1. Thinking begins with questions and surprises. -Aristotle

2. It is more important to ask questions than to solve them. -Einstein

3. There is no doubt that if you are a student, you will make progress if you doubt, small doubts will make small progress, and big doubts will make great progress. -Lu Jiuyuan Song

4. The problem is the midwife, which can help the birth of new ideas. -Socrates

5. Scholars must be skeptical first. -Cheng Yi

6. Question, not question, "A real singer can sing the silence in people's hearts". -Chai Jing

7. Doubt is the beginning of thinking and the end of learning. -Confucius

8. Those who are suspicious and not suspicious have never learned; Learning requires doubt. -Zhang zai

9. in the depths of people's hearts, there is a deep-rooted need to be a discoverer, researcher and explorer. In children's spiritual world, this need is particularly strong. -Suhomlinski

1. Questioning is the first step towards philosophy. -Diderot

11. You can't see the truth without doubt. -Li Siguang

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

13. Questioning customs from all aspects is an inevitable development stage for everyone with a higher level of thought. -Emerson

14. There is no doubt that the key to all science is a question mark. -Balzac

15. 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

16. The ear has no bottom, and you can hear from morning till night. -Africa

17. 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

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

19. A good questioner 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"

2. He who is good at doubting does not doubt what others suspect, but what suspects do not doubt. -Fang Yizhi

21. Learn from questioning, and make friends to analyze doubts. -Li Xing