Scientists figured out that human bodies are basically made of（）
A: hydrogen, carbon, nitrogen, and oxygen atoms
B: water vapor, ammonia, carbon dioxide, methane and hydrogen
C: biomolecules and water
D: evolutionary molecules
A: hydrogen, carbon, nitrogen, and oxygen atoms
B: water vapor, ammonia, carbon dioxide, methane and hydrogen
C: biomolecules and water
D: evolutionary molecules
举一反三
- ( ) is taken in by plants to make food. A: nitrogen B: hydrogen C: oxygen D: carbon dioxide
- The gas with maximum percentage in the atmosphere is ( ). A: nitrogen B: hydrogen C: oxygen D: carbon dioxide
- The synonym of CO2 is .（ ）。 A: hydrogen B: carbon monoxide C: carbon dioxide D: oxygen
- Which is the most abundant atom (% body weight) in the human body? ( ) A: Hydrogen B: Oxygen C: Carbon D: Nitrogen
- （ ）is the most abundant chemical element in plants and animals. A: Oxygen B: Carbon C: Hydrogen D: Nitrogen