下列关于细胞学说的叙述，错误的是（      ）

(B)

    It's Sunday morning. There are many people in the park.and some boys are playing basketball. There are some girls under a big tree. They're singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat. Who's she? She's my mother. She is talking to Lin Feng. Lin Feng is her student. He is a good student．He studies hard．He's good at all the subjects. And he's friendly to all his teachers and his friends.

You really don't have to worry           your weight. You look just right.