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单项选择题

Questions 6 to 8 are based on the following news. At the end of the news item, you will be given 15 seconds to answer each of the following questions.
Now listen to the news.

We should— when we want to glimpse inside the sun.
A．answer questions about its temperature
B．translate the sounds into images
C．know how gases inside ebb and flow
D．measure the pitch
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