Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.
A that a black hole lies at the center of the Milky Way and of
B that a black hole lies at the Milky Way’s center and
[tr][td]C that there is a black hole lying at the Milky Way’s center an[/td][/tr] [tr][td]D of a black hole lying at the Milky Way’s center and[/td][/tr][tr][td]E of a black hole that lies at the center of the Milky Way and of [/td][/tr]
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发表于 2012-11-2 15:16:27
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