2. 外语
  3. The main idea of the first paragraph is ______. According to the passage, ______ appeared earlier than ______.

The main idea of the first paragraph is ______. According to the passage, ______ appeared earlier than ______.

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问题 The main idea of the first paragraph is ______.
According to the passage, ______ appeared earlier than ______.
选项 A、apples; oranges
B、oranges; apples
C、oranges; roses
D、algae; wheat
答案D
解析 根据文章最后一句，结子的植物是由不结子的植物演化来的。
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