【简答题】第17篇 There is one thing. We can’t see it. Sometimes we can hear it and evenfeel ( 感知)it. Without it, all the living things will die. Can you guess what it is? Yes,it is air. However, what’s the air li...
【简答题】There is one thing. We can't see it. Sometimes we can hear it and even feel( 感知 ) it. Without it, all the living things will die. Can you guess what it is? Yes, it is air 。 However, what's the air lik...