2. 职称英语
  3. According to the discoveries of the astronomers, when did galaxies form? [br] Th

According to the discoveries of the astronomers, when did galaxies form? [br] Th

游客2024-06-13  65
问题 According to the discoveries of the astronomers, when did galaxies form? [br] The comparative rarity of IOK-1 means that significant changes must have occurred in the universe over the 60 million years that ______.
选项
答案 separate the two epochs
解析 根据题干中的关键词comparative rarity 和60 million years定位到倒数第六段，可知诸如IOK-1之类物体相对的稀有性表明，在分割两个时代的六千万年间，宇宙一定有了重要的改变。
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