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The Sun and the rest of solar system formed about 4.5 billion years ago from a c
The Sun and the rest of solar system formed about 4.5 billion years ago from a c
游客
2024-12-14
33
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问题
The Sun and the rest of solar system formed about 4.5 billion years ago from a cloud of collapsing hydrogen gas.
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答案
∧solar—the
解析
表示世界上独一无二的事物,需用定冠词。此处指太阳系。另外还有宇宙the universe、the Milky Way银河等。
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