2. 外语
  3. Black holes are part of space. The attraction of two large stars leads to gravity.

Black holes are part of space. The attraction of two large stars leads to gravity.

admin2009-01-21  67
问题 Black holes are part of space.  
The attraction of two large stars leads to gravity.
选项 A、Right
B、Wrong
C、Not mentioned
答案C
解析
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