相关试题
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( ) for the sun, we could not live at all.
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_______ it not for the sun, we could not live at all.
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Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planets
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they can work or not. We have a great many people today who live past the age at which they want t
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Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planets