单项选择题

What is the chief purpose of the passage

A．To propose new fields in brain research.
B．To outline the research findings on the brain structure.
C．To discuss the various causes of structural differences in brain.
D．To explain the relationship between gender and brain structure.

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单项选择题

According to the passage, brain differences are caused by ______ factors.

A．biological
B．psychological
C．mental
D．social

单项选择题

Which of the following statements is CORRECT

A．Brain differences indicate superiority of one gender over the other.
B．Results of scientific research can not support popular belief.
C．The difference in the brain structure between the men and women has been known for a long time.
D．Biologists are conducting research where psychologists have given up.