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OpenStudy (anonymous):
Most of Earth’s dry air is made up of A. carbon dioxide and oxygen. B. nitrogen and argon. C. nitrogen and oxygen. D. oxygen and argon.
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OpenStudy (geometry_hater):
What do we breathe in and out?
OpenStudy (anonymous):
c.
OpenStudy (ookawaiioo):
Give the puertoricangirl a medal...... she is Right
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