2. 外语
  3. Black holes are part of space. The sun is the heaviest star in the universe.

Black holes are part of space. The sun is the heaviest star in the universe.

admin2009-01-21  39
问题 Black holes are part of space.  
The sun is the heaviest star in the universe.
选项 A、Right
B、Wrong
C、Not mentioned
答案C
解析
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