Chemistry, 29.07.2021 23:00 vhife4901

Khí X có trong không khí, X đóng vai trò quyết định đối với sự sống của người và động vật, X duy trì sự cháy. X là A. N2. B. O3. C. CO2. D. O2.

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Khí X có trong không khí, X đóng vai trò quyết định đối với sự sống của người và động vật, X duy trì...

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