"Space technology? I heard you right! Teacher Dong, who was sitting in the second row with glasses, said in surprise. ≦

The younger male teacher sitting next to him, that is, in his thirties, also looked at Bai Dao in surprise: "Does he understand aerospace technology?" ”

The students in the audience were also stunned, and they couldn't react for a while.

For a month, I have been talking about technical knowledge related to electronic products, and now Bai Xiaodao suddenly popped up a space technology and space technology, which really makes people feel like the second monk is confused.

What is space technology? Both the students and the teachers present were confused about this aspect.

Although there are also explanations about space technology in university textbooks, there are also books on space technology in libraries. However, the students here have not seriously studied this knowledge at all, mainly because aerospace technology is too out of step and too impractical for everyone. They didn't go to an aerospace university, so they didn't pay attention to aerospace technology.

"It seems that everyone is very new to aerospace technology! I wonder if anyone has an in-depth understanding of space technology? Bai Xiaodao was not surprised, on the contrary, he had already guessed that it would be this reaction.

Mr. Dong, who wears glasses, is a science and technology teacher who also teaches physics and chemistry. For Bai Xiaodao's course, he was just curious at first, and then it turned into admiration, I have to say that Bai Xiaodao is indeed a genius, no wonder he has such a shocking achievement at such a young age.

In terms of teaching, Bai Xiaodao's style is worth learning from his elders, so when answering questions, Mr. Dong stood up politely like a student and said: "Aerospace technology, also known as space technology, is a comprehensive engineering technology for exploring, opening and using space and celestial bodies beyond the earth, and it is also an important symbol of the comprehensive development level of modern technology in a country. In the past 4o years, the aerospace technology exhibition has been very fast, and it has many characteristics, and here we emphasize three outstanding features. First, space technology is a highly integrated modern science and technology, which is the integration of many of the latest achievements in science and technology, including jet technology, electronic technology, automation technology, remote sensing technology, materials science, computing science, mathematics, physics, chemistry, and so on. Second, aerospace technology is a science and technology that plays a macroscopic role in national modernization and social progress. Due to the fast flight degree and high operating altitude of the spacecraft, it can quickly cover a wide range of the earth's surface. For example, the use of guò satellites has enabled the television network to cover the whole country and the world; Meteorological satellites can make global weather forecasts, including long-range weather forecasts; Reconnaissance satellites can detect military activities in various parts of the world in a timely manner, many of which cannot be achieved by conventional means. Third, space activities are high-investment, high-efficiency, and high-risk undertakings. Despite the high risks, the contribution of space technology to humanity is enormous, and it will therefore continue. ”

"The above is my understanding of aerospace technology, and I am more interested in aerospace technology!" After speaking, Mr. Dong did not rush to sit down, but looked at Bai Xiaodao curiously, wondering if the young man in front of him, who was called a genius scientist, really understood aerospace technology.

"Yes, Mr. Dong can remember the basic introduction of aerospace technology so firmly, which means that he must have had an in-depth understanding." Bai Xiaodao looked at this teacher who was more than ten or twenty years older than himself with appreciation, and had some expectations in his heart, but he didn't know if Mr. Dong had studied aerospace technology, if he had mastered the basic knowledge of aerospace technology, then he would be the aerospace technician that Bai Xiaodao wanted to woo!

"When it comes to aerospace technology, it doesn't matter if you haven't studied it. In life, everyone is certainly no stranger to aerospace technology, such as Dongfanghong Satellite and Shenzhou spacecraft, which everyone should have learned about in high school physics textbooks. Everyone has an impression of the three cosmic degrees, right? Bai wrote the five words "three cosmic degrees" on the blackboard.

A boy immediately stood up in front of Teacher Dong and replied: "The first cosmic degree is called the encirclement degree, the second cosmic degree is called the detachment degree, and the third cosmic degree is called the escape degree." ”

Bai Xiaodao nodded, this boy is estimated to be a memory-type scholar, so he asked, "This classmate, do you remember what the degrees of these three cosmic degrees are?" ”

"This ......," the boy hesitated, and then said awkwardly that he had forgotten.

Many students around looked at the boy with some schadenfreude, and Teacher Dong stood up again and said, "The first cosmic degree is to fly out of the earth, and you can fly around the earth at 7.9 kilometers per second.

The second cosmic degree is 11.2 kilometers per second and can fly around the sun.

The third cosmic degree is 16.7 kilometers per second, which can escape the gravitational pull of the sun and fly out of the solar system.

There is also the fourth degree of the universe, when scientists estimate that when an object has a degree of 11o-12o kilometers per second, it can break out of the banking system and enter other galaxies. ”

It is worthy of Mr. Dong!

Mr. Dong teaches physics and chemistry, and it is normal to know these basic knowledge!

Bai Xiaodao nodded and said: "The fourth universe degree is just a guess by people, as for whether it is right or not, it is still uncertain, but I believe that in a few years, or decades and hundreds of years, this answer will surface, and there will definitely be a fifth universe degree, a sixth universe degree, and so on!" ”

Well? Teacher Dong looked at Bai Xiaodao in shock, I like to hear this!

"Now I'm going to tell you about jet technology in aerospace technology!"

Bai Xiaodao picked up the chalk, he didn't use the projection computer to search for information and put it on the blackboard, because everyone can search for the knowledge found in these computers after class, so he won't waste time doing these useless tricks.

Teaching students with their own knowledge and opinions on jet technology is the right way to educate, which cannot be replaced or compared with textbook knowledge and computer search materials.

"Space jet technology is the most important technology in spacecraft, so ......"

On the podium, Bai Xiaodao explained the principles of jet technology endlessly, and then listed some related techniques and formulas on the blackboard.

This process completely stunned Mr. Dong's eyeballs, and he couldn't imagine that Bai Xiaodao knew so much about aerospace technology! I don't know, I think he is an expert professor in the aerospace industry!

"Okay, let's talk about this class first, and I'll arrange another class in two days, which will explain the knowledge of aerospace technology." Bai Xiaodao breathed a sigh of relief, he was quite tired from class.

"Why did you get out of class so quickly!"

"yes, I haven't heard enough yet! Knowledge of aerospace technology sounds so cool! ”

"It's really fascinating, but it doesn't seem to be useful for us to learn this!"

The students had different opinions, and most of them said that they liked the aerospace technology course taught by Bai Xiaodao. (To be continued.) )8