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  3. What does the second paragraph mainly discuss? Which of the following characteristics of radio galaxies is mentioned in the pas

What does the second paragraph mainly discuss? Which of the following characteristics of radio galaxies is mentioned in the pas

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问题 What does the second paragraph mainly discuss?
Which of the following characteristics of radio galaxies is mentioned in the passage?
选项 A、They are a type of elliptical galaxy.
B、They are usually too small to be seen with a telescope.
C、They are closely related to irregular galaxies.
D、They are not as bright as spiral galaxies.
答案A
解析
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