Both of them were dressed in the simplest white clothes and black pants, looking at the audience calmly and calmly, and their works were also sent to the stage, a palm-sized tape recorder.

"What's that?" Chen Mu glanced at it and muttered.

An Huai: "It looks like a radio. ”

"Radio?" Chen Mu twisted his eyebrows, "What does the radio have to do with their works?" They couldn't have made their own radio, could they? Then this is not called an invention, at most it is called a reproduction, and there is nothing new. ”

"Do you think Ji Yue will be uninspired?" An Huai asked rhetorically.

Chen Mu remembered that Ji Yue repaired the remote-controlled plane last night, and was silent, it was really impossible, and this kind of direct reproduction of the work could not enter the semi-finals.

"I want to see what Su Qingyun's work is?" Offstage, Tang Ling held her hands neatly, with a sarcastic face.

"Didn't she say that her work was no worse than ours? I've been looking forward to it for a long time. Zhang Xia also sneered and said, she has been waiting.

On the judges' seat, the chief judge looked at the two tall teenagers, nodded with a smile, this looks full of energy, that's it, you have to have absolute confidence in your work.

"Ready to get started?"

"Ready." Su Qingyun and Ji Yue nodded in unison.

The presiding judge motioned for the two to start, and the grim man who was sitting at the very edge quietly winked at Su Qingyun and cheered.

Su Qingyun smiled slightly and successfully received the signal.

"Judges, contestants, good morning, we are the eighth group of contestants, I am Su Qingyun."

"I'm Ji Yue."

After the two briefly introduced themselves, they went straight to the point.

Su Qingyun smiled, pointed to the cassette recorder that Ji Yue picked up and said slowly: "As you can see, our work is this small machine in the hands of my partner, everyone may think that this is an ordinary radio, but in fact, we call it a cassette recorder." ”

Tape recorders? This novel word immediately caused a commotion in the audience, and everyone had the same puzzled expression, what is the cassette recorder?

Chen Mu and An Huai sat up straight, waiting for the two of them to explain next.

"The cassette recorder is a new machine that we have developed on the basis of the function of the radio, in addition to taking into account all the functions of the radio, the most remarkable function is that it can record the sound and then play it, whether it is an ordinary human voice or beautiful music, it can be recorded and played perfectly, in addition, ......"

The speed of her speech was not fast, but everyone listened very carefully, and with her explanation, Ji Yue began to demonstrate the various functions of the recorder on the side.

"As we all know, the working principle of the radio is to demodulate and restore the high-frequency signal received from the antenna into an audio signal, and then send it to the headset to become a sound wave, and finally play it, to put it bluntly, the radio is a small radio receiver."

"These are the functions of the radio, but what we need to do is the recorder, and the first problem my partner and I had was how do we record the audio? How do I store my audio? Later, we finally figured out that the working principle of the radio of the tape recorder is achieved by the magnetic effect of electric current, and the playback is the effect of electromagnetic induction. ”

"After having these theoretical foundations, we began to experiment, in which we encountered all kinds of difficulties, such as storing audio things, I thought of tapes, which have been born for decades, but are less used in our country, and we started experiments, using tapes to store audio......"

Hearing this, Yan suddenly realized, no wonder when he was in the research institute before, Su Qingyun asked them where they could get the tape, fortunately, they had it in the research institute, and it turned out that it was used here.

The deeper Su Qingyun explained, the more serious the listeners became, and on the judging table, the review experts kept nodding, they had ideas and abilities, these two children are good!

As for the other contestants, most of them didn't understand what she was saying at all, and they were confused and confused when they heard what electromagnetic induction and magnetic heads.

What does this mean? Are they really in the same race? Why is there such a big gap between people?

Chen Mu's eyes widened, he pricked up his ears and didn't want to miss any of Su Qingyun's words, An Huai also listened carefully, Su Qingyun's explanation could probably be understood by both of them, but because they could understand it, they understood the power of the two of them, a work of this level of tape recorder, is it really what they should appear in this kind of competition?

What is this not crushing? The two sighed in their hearts, it was not their turn yet, and the two had already compared their works with the tape recorder in their hearts, and they had an immediate opinion.

Tang Ling and Zhang Xia were already stupid, with their brains, they couldn't understand what Su Qingyun said, and they didn't understand anything about it, and their hearts beat drums.

Zhang Xia swallowed her saliva, remembering what Su Qingyun said before, she didn't seem to be ashamed......

Su Qingyun spoke for about twenty minutes before finishing, Ji Yue made a brief addition to her content, and the two cooperated tacitly and methodically, obviously discussed earlier.

The whole process of explanation is logical, well-organized, and ends perfectly.

After speaking, the two stood quietly on the stage waiting for the judges' comments, and the chief judge praised again and again: "It is worthy of the work that we noticed early in the morning, you expressed it very well, the whole work was also very good, very thoughtful, and also had the ability to turn your own ideas into reality, I can say that the tape recorder is a very important invention." ”

"Thank you, teacher." Su Qingyun and Ji Yue nodded in thanks.

"But I want to ask you a question." The chief judge smiled and said, "Since you can make a tape recorder, you must have thought about what to use the tape recorder for, right?" ”

"Yes, we thought about it."

"Tell me about it." The main judge was very curious.

Su Qingyun thought for a while and said: "The cassette recorder is made on the basis of the radio, first of all, it has all the functions that a radio should have, so listening to various programs is its indispensable function, in addition, I think you can also burn the audio to the tape, and then play it in the cassette recorder." ”

"That way, the usefulness of the cassette recorder will be greatly improved, such as recording things, listening to music, and even burning the content of our textbooks for students to learn, and so on."

The chief judge listened carefully to Su Qingyun's thoughts, and his eyes became brighter and brighter, in this way, the tape recorder can be used in all aspects of people's daily life, entertainment and learning.

Su Qingyun smiled slightly, in fact, when she first decided to make a tape recorder, she considered the practicality of this thing, she not only wanted to use the tape recorder to win the competition, but also to let people with vision see the commercial value of this thing, this is her ultimate goal, otherwise, if it is to show off her skills, she can make more incredible things, but those are not enough for the market to pay, and she can only see that things that cannot be used are useless.

The chief judge was obviously very satisfied with Su Qingyun and Ji Yue's group, and he looked left and right, "Do you have anything else you want to add?" ”

Yan Yan, who had been silently beside him, spoke, "Qingyun, Ah Yue, when will you have time to go to our research institute to help?" ”

As soon as these words came out, the chief judge was angry and funny, good guy, this kid is the one who openly poached himself in their competition, is he a little too bold?

Su Qingyun also said helplessly: "This judge, what can we communicate privately." ”

Her serious appearance made everyone laugh, and the chief judge said happily: "Grim, if you dig someone next time, you have to notify me, I have to go and see, can't you always let your institute touch our light, right?" ”

This is once and a second time.

Grim had to nod, "Of course, of course, you can come at any time." ”

They are talking and laughing here, and the other players and teachers below have already listened to the stupidity, what do you mean to go to the institute to help again? Can these two contestants on the stage actually go to the institute to do things?

Chen Mu gasped, he finally understood why Su Qingyun and Ji Yue knew each other severely, they used to be colleagues in the dare, and listening to his tone, it seemed that he was begging these two people to go, who are these two people? Is it that powerful?

However, he glanced at the tape recorder in Ji Yue's hand, and had to admit that it was really powerful.

Chen Mu and An Huai glanced at each other, and they both saw the shock in each other's eyes, now it's okay, I don't know how many chances there are for their works.

They are not the only ones who have such thoughts, in addition to the seven groups of players who have appeared in front of them, the faces of the remaining twelve groups of players have changed, with such a jewel in front, where is there room for competition in their works? Isn't this a gift for others to compare?

Tang Ling and Zhang Xia are also one of them, better not to die, the two of them are the number one behind Su Qingyun and Ji Yue, and the two who originally wanted Su Qingyun to pave the way for them turned pale, and their own works behind them would make the judges feel how big a gap they had, and the two of them didn't dare to imagine it.

Of course, Su Qingyun and Ji Yue didn't know that everyone in the audience had different thoughts, and the two waited until the judges finished scoring, and then stepped off the stage, and the two returned to their positions, and Teacher Qin, who had been hanging a heart, finally let go of her heart and breathed a long sigh of relief, but she was scared to death.

Although the current results have not yet been announced, and everyone doesn't know what their score is, but thinking about it, Su Qingyun and Ji Yue thought that the score of a group must be very high, and the hearts of the players behind them were even more hanging.

"Invite the ninth group of contestants to the court." The judges called.

Tang Ling and Zhang Xia of the ninth group got up with trembling legs and slowly lifted up, even if the two tried their best to calm down, but it was useless, and when they stood on the stage, their faces were as white as paper and trembling like chaff.