某同学用如图所示器材探究“凸透镜成像规律”，此时光屏上成清晰的像，下列说法不正确的是（　　）

一个分数的分母缩小5倍，分子不变，分数的值（   ）。

一位学者说：“不会抑制自己的人，就是一台被损坏了的机器。”可见，学会调节自己的情绪很重要。下列同学调节自己情绪的做法可取的是（   ）
①小红和同学发生误会，用诙谐的语言打破僵局，平息怒气
②小天被老师批评后，故不认真听课，意发泄子心中不快
③小甘考试遇到难题，浑身紧张，用深呼吸的方法放松自己
④小伟与父母发生矛盾，自己感到委屈，，就乱摔东西，以泄不满

The Volleyball Club

    The school volleyball club wants new members! We have good players from the school team. They can help you enjoy the game. We practise for an hour every afternoon from Wednesday to Friday.

    Go to your PE teacher and buy sports shoes if you want to be with us.

Girls' Volleyball Match

    Team: No.1 Middle School vs No. 2 Middle School

    Time: 2:30 p.m.—4:30 p.m., October 21st

    Place: Xuzhou Sports Centre

    Come for our school team. We have twenty tickets (票) for every class. Go to your PE teacher for the tickets before Friday.

    Please wear your school uniform (校服) at the sports centre.