There Pictures from outer space now show us how much land has ch

There Pictures from outer space now show us how much land has changed on earth．These images are taken by Landsat 7,a government satellite．The satellites have been used for 27 years．They reveal the clear-cutting of forests in the northwestern part of the United States．Pictures show the loss of rain forests in South America. NASA's Darrel Williams speaks about the Landsat 7 Project．He said that an eruption caused trees to burn up in a large forest．Fifteen years later,pinkish images from space show that the trees and plant life are growing again．Williams says that clear-cut areas easily show up in the pictures．He wants Americans to look at how much land is being cleared of forests in our country. Satellites have provided other information about changes on earth．In the past ten years,more than four miles have shrunk from glaciers in Alaska．Landsat 7 received these computer images of Glacier Bay in Alaska. Hurricanes Floyd and Irene have damaged the coastline in North Carolina．Runoff from farms and silt have gone into the．ocean according to satellite images．Loss of trees and forests have caused hotter summers in southern cities such as Atlanta,Georgia. The Landsat 7 images are like pictures in a photo album．Instead of pictures of the family,the album shows changes around the globe in the past 25 years. A new satellite,Terra,is going to be launched by NASA soon．It will be more advanced than Landsat 7 and will take important global pictures．Ocean temperatures and energy loss will be provided by Terra daily. Terra will be a better satellite because
A、no other country can make one like it
B、it is much cheaper to operate
C、it is more sophisticated than Landsat 7
D、Terra will show energy gains
【正确答案】：C
【题目解析】：根据文章内容，Terra卫星即将由NASA发射，并被描述为比Landsat 7更先进，将拍摄重要的全球图片。文章明确指出：“Terra will be more advanced than Landsat 7 and will take important global pictures.” 这句话直接支持了C选项，即Terra比Landsat 7更先进。 A选项提到“没有其他国家能制造这样的卫星”，这在文章中并未提及，因此不是正确答案。 B选项说“它的运行成本更低”，文章中也没有提及Terra的运行成本，所以B选项不正确。 D选项表示“Terra将显示能量增益”，但文章提到的是Terra将提供海洋温度和能量损失的信息，而不是能量增益，因此D选项也不正确。 综上所述，正确答案是C，即Terra卫星比Landsat 7更先进。