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Question 5 of 6
Why does the professor talk about the breaking apart of Earth's continents?

A.

To give another example of how uranium-lead dating might be useful

B.

To explain how the Grand Canyon was formed

C.

To demonstrate how difficult uranium-lead dating is

D.

To disprove a theory about the age of Earth's first mountain ranges

我的答案:

正确答案:A

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