单选题：Paragraph 4__________

题目分类：理工类
题目类型：单选题
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题目内容：

Paragraph 4__________ A．Is there proof that black holes really exist?
B．What are different types of black holes?
C．How are black holes formed?
D．How were black holes named?
E．What happens to the objects around a black hole?
F．What are black holes made of?

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答案解析：

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分类：理工类题型：单选题

请在第(53)处填上正确答案。

请在第__(53)__处填上正确答案。 A．establishes B．plays C．makes D．obtains

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翻译一Part IV TranslationDirections : For this part,you are all

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分类：理工类题型：单选题

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We can observe and measure observed intelligence，but genetic in Telligence______

分类：理工类题型：单选题