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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单项选择题
It can be inferred that the author regards a program of controlled fluoridation of public water supplies as ______.
A．an unnecessary government program that wastes economic resources
B．a potentially valuable strategy of preventive medicine
C．a government policy that has relatively little effect on the health of a population
D．an important element of curative medicine
单项选择题
Bendigo was taught to fight by ______.
A．his mother
B．his father
C．a friend
D．street gangs
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