maps are produced from dish receivers on the satellites. Each dish receiver measures the wetness of the soil by capturing the natural release of" microwave radiation from the soil. The receivers turn rapidly. This provides complete coverage of each area the satellite passes over.
Mr. Jackson and other scientists have tested Aqua’s equipment in airplanes and satellites flying over several states. The scientists used the tests to develop ways to change the information gathered into maps.
Mr. Jackson now plans to compare the microwave dish receiver findings with information from tests on Earth’s soil. He will use instruments at Agricultural Research Service centers in four states. He also will study information provided by forty ground observation centers across the country.
Questions 20 to 22 are based on the passage you have just heard.
20. Why American scientists are developing these maps?
21. How can the satellites catch the information about the soil?
22. What is the future work planned to do?
选项
A、By turning the intensity of sunshine into maps.
B、By analyzing the recent weather report.
C、By capturing the microwave radiation from the soil.
D、By analyzing information provided by ground observation centers.
答案
C
解析
细节题。文章讲到“Each dish receiver measures thewetness of the soil by capturing the natural release of microwave radiationfrom the soil.”也就是说接收器测量土壤湿度是通过检测土壤微波辐射的方式实现的。答案为C。
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