Language:Chinese.paperback.Pub Date:2024-03.publisher:Tiandi Publishing House.description:Paperback. Pub Date: 2024-03 Pages: 93 Publisher: Tiandi Publishing House The earth was formed about 4.5 billion years ago. and free oxygen molecules did not appear until 2.4 billion years ago; hundreds of millions of years ago. the atmosphere system
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Vendeur : liu xing, Nanjing, JS, Chine
paperback. Etat : New. Language:Chinese.Paperback. Pub Date: 2024-03 Pages: 93 Publisher: Tiandi Publishing House The earth was formed about 4.5 billion years ago. and free oxygen molecules did not appear until 2.4 billion years ago; hundreds of millions of years ago. the atmosphere system suitable for the reproduction of life gradually formed. and then we were born. The atmosphere provides the earth with suitable humidity. breathable oxygen. as well as insulation system and radiation system. However. the atmospher. N° de réf. du vendeur DS048873
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