提起二氧化碳,人们就会自然而然地想起它是呼吸器官排出的废气。空气中的二氧化碳含量过多,就会导致动物的死亡:把一只小白鼠放入一只充满二氧化碳的瓶子里,不到几分钟,这只小白鼠就会一命呜呼。人类也是如此。但是你可知道:地球上要是没有二氧化碳,那现有的众多生物就不可能存在了!二氧化碳是空气的一种组成成分,在地球上还没有出现生命的时候,大气中的二氧 Lift carbon dioxide, people will naturally think of it is the exhaust of exhaust organs. Too much carbon dioxide in the air can cause the animal to die: It takes less than a few minutes for a mouse to get into a carbonated bottle. So is man. But you know: Without the carbon dioxide on the earth, that many existing creatures can not exist! Carbon dioxide is a component of the air, in the absence of life on Earth, the atmosphere of dioxin