Wang Dongming a steamed bun, a soybean milk into the teaching area, the pace is slow.

The schoolgirl of the same trade is anxious not to be able to, gnash one's teeth way: "you eat baozi to eat baozi chant, walk quickly not to be able to."

Wang Dongming shook his head: "do you know when I feel most comfortable every day? Even when I have breakfast in the morning, the emperor can't stop me from eating steamed stuffed buns. "

"You look like an old landlord." "If you want to have breakfast more comfortably, you can't get up early and go to the canteen to buy it yourself," she said angrily

"It's not comfortable to get up early just for breakfast. It's a toss."

"Well, I deserve to buy you breakfast?" The girl turned her head with a "hum".

Wang Dongming swallowed one third of the steamed buns, swallowed them hard, and said with a smile, "it's not called toss, it's called... Love..."

Although he is a bold boy, when he speaks this word, he unconsciously uses English and keeps his voice down.

The girl's face brush red, knead way: "you... What nonsense!"

"No nonsense, no nonsense. In fact, I just can't afford to buy steamed stuffed buns. I'm thinking about it. You're not the son of a high cadre. If you wear two or three hundred shoes, I'll let you spend it..." boys who are not shy and don't feel inferior because of money are also rare. This one is more righteous and has Communist temperament.

The girl then asked seriously, "did you spend all the money again? What did you buy? "

"Nothing..."

"He said The girl's finger is on Wang Dongming's waist.

"Really not... Ouch, you're really pinching. Well, I said, I said, I bought two tapes. They were cheap. They were only 10 yuan each, and they cost 30..."

"One set is 10 yuan, two sets are 30 yuan. Wang Dongming, can you cheat me seriously?"

"Two sets are approximate, approximate... Oh..."

"What tape?"

"The country music sung by foreigners is very exciting." Wang Dongming looks like a ruffian.

The girl blushed inexplicably.

The ruffians who play music are not ruffians in this era. They are unruly, talented and high-level talents with a faint aura. The ruffians who can learn music in the 1980s have to have a good family background. It's like asking how much a month's parking space in your community costs. It's a euphemistic background proof, The music players in universities are even more powerful, which is basically equivalent to the Quan second generation with interest, intelligence and perseverance.

Of course, to catch such a boy, it also needs a little bit of wisdom. The girl's little words of pettiness and indignation will lift her hair, more than 200 pieces of Dongdan limited edition calf shoes on the ground, and ask the boy's favorite topic: "what kind of tape do you like so much? What are the lyrics for? "

"What can a foreigner's country music sing? Just like our Chinese village, you robbed my first love, I slept with your sister-in-law, you don't look at my wife, his son looks like me..." Wang Dongming hummed two tunes of American country music.

"Bah, if you talk nonsense again, I won't go with you." The girl walked two steps quickly and decided to be at the door of the classroom. She didn't go any further.

Wang Dongming was so proud that he took a big bite of steamed stuffed bun and said with a smile, "I knew you wouldn't leave me."

As he said it, he stepped over the door of the classroom and then settled down.

"We're in the wrong classroom?" Wang Dongming's mouth is stuffed with steamed buns, and his voice is not mumbling.

"Did you take genomics?" The teacher at the door asked kindly, looking at the steamed stuffed bun in Wang Dongming's mouth, then slightly turned his head: it's too ugly!

Wang Dongming nodded foolishly and asked, "has genomics changed its classroom?"

"No, if you are students in this class, you can go in. If not, don't come in. Do you have your student ID card?"

"I haven't heard of checking the student ID card in class." Although Tsinghua students are good, they are not so good as not to reply.

The teacher laughed and said, "there are too many people coming to class today. If you are not the students of this class, please come back another day."

"Come back another day, can the teacher tell today's lesson again?" Wang Dongming's dissatisfied way.

The teacher said with a smile, "if you have a student card, take it out."

Wang Dongming wiped his mouth and took out his student ID card from his pocket with his oily hand.

It has a wide range of uses. Students, especially freshmen, often carry it with them.

The teacher looked at it carefully, looked for it in the book in front of him, then nodded and said: "the eighth row of four, don't go wrong.""Are there any seats?"

"There will be more seats. Don't talk when you go in. There's a camera The teacher told him to go in.

Wang Dongming was startled by the camera. He came in and saw a big camera in front of the classroom with three legs in the middle.

"There was no camera in the last few classes." Wang Dongming mumbled to the middle of the classroom, found the fourth seat in the eighth row, then looked back at his girlfriend's seventh row, said hello to him, and sat in.

After sitting down and looking at the front and rear rows, Wang Dongming was surprised again.

"Hello, Miss Liu." Wang Dongming found that his biochemistry teacher was right in front of him, so he sat up straight.

"Hello, come earlier next time. Director Yang will have class soon." Mr. Liu didn't know who Wang Dongming was, but he knew that he was a student in his class, so he criticized him.

Wang Dongming nodded obediently, then looked down at his watch: 7:55. It's five minutes before class.

Wang Dongming couldn't help but feel bad in his heart: originally, the big class at night was so good. After dinner, two people had class together, and after class, they could send the girl back to the dormitory in the dark... In the morning, it felt completely different. OK, and which singer went to bed before 12 o'clock in the evening? It's killing to get up more than seven in the morning.

Looking around, Wang Dongming was even more frightened by two teachers who were familiar with or unfamiliar with him.

"What's the matter?" Wang Dongming is not sure.

After a while, Yang Rui pushed the door in and was slightly surprised to see the scene in front of him.

However, Yang Rui didn't know how many times he had to face the camera. He calmly started the class and said, "today, we will focus on cloning and PCR, and introduce the methods used to study single gene in the pre genome era. After that, I will focus on the research methods dedicated to genome. After class, you can compare the differences and advantages and disadvantages of the two methods. As an homework, we haven't assigned homework yet. "

"No The students answered with one voice.

Yang Ruile cheerfully said "good". He thought that the freshmen were really clever. At the same time, he consciously or unconsciously faced the camera and said: "in the 1970s, molecular biologists used a set of mature tools to study DNA molecules, although the classical genetic method is the only way to study a single gene, But many basic discoveries in molecular biology are also made in this way. For example, the operon theory proposed by Jacob and Monod in 1961 describes how the expression of some bacterial genes is regulated, which is probably the greatest achievement in the field of genetics in this era... However, the limitation of classical methods is that they can not directly detect genes, that is, all information about gene structure and activity, It's all inferred... In the late 1960s, these indirect methods were not enough to answer the detailed questions of single gene expression put forward by molecular biologists... At this time, DNA recombination technology appeared. "

When Yang Rui said this, many experts and professors unconsciously raised their heads.

The classical genetic method is actually the main method, or even the only method, used by many scholars in their research.

Of course, everyone knows that this is the technology of foreign countries in the 1960s. However, you can only use this method or only have the technical conditions in this respect.

At this time, Yang Rui's naked classical genetic method is not enough, and has been eliminated by DNA recombination technology. Many people can't accept it emotionally in the first place.

Some people even complain: what's the matter? I can't do better with old technology.

However, when the complaint touched Yang Rui in his eyes, it disappeared quietly.

After so many days of understanding, we have long been familiar with Yang Rui's research work, and we can't be familiar with it any more. As far as scientific research itself is concerned, no one dares to speak out to Yang Rui in the field of genetics at this moment.

Besides, there are cameras.

In the classroom, the undercurrent is surging.

The scene was calm.

……