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The atmosphere of both Mars and Venus is mostly _____ carbon dioxide O carbon monoxide O nitrogen O oxygen
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2 votes
The atmosphere of both Mars and Venus is mostly _____

carbon dioxide
O carbon monoxide
O nitrogen
O oxygen

User Johnspackman
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2 Answers

4 votes
carbon monoxide is the correct answer
User Paco Valdez
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5 votes
Carbon monoxide is the right answer
User Avalon
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