Mcca1xcoleb1anneN Mcca1xcoleb1anneN

24-07-2016
Geography

contestada

Today's atmosphere is full of nitrogen and oxygen. These are _____.

A. trace gases
B. variable gases
C. primary gases
D. secondary gases

Respuesta :

24-07-2016

There are C. primary gases

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jsteen2004 jsteen2004

10-10-2019

Today's atmosphere is full of nitrogen and oxygen. These are primary gases.

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