The article "There are doubts about the value of reading" answers the question.

Studying is expensive. Zhu Xi, a man of the Song Dynasty, said: "Those who have no doubts in reading must have doubts in teaching, and those who have doubts must have no doubts. Only here can they make progress." Chen Xianzhang, a man of the Ming Dynasty, said: "The predecessors said that scholars have doubts. Small doubts will lead to small progress, and great doubts will lead to great progress." Progress. Doubts are the opportunity for enlightenment.”

①Doubt can break superstition. ②Being blindly superstitious about books is a taboo in reading. ③ Mencius said: "It is better to believe in books than to have no books." ④ Therefore, in order to break the superstition of books and avoid falling into blindness, we must be bold in doubting when reading. ⑤Not necessarily everything in books is beyond reproach. ⑥When Xu Xiake, a famous geographer in the Ming Dynasty, was reading the book "Yu Gong", he raised questions about the statement in the book that "Minshan guides the river". ⑦ Later, through on-the-spot investigation, he finally made a new conclusion that the Jinsha River is the source of the Yangtze River, which was a step further than the traditional statement in history books.

Suspect can increase interest. If you can understand your doubts, reading will be of infinite interest. The great scientist Einstein was always interested in reading throughout his life. The important reason was that he always read with questions.

Doubt is often the precursor to gaining true knowledge and the key to the treasure house of knowledge. The famous scientist Li Siguang has a famous saying: "You cannot see the truth without doubting". This sentence is quite profound. Generally speaking, bold opinions and scientific explanations of doubts are often connected together. Questions are raised amid doubts and will inevitably be solved through in-depth research. The solution of the problem is the beginning of obtaining true knowledge and insights. The reason why the famous mathematician Hua Luogeng was able to achieve outstanding results one after another in the field of mathematics was precisely because he was able to boldly identify doubts and scientifically answer doubts based on the formulas, theorems and conclusions found in books. His first step towards climbing the peak of mathematics began here.

Reading is expensive, but the valuable thing is to emancipate the mind, think independently, and dare to explore and pursue boldly. However, advocating reading with suspicion is not based on objective reality and violates scientific principles. You must be able to doubt correctly, make progress when doubting, and be good at doubting. Otherwise, if we do not doubt when we doubt and doubt randomly when we should not doubt, not only will we not gain any knowledge and progress, we will also lead our thoughts astray. This is by no means the academic attitude we should adopt.

1． In this article, the author's point of view is ________. In order to prove this point of view, the author elaborates from several aspects. Please summarize each aspect into one sentence and write it on the horizontal line below.

①________;

②________;

③________.

2. At the beginning of the article, Zhu Xi’s words were quoted: “Those who have no doubts in their studies must have doubts in their teaching, and those who have doubts must have no doubts.” How do you understand the words “doubt” and “doubtless” in this sentence?

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3. "Presenting facts" and "reasoning" are the most common methods of argumentation in argumentative essays. In the second natural paragraph, the sentence that is a logical argument is: ________; the sentence that is a factual argument is: ________. (Just fill in the serial number before the sentence)

4. The famous scientist Li Siguang said: "You cannot see the truth without doubting." Do you agree with this view? Please explain your reasons and give an example to prove your point.

________