2. 外语
  3. Black holes are part of space. The Hubble Space Telescope helps scientists to understand the nature of the universe.

Black holes are part of space. The Hubble Space Telescope helps scientists to understand the nature of the universe.

admin2009-01-21  60
问题 Black holes are part of space.  
The Hubble Space Telescope helps scientists to understand the nature of the universe.
选项 A、Right
B、Wrong
C、Not mentioned
答案A
解析
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