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单项选择题

Questions 9 to 10 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question.
Now listen to the news.

Magnetic resonance imaging devices can show ______.
A．dependence on illegal drugs
B．targeted points on the body
C．the change in the flow of blood
D．whether a patient can be treated by acupuncture
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