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- 問題詳情：Theearthistheonlyplanetthatscientistsarecertainhaslife.Whatdoestheearthhavethatotherplanetsinoursolarsystemdon'thave?Foronething,theearthisjusttherighttemperature.As61.________thirdplanetfromthesun,theearthseemstobejusttherightdistanceaway.T...
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