God of black technology

"Here?" Director Xu looked at Wang Yun who walked into the office and said, "Yesterday I finalized your class. If you don't pass the exam today, then you can't do it." Then, Director Xu opened the drawer, Take out the middle school exam questions from the junior high school.

Wang Yun put down his schoolbag, sat opposite Director Xu, and said with a smile, "Don't worry, I will definitely not let you down."

"I hope so." With yesterday's experience, Director Xu took out the test papers that were only issued by the teachers of the ninth middle school this year. If they were not students who graduated from the ninth middle school, it would be almost impossible to see them.Moreover, who would ask a student who graduated from ninth middle school to ask for the junior high school mock test paper to deal with him.

Therefore, Director Xu is very relieved.

Putting the test paper in Wang Yun's hand, he frowned and said, "No, you can do it, just like yesterday, it will take one morning. If you can pass the test, I will bring you to see the head teacher in the afternoon."

"Okay." Wang Yun took a pen and looked at the paper that Director Xu handed over. The first thing that caught his eye was the physics test paper.

He made a good body, and then went through all the questions in the test paper.After thinking for a while, I started to do it.

【first question:

Which of the following physical quantities is closest to reality is ()

A．人体的正常体温约37℃B．人体的安全电压是不高于1.5VC．正常人心脏跳动60次约需1hD．中考体考所用的实心球质量约10kg

This is easy, choose A. 】

This question is too simple, but I want to see if the candidates can combine physics and life.

[The worker uses the movable pulley as shown in the figure to lift the object weighing 1000N vertically by 5m at a constant speed within 1s, and the person is on the free end of the rope.

The pulling force F is 600N, ignoring the rope weight and friction.Which of the following conclusions is correct ( )

A．The useful work of the movable pulley is 600JB.The gravity of the movable pulley is 400NC.The mechanical efficiency of the pulley is 83.3%

D．Rally F has a power of 120W

This question is not difficult, choose C]

After doing it one by one, Wang Yun found that there were no particularly difficult questions, even the last big one, it seemed that it was not difficult.

After everything was done, Wang Yun put the paper in front of Director Xu and said, "Director, I'm done."

The director was stunned for a moment, looked at Wang Yun, blinked his eyes, and didn't recover for a while.

"Just finished?" Director Xu took a deep breath and looked down at the paper. He found that the paper was densely filled with answers, and the A4 draft paper given to Wang Yun was also full of calculation formulas.It seems that Wang Yun is not fooling him, but really finished writing.He raised his wrist and looked at the time.

Even less than an hour, if it wasn't because I really learned the knowledge and grasped the knowledge points extremely firmly, it would be impossible to do it so quickly and smoothly.

Of course, Director Xu is not a professional physics teacher, so it is impossible for him to correct Wang Yun now.He glanced at Wang Yun, "Aren't you going to check?"

"No, no need." Wang Yun shook his head and said, "I think it's quite simple, there shouldn't be any mistakes or omissions."

"That's fine, you can continue to do the chemistry paper." Director Xu read the paper slowly, and occasionally glanced at Wang Yun who was doing the chemistry paper.He found that the student was working extremely hard on the paper.Nodding in satisfaction, he put down the physical paper and started doing his own thing again.

[Sea water is an important natural resource. The following is a partial utilization of sea water resources in our city.

（1）从海水中获得氯化钠。将海水进行可得到粗盐；为除去粗盐中含有的Na2SO4、CaCl2、MgCl2等杂质，其中加入BaCl2溶液除去的物质是；

The substance removed by adding NaOH solution was .

(2) Obtain metallic magnesium from seawater.The diagram below is a simple process for extracting magnesium from seawater.

（1）从海水中获得氯化钠。将海水进行可得到粗盐；为除去粗盐中含有的Na2SO4、CaCl2、MgCl2等杂质，其中加入BaCl2溶液除去的物质是；

The substance removed by adding NaOH solution was .

(2) Obtain metallic magnesium from seawater.The diagram below is a simple process for extracting magnesium from seawater.

（1）蒸发结晶Na2SO4MgCl2（2）Mg（OH）2

MgCl2 energized Mg+Cl2↑]

In less than an hour, Wang Yun's chemistry paper was also finished and handed over to Director Xu's desk.Staring at Wang Yun, Director Xu said slowly, "Are you sure, aren't you checking?"

"No need." Wang Yun shook his head, "There is nothing to check, it's just some basic knowledge."

"It seems that you still have confidence in yourself." Director Xu smiled and looked at Wang Yun.

"Yeah, I don't think I have confidence, but I think I might not be as bad as I imagined." Wang Yun looked at Director Xu with sparkling eyes and said, "Look, Director, can I go to see the head teacher?"

"You can read a book here for a while." Director Xu took out a high school mathematics textbook and threw it to Wang Yun. This is a set of high school textbooks that he went to the warehouse to pick up yesterday afternoon, and it just comes in handy now. "Whether you can pass the test or not, you have to wait for a while." Director Xu stood up and walked out with two papers, "I am not a teacher who teaches chemistry and physics. I will ask the chemistry teacher and physics teacher to correct the papers. After the examination paper, I will know whether you can go to see the head teacher."

If Wang Yun really doesn't have much difference between chemistry and physics, he can go directly to high school, and he should be able to keep up with the rhythm of the teacher's explanation.

If his grades are better, I am afraid that the ordinary class will not be difficult for him, and he can even handle it with ease.With that in mind, Director Xu walked out of the office.This time he didn't go to the junior high school, but went directly to the high school.

Seeing that none of the teachers in the office had gone to class yet, he went directly to Teacher Chen Wan and said, "Mr. Chen, here are two papers. Please ask your physics teacher and chemistry teacher to correct them."

Teacher Chen Wan took the paper, looked at it carefully, and froze in place.

What the hell?Ask him to ask his physics teacher and chemistry teacher to correct his junior high school papers?He was about to ask, but Director Xu gave him a look, leaned into his ear and said, "This is the test paper for the new students in your class. I personally supervised the test."

Teacher Chen Wan understood. Looking at the test paper full of answers, the handwriting was not very good-looking, but he didn't look like an idiot who got zero points in the test.Is this really the legendary poor student?

No matter how you look at it, it looks like it was written by a middle school student, right?

"Ms. Wang, Mr. Liu, you are all here." Mr. Chen warmly greeted Mr. Wang of Physics and Mr. Liu of Chemistry. The two teachers showed puzzled expressions together, "Mr. Chen, what's the matter?"

"Here are two papers, one for physics and one for chemistry." Teacher Chen said rather embarrassedly, "Director Xu asked me to let you two correct it."

Teacher Wang nodded. Originally, he had no classes, and correcting papers was not a difficult task, so he directly agreed.And Teacher Liu said dumbfoundedly, "How about this, Teacher Chen, I have to go to class later. You put the paper on my desk, and I will correct it after class. What do you think?"

"That's fine." Teacher Chen directly put the chemistry paper on Teacher Liu's desk. At this time, Teacher Wang returned to his seat with the paper. He took a look and was stunned.

This is a junior high school paper. He is a high school teacher correcting junior high school papers. It's almost... Teacher Chen Wan came over at this time. Teacher Wang turned to look at Teacher Chen Wan and said, "Old Chen, are you sure this is the director?" A paper for me to grade?"

"I'm sure." Teacher Chen nodded hurriedly and said, "I'm very sure." In fact, since Teacher Chen knew that this was the test paper of a freshman in his class, he also wanted to know what the level of this freshman was.He urged Teacher Wang, "Hurry up and change it, I'll see how many points I can get."

"Why do I feel that you are more anxious than the director?" Teacher Wang couldn't stop crying, picked up the red pen and began to correct.Teacher Chen is a mathematics teacher. Although he doesn't know much about physics, he still knows a little.

After reading the questions one by one, he didn't see any mistakes or omissions.

No, didn't it mean that this guy's poor foundation is the best in the entire Ninth High School?Why did he look at it, this guy's foundation is actually very good?

"Full marks." Teacher Wang said with a slow breath, "This paper is not difficult, but the knowledge points are dense. A person who can get full marks in junior high school can be regarded as a person with very good academic performance. Even at the stage of the first year of high school , I believe they are not much worse than those in the top class."

Teacher Chen Wan obviously didn't believe it. He glanced at Teacher Wang in surprise and said, "Old Wang, don't lie to me."

Teacher Wang sneered, looked at Chen Wan and said, "What did I lie to you, why don't you come and find the mistake yourself?" At this point, Teacher Wang shook his head again, "It's just that the handwriting is a bit poor, it's easy Points deducted."

"It's just poor handwriting?"

"Hey, old Chen, what's going on with you today?"

"No, nothing." Chen Wan hurriedly shook his head, and rushed to Director Xu's office with the paper.

"Really, this old Chen seems to be a different person today." Seeing Chen Wanyuan's back, Teacher Wang muttered, and the English teacher next to him looked at Teacher Wang and said, "Brother Wang, you don't know ?”

"Ah?" Teacher Wang looked at the English teacher in a daze and said, "What do you know?"

"Oh." The English teacher shook his head. This English teacher is a young teacher who has just graduated from school, and he is quite easy to talk to on weekdays.She just likes to gossip, so Teacher Wang hurriedly sat up straight, looked at the English teacher, and asked, "What is it? It's mysterious."

"Hey, it's not a big deal, don't we have to teach the third class?"

"correct."

"This class three has another transfer student here." The English teacher is also surnamed Liu, and is called Teacher Xiao Liu by the students.Teacher Wang was a little sluggish, "The monthly exam is coming soon, why is there another student transferred from Class [-] all of a sudden?"