题干
阅读理解
Look at this. What's this in English, do you know? Ah, it's a photo. Who's that in the photo? It's Li Yan. Li Yan is my good friend. She is a beautiful girl. Who's that? The boy in black? It's Jim. He is an English boy. He is very cool. He is my friend, too. We are all in Class 3,Grade 7. I like Jim and Li Yan.
表示氧原子， 
表示氢原子。请回答下列问题。