根据短文理解完成下列各题。

School Rules

There are some school rules in Shuren Middle School. The students have different ideas about them. Let's have a look.

Jack: Some of them are too strict— Don't give a call between classes. Don't ride a bike at school.

Lucy: I don't think some of them are good— Don't be late. Don't eat food between classes. Girls can't wear miniskirts in summer.

Maria: Some of them are good for our study and life— Keep the classroom clean every day. Boys' hair must be short. Girls' long hair must be tied up (扎起来). Wear school uniforms on school days.