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TOEFL
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Listening practice
/ Section HLE6
Listen to an Academic Talk
Listen to part of a talk in a psychology class.
Listen
46. Why does the speaker mention the brain's share of body weight and energy?
A
To explain why brain imaging is difficult to carry out
B
To argue that unused tissue would not have been preserved by evolution
C
To show that the brain is larger than people assume
D
To account for the tiredness produced by mental effort