21 Belling Street, what a strange street name......

Xia Yu inquired all the way to this prosperous but not messy, obviously high-end business district place, and it didn't take long to walk to No. 21, but in front of him was not a residence, but an open courtyard pavilion, but there were no business signs, and occasionally people came in and out.

You won't fool me into playing, will you?

Xia Yu tried to get up and asked a staff member who was obviously wearing a standard uniform: "This big brother, what is this place?"

"What are you doing?" the man said in a low voice.

"I want to find Qu Yuru to teach. ”

"Come in," the man said busily patting him on the shoulder, pointing inside, "It should be about to begin!"

What the hell?

But it didn't sound dangerous, Xia Yu walked through the porch, and when he entered the door, he found that it was a hall of dozens of square meters, which contained some organs and equipment, as well as some tables and chairs, and twenty or thirty young people were chatting in groups of three or five, and they didn't look like ordinary family children in terms of dress.

He was about to step forward, when suddenly a middle-aged man in his early forties with a black face stood up and said to everyone: "Sit down, it's about to start!" and looked at Xia Yu outside the door again, "What are you doing in a daze, come here!"

"I'm looking for Qu Yuru to teach......" Xia Yu felt a little strange.

"Don't talk nonsense, the assessment rules have changed this year, no matter who you look for, you have to pass the basic assessment, hurry up and sit down for me!"

Okay, Xia Yu looked left and right, still found an empty seat to sit down, and then someone sent a mess of paper to everyone.

When I took it over, it seemed to be a set of test papers.

"Okay, give everyone an hour to answer the questions, the first objective questions are not allowed to be empty, the final subjective questions depend on the situation, but you can't hand in a blank paper, hear no! I still say that, no matter who you look for this year, no one will want to pass if you don't meet the standard!"

No one in the audience spoke, and even a few obviously dandy-looking ones began to read the test papers seriously.

It's all because they owe favors, or they spent a lot of money to get this opportunity, and they don't have face when they are driven home or brushed down, even if they are hard-headed, they have to answer.

Besides, they don't really have no foundation, and they have already obtained a complete question bank when they come to this training class, at least they are still somewhat sure of the objective questions.

Xia Yu...... Didn't move.

He was already attracted to the topic at hand.

"What are the three basic principles of constructing a return structure source array?"

"To manufacture the classic Z-structure power source box, which of the following ways are the solutions to improve energy efficiency?"

"Which of the following materials can increase the output efficiency of a flood serial structure?"

"What are the properties of a helical source array in general?"

"Which of the following is wrong about the statement of the four Orange Leaf Organ Divine Masters of the Federation?"

......

After roughly scanning it, there are a total of 50 questions on the first two pages, which basically cover the basic knowledge of various fields of organ art, including some common sense of the history of the organ continent, classic problems about the structure of the classic source array, and some practical content.

Although all of them are objective questions, to answer these questions, a relatively comprehensive basic knowledge is required.

And this is exactly what Xia Yu lacks most at this moment.

Seeing that the young people around him began to answer the questions, Xia Yu picked up the written test and checked the answers, but his eyebrows were furrowed tighter and tighter.

It's really hard!

Although I have been holding several journals these days, I have gradually gained a general understanding of the main development areas and preface research directions of the current mechanism technique, but even the simplest "Popular Mechanism Technique" is a reading material for 3-star mechanism masters, and it is impossible to popularize the mature mechanism source array and basic historical knowledge that have been finalized.

However, even if it was a little difficult, Xia Yu did not have the slightest frustration, but read them carefully one by one, and chose the answer after his own thinking.

It's also a form of learning.

After all, he is not at the level of entering this world for the first time, although he is not sure of many things, but he also has his own set of serious thinking logic, so it is better to answer it according to his own ideas.

Anyway, I don't know what this ghost test does!

Call!

After the 50 objective questions were finally completed, Xia Yu exhaled lightly and wiped the sweat from his forehead.

Some topics, especially those on mechanical structures, are not very difficult for him, the knowledge of the earth is there, and after a few months of cultivation of the mechanism system, he has a little grasp of these problems.

But some of the topics did give him a headache.

For example, in terms of the history of federal organs, such as all kinds of strange materials, especially desolate beast materials, and some classic source array theorems and common sense that have been concluded and are obviously "sending points......

After calculating, Xia Yu found that he could only roughly guarantee that six or seven of the 50 questions were answered correctly, and half of the remaining forty or so questions were deduced by Meng, and half were deduced with logic that he didn't know if it was right or not.

It looks like it's going to be hard to pass......

However, he didn't have any burden in his heart, and turned the last page of the test paper relaxedly.

The last question of this inexplicable test appeared in front of his eyes.

It was indeed the last question, because the whole page was clean, with only one question and one picture.

Xia Yu was slightly stunned, and a trace of nervousness flashed in his eyes.

It was a simple diagram of a nested spiral source array that it had heard of, but hadn't actually seen, with some annotations of the source array symbol clusters.

The problem is to roughly deduce the output energy characteristics, functions, precautions, etc. according to this structure, which is an open question.

However, like the perceptual cyclone in the mind, the source array structure is essentially an energy construction form, so it is impossible for the plane figure to truly depict its essence, but it is only the most basic schematic.

For those familiar with this structure, the "nested spiral structure" on the title is sufficient.

But it wasn't enough for Xia Yu.

Even if there is the ability to derive "derivative space", at least one basic model needs to be built before subsequent deduction can be carried out.

It would be nice to look at the source box of this structure......

Seeing that many of the people around me also made the last question, but few hesitated to write the book, it was obvious that they were all familiar with this structure.

What to do?

Forget it, I don't know what the use of this inexplicable exam is anyway, so it's better to give up......

At this moment, a voice sounded: "Mentor Dragon, can I apply to see the source box example......?"

Xia Yuxun used to be a young man with a noble bearing, and his identity was obviously not simple.

"I said, this is an exam! It's an official exam! I really don't know how those few teachings teach you, and the half-month assault hasn't even laid a solid foundation for this!" The black-faced middle-aged tutor roared twice, but finally softened, "Forget it, I won't bother to care about you in the future anyway, who else wants to watch it, give you a minute, and move quickly!"

"I'm going to see it too!"

"And my ......"

Seeing that the mentor turned his back, Xia Yu also stood up quietly.