单项选择题

For our bodies to function properly, we should ______.

A．sleep for at least eight hours per night
B．believe that we need less sleep as we age
C．adjust our activities to the new inventions
D．be able to predict the rhythms of our biological clocks
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单项选择题
According to the passage, which of the following statements a bout the right hemisphere of the brain is accurate
A．It has the potential to serve as a "language area".
B．It controls the ability to comprehend but not the ability to speak a language
C．If it is damaged, gross motor control of the right side of the body may be affected.
D．It is the right where Wernick's area is located.
单项选择题
It can be interred that aphasias in adults often result in permanent damage because ______.
A．much memory is lost
B．adults have more trouble learning a foreign language
C．the right hemisphere is no longer as adaptable as it once was.
D．brain cells in adults arc especially vulnerable to infection
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