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15-06-2015
English

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What gas important to life was absent from earth’s earliest atmosphere?

A.
oxygen

B.
methane

C.
carbon dioxide

D.
nitrogen

Respuesta :

Аноним Аноним

15-06-2015

We use this gas for breathing. It is all over the air. Plants gives us this gas also. It is part of what makes us alive. Therefore, the gas is called Oxygen.

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