单项选择题

A．To demonstrate the latest use of computer graphics.
B．To raise funds for public television programming.
C．To explain the workings of the brain.
D．To increase membership in professional medical societies.
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问答题
How are the mass media said to influence our ability to make decisions
单项选择题
From what the Brazilian biologist says, we know that tourists like her______.
A．are reluctant to carry cash with them
B．simply don’’t care how much they spend
C．are not good at planning their expenditure
D．often spend more money than they can afford
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