What is the meaning of :
''Which of the following substances are present in higher percentage in breathed air than in unbreathed air?''
I am not sure what is the question asking...
plz help!! tks very much!!
f.2 science
2014-11-01 1:55 am
回答 (1)
2014-11-02 5:45 am
✔ 最佳答案
breathedair : 已呼吸的空氣（指人呼吸時所呼出的氣體）
unbreathed air : 未呼吸的空氣（指普通的空氣）
''Which of the following substances are presentin higher percentage in breathed air than in unbreathed air?'' 的意思是：
「以下哪些物質，在已呼吸的空氣中的含量，高於在未呼吸的空氣中的含量。
Common answers are : carbon dioxide and water vapour
收錄日期: 2021-04-15 17:06:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20141031000051KK00054