1．Which of the following does a paper burn in? A．CO2 B．N2 C．O2 D．H——青夏教育精英家教网—

摘要：1．Which of the following does a paper burn in? A．CO2 B．N2 C．O2 D．H2

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Which of the following does paper burn in?

A．CO₂ B．N₂ C．O₂ D．H₂O

Which of the following does paper burn in?

A．CO2

B．N2

C．He

D．O2

Which of the following does paper burn in?

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Which of the following does paper burn in?

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