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TOEFL
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Listening practice
/ Section MMNH
Listen to an Academic Talk
Listen to part of a talk in an oceanography class.
Listen
27. Why does the speaker mention that a circuit takes about a thousand years?
A
To show how difficult the currents are to measure
B
To argue that the ocean is older than the atmosphere
C
To explain why the deep ocean responds slowly to surface warming
D
To show that the poles are cooling