What is the main idea of the passage? The earliest dinosaurs lived in the time that was about ______ years from today according

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问题 What is the main idea of the passage?
The earliest dinosaurs lived in the time that was about ______ years from today according to the passage.

选项

答案250 million

解析 本题空白处问“根据本文,最早的恐龙所生活的年代距今有多少年了”。文中最后一段提到“Sharks have existed for over 350 million years.They evolved over 100 million years before the dinosaurs did. (鲨鱼的存在已经超过了3亿5千万年,它们比恐龙还要早1亿年。)”据此推算,最早的恐龙应该生活在距今2亿5千万年的时代。因此答案为“250 million”。
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