Science

中二科學生物與空氣

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11 questions

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  • 1. Multiple-choice
    30 seconds
    1 pt
    Image

    R是什麼氣體?

    二氧化碳

    貴氣體

  • 2. Multiple-choice
    30 seconds
    1 pt
    Image

    Q是什麼氣體?

    二氧化碳

    貴氣體

  • 3. Multiple-choice
    30 seconds
    1 pt
    Image

    Q的百分比是多少?

    0.03%

    78%

    21%

    0.4%

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