单项选择题

What did the 19th century scientists think about our brain

A．We can remember everything that happens to us.
B．The power of one’s brain gets weaker as one grows older.
C．We should use our brain less so that it can work better.
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单项选择题
A．The geology of the American west.B．The geography of America.C．The history of America.
A．The geology of the American west.
B．The geography of America.
C．The history of America.
单项选择题
A．To increase the amount of research done on the brain.B．To say exactly what each part of the brain does.C．To give the brain plenty of exercise.
A．To increase the amount of research done on the brain.
B．To say exactly what each part of the brain does.
C．To give the brain plenty of exercise.
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