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Alex
3 years ago
11

Airplanes reach cruising altitudes at the lower part of the Earth's stratosphere. This portion of the atmosphere is made up most

ly of _____ and _____.
Biology
2 answers:
rosijanka [135]3 years ago
5 0

Answer:1.nitrogen

2.oxygen

Explanation:hope it helps!

vodka [1.7K]3 years ago
3 0

Answer: nitrogen, oxygen

Explanation:

i just got this question on Study Island

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