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TOEFL
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Listening practice
/ Section VKQE
Listen to an Academic Talk
Listen to part of a talk.
Listen
40. What is the main purpose of the talk?
A
To compare ways of measuring the present height of cliffs.
B
To explain how grain-size patterns can help identify the original orientation of rock layers.
C
To explain why coarse-grained rocks resist weathering better.
D
To show how to determine a rock's age from its largest grains.