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  3. What can people know from the crown of an ancient tree found in New York? What’s the passage mainly about?

What can people know from the crown of an ancient tree found in New York? What’s the passage mainly about?

admin2009-04-23  41
问题 What can people know from the crown of an ancient tree found in New York?
What’s the passage mainly about?
选项 A、The internal structure shows how ancient trees grew.
B、The CO2 lever exerts impact on the leaves of ancient tress.
C、Analysis of ancient fossils paint picture of the Earth’s earliest trees.
D、The ancient trees have no leaves and few branches.
答案C
解析 这篇文章主要讲了通过对纽约出土的一个古树树冠的分析，科学家们了解了地球上早期树木的样子。古树是如何生长的本文没有涉及，故可排除A；二氧化碳水平对于古树叶子的影响是本文提到的一个方面，但不是主要内容，故可排除B；古树没有叶子并且枝杈少是古树外观的一个小方面，也不是本文主要内容，故可排除D。
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