2. People who don't ask will always be with ignorance. -East Africa

3. Questioning customs from all aspects is an inevitable development stage for everyone with higher ideological level. -Emerson

4. The key to all science is undoubtedly the question mark. -Balzac

5. Those who have no doubt about reading must be taught to have doubts, and those who have doubts must have no doubt. Only here can they make progress. -Zhu Xi

6, the ear has no bottom, you can hear from morning till night. -Africa

7. People who are inquisitive have only made five kinds of fools; He who is ashamed to ask questions will be a fool all his life. -anonymous

8. The spirit of doubt is an important part of the scientific spirit. -Zhou Guangzhao

9. A inquisitive person is like tackling a difficult problem. The first one is easy, the second one is self-restraint, and it takes a long time to explain. He who is not good at asking questions is the opposite. -"Xue Ji"

1. Those who are good at doubting do not doubt what others suspect, but what suspects do not doubt. -Fang Yizhi

11. Learn from doubts and make friends to analyze doubts. -Li Xing