2. 外语
  3. Which of the following does the passage mainly discuss? According to the passage, the Carboniferous period was characterized b

Which of the following does the passage mainly discuss? According to the passage, the Carboniferous period was characterized b

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问题  Which of the following does the passage mainly discuss?
  According to the passage, the Carboniferous period was characterized by
选项 A、a reduction in the number of coal deposits
B、the burning of a large amount of coal
C、an abundance of plants
D、an accelerated rate of glacier formation
答案C
解析
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