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Paragraph 2 __________ 查看材料A.Is there proof th

2022-08-01 21:30:04 问答库 阅读 167 次

问题详情

Paragraph 2 __________ 查看材料
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 ?请帮忙给出正确答案和分析,谢谢!

参考答案

正确答案:F
第二段首句是主题句,即“黑洞来自于那些由氢、其他气体以及一些金属组成的星体”,因而F选项(黑洞是由什么构成的)为正确答案。

考点:材料