Ninety percent of the students who chose the Department of Science and Technology were boys, and now there are 51 students in the class, of which only 4 are girls, and these 4 girls are all average-looking, so it is no wonder that people often say that almost all girls in science classes are women.

Bai Xiaodao chose a seat in the last row and sat down, and soon a teacher in a tunic walked in majestically, he was a typical retro person, even his hairstyle and movements were exactly the same as those of the leading secretary decades ago, especially the pair of round-framed glasses, which could be said to be antique.

This teacher in his forties is called Kangqiao, and his name is exactly the same as Kangqiao in Xu Zhimo's "Farewell Kangqiao", this name is quite poetic and easy to remember, but it is easier to be ridiculed by others......

Writing the word "Kangqiao" on the blackboard, Mr. Kangqiao stood on the podium facing everyone with a stern face, he put his hands behind his back, stood up like a javelin, and said in a loud voice: "My name is Kangqiao, and I am now your counselor. Although the study in the university is relatively free, in my class, you only need to remember two points, the first is not to be late or leave early, and the second is not to do content that is not related to the course! If there is a violation, then it will not be used to attend my class in the future! Let's start with the first group and briefly introduce yourself! ”

As soon as Mr. Kangqiao finished speaking, the expressions of the others became a little unnatural, and it seemed that they knew that this was a teacher with a very bad temper, but they chose this major, and everyone didn't complain much.

Soon, it was Bai Xiaodao's turn to introduce himself, but before Bai Xiaodao could speak, Kang Qiao frowned and took the first step and said: "This classmate, you don't sit in so many seats in front, why do you want to sit in the back?"

Do I like it? Bai Xiaodao was also drunk, but out of politeness and respect for his elders, he still stood up and said, "Report to the teacher, I don't like crowded positions, this place can help me better calm down and think about problems."

"Well, can you see the blackboard?" Kangqiao asked in a flat tone.

"Report teacher, my eyesight is very good! I can see the two moles on your forehead side by side! After Bai Xiaodao finished speaking, the other students in the class noticed that Mr. Kangqiao really had two small black moles on his forehead that were four or five centimeters apart.

"Introduce yourself!" Kangqiao said helplessly, thinking that this kid's eyesight is really amazing, and if he is engaged in this kind of technical research, this eyesight can play a very good aid.

"My name is Bai Xiaodao, I'm from Tianhai City, I hope you will take care of me!"

Well? It turned out to be this kid, and he was really different, I wonder if it was really as Director Cui said? Kangqiao secretly thought in his heart, he had heard of Bai Xiaodao, the champion of liberal arts, and what made him most curious was that Director Cui said that this guy had a deep understanding of the knowledge of mathematics, physics and chemistry in college, so Kangqiao's curiosity was suddenly stimulated, and what he couldn't understand was that if Bai Xiaodao's mathematics, physics and chemistry grades were so good, then why did he choose liberal arts in high school?

In short, students with good grades are wonderful, and this sentence is not bad at all.

Bai Xiaodao's brief self-introduction was a sensation, and everyone turned their heads to look at Bai Xiaodao sitting in the last row with some curiosity, wondering why a champion of liberal arts would appear here?

In the Department of Science and Technology Studies, this is very esoteric knowledge of mathematics, physics and chemistry, and even science students with excellent grades are difficult to understand the knowledge points. What's more, liberal arts students didn't learn this knowledge in high school, so everyone couldn't understand whether Bai Xiaodao, a liberal arts student, was embarrassed?

However, there is one person who doesn't think it, that is Pang Jiayu, who is sitting in the first row in the middle, he is Bai Xiaodao's old classmate, and he is also the person who knows Bai Xiaodao best.

Pang Jiayu is the sixth student in the total score of the science college entrance examination in Huatian No. 1 Middle School, with a total score of 651 points, and it is already very good to get this score in science, but Pang Jiayu's score is only in the upper middle of this group of people, and there are many people with higher scores than him.

In addition to Pang Jiayu, there are also two of these people who are classmates of Huatian No. 1 Middle School, and they naturally know the legend of Bai Xiaodao, the most sensational thing is that Bai Xiaodao won the top prize in the two grades of arts and sciences in the monthly examination, and under the guidance of Bai Xiaodao, 52 of the 61 students in their class had a college entrance examination score of more than 500 points!

Before this, the third (2) class of high school was an ordinary class with most of the scumbags, but under the leadership of Bai Xiaodao, the overall results of their class were better than the two top classes in Huatian No. 1 Middle School.

After everyone introduced themselves, Kangqiao suddenly wrote a question on the blackboard: Why is the lightning rod made in the shape of a needle?

"Can anyone explain?"

Ma Xuedong glanced left and right, he wanted to stand up and answer, but he was worried that he would lose face if he didn't answer well, he also had some understanding of the principle of lightning rod, but he couldn't organize the answer he thought was perfect in his mind for a while.

Everyone fell silent, and no one seemed to want to be the first to eat the crab.

"Bai Xiaodao, you can answer." Kangqiao looked at the white knife sitting alone at the end, and asked questions directly.

"Heh, this guy is really unlucky." Ma Xuedong smiled secretly, in his opinion, Bai Xiaodao would definitely not be able to answer this question.

"During a thunderstorm, when there are charged clouds over a tall building, a large amount of charge is induced on the lightning rod and the top of the tall building, because the needle of the lightning rod is pointed, and when electrostatic induction, the tip of the conductor will gather the most charge. In this way, the lightning rod gathers most of the charge, and the lightning rod forms a capacitor with these charged clouds, because it is relatively sharp, that is, the area of the two poles of the capacitor is very small, and the capacitance is very small, that is to say, it can hold very little charge. And it gathers most of the charge, so when there is more charge on the clouds, the air between the lightning rod and the clouds is easily broken down and becomes a conductor. In this way, the charged cloud forms a path with the lightning rod, which in turn is grounded. A lightning rod can channel the electrical charges from the clouds into the earth, so that it does not pose a danger to high-rise buildings and ensures its safety. To put it simply, air becomes a conductor, so that large-scale lightning strikes are converted into small-scale electrical discharges. ”

Bai Xiaodao told the story, although this is a common sense of life, but it is very knowledgeable, many people are ambiguous about the principle of lightning rod, even these science tyrants sitting there, can not explain in such detail as Bai Xiaodao.

"That's a good answer, please take a seat!" Kangqiao nodded with satisfaction, and the other students clapped their hands one after another.

was robbed of the limelight by the white knife, Ma Xuedong suddenly had a black line on his face, thinking that he would answer first, although he couldn't go into too much detail, but the general meaning could still be expressed.

"Hey...... With such a mentally retarded problem, I don't even bother to use the ring computer. ”

In his eyes, this question is as simple as eating and sleeping, and he can answer it casually. xh:.74.240.212