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You must breathe all the time to s_tay____ alive.If you try to hold your breath f___or__more than about a minute ,your body will let you start breating again.The air that that you breathe is made up of many d__ifferent___ gases mixed together ,but your body only needs one of them,oxygen ,to keep you alive.If you ran out of oxygen,even for a very short____ time,you would die.
The air that you breathe out is warm and has water in it.You can see this i_f__ you breathe onto a mirror.The water in your breath cools down and forms a mist as it hits the cold mirror
希望对你有帮助 O(∩_∩)O~
The air that you breathe out is warm and has water in it.You can see this i_f__ you breathe onto a mirror.The water in your breath cools down and forms a mist as it hits the cold mirror
希望对你有帮助 O(∩_∩)O~
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