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提问人：网友lustersoft 发布时间：2022-01-07

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1mol Hydrogen gas and 1mol Oxygen gas have the same volume V, if they are both at 20℃ and 1.5atm pressure.

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The gas that is eliminated by the respiratory system is _______________.

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第2题

In a flame of pure hydrogen gas, burning in air, the hydrogen reacts with oxygen to form water and releases _______.

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第3题

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A．varied

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第4题

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第5题

Helium is not flammable and, next to hydrogen, is ______A．known the lightest gasB．lightest

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第6题

One of the most promising methods of storing hydrogen fuel is ______.A．in gas formB．puttin

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第7题

The gas that is supplied to tissues by the respiratory system is_____________.

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第8题

Researchers say a small pond of algae could produce enough hydrogen gas to meet the ______

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