英文儿歌歌词：What is This What's this? What?What? It's a hat. It's a hat,hat,hat. What's this? What?What? It's a bat. It's a bat,bat,bat. What's this? What?What? It's a mat. It's a mat,mat,mat. What's this? What?What? It's a hat. It's a cat,c...阅读全文