The main idea of the first paragraph is ______. Which of the following is true?

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问题 The main idea of the first paragraph is ______.
Which of the following is true?

选项 A、Algae has existed for more than 430 million years.
B、It is impossible that algae might be the earliest plant on land.
C、Plants get food from animals in the oceans.
D、Evolution began after animals appeared on land.

答案A

解析参见第一段。

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本试题收录于：公共英语二级笔试题库公共英语（PETS）分类

公共英语二级笔试

公共英语（PETS）

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The main idea of the first paragraph is ______. Which of the following is true?

公共英语二级笔试

公共英语（PETS）

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TheUnitedStatesisaconfederationofstates．Eachstatehasthe【C1】______tomakelawswithregardtothestate．【C2】______,bas

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