单选题：Which of the following can replace the title of this passage

题目分类：理工类
题目类型：单选题
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题目内容：

Which of the following can replace the title of this passage? A．A different Life Form, a Possibility.
B．Earthlike Living Beings Found on Titan.
C．Finding of One More Moon of Saturn’s.
D．Titan, a New Satellite Discovered.

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