一井梅子
幼苗
共回答了20个问题采纳率:95% 举报
I am so glad that the Internet helped me on this problem.Clouds are formed by tiny water drops or ice crystals which we couldn’t see by our own eyes.However,they are not strong enough,when they meet cold air,bigger water drops or ice crystals will be formed and fall down to the earth,which is called rain or hail.
1年前
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