2. 外语
  3. A、From the starting point back to the earth. B、Several hundred kilometers. C、A certain height. D、About 50 kilometers. D

A、From the starting point back to the earth. B、Several hundred kilometers. C、A certain height. D、About 50 kilometers. D

admin2013-06-03  59
问题  
选项 A、From the starting point back to the earth.
B、Several hundred kilometers.
C、A certain height.
D、About 50 kilometers.
答案D
解析
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大学英语四级

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