Xueba, I beg you to go and escort him quickly!

She doesn't even believe it herself.

"I finished watching? Is it over? Is this gone?"

Surprised and slightly disappointed.

"No, I remember there is another question, which makes me ambiguous!"

After searching, I finally found the question.

"A multiple-choice question given to me by my roommate! Xu Heng, I'm not sure what to choose, can you help me look?"

Pass it to Xu Heng.

topic:

There is a fixed vertical baffle on a horizontal ice surface. An ice skater faces the baffle and stands still on the ice. The direction is pushed towards the baffle, and the athlete gains retreating speed.

The object collides elastically with the baffle, and the speed is reversed. When catching up with the athlete, the athlete pushes the object to the baffle again, making it elastically collide with the baffle again at a speed of m/s.

After a total of 8 times of pushing the object in this way, the athlete's regression speed is greater than m/s, and the rebounding object can no longer catch up with the athlete.

Neglecting the friction force on the ice surface, the mass of the athlete may be ( )

A.48KG

B.53KG

C.58KG

D.63KG

After Xu Heng finished reading the questions, he looked at Yue Pingting again, "Which options are you ambiguous about?"

Yue Pingting, "BC!"

Xu Heng, "That's right, it's BC. I've seen this question before. It's a multiple-choice question."

"According to the law of conservation of kinetic energy, the final mass of the athlete can be obtained between 52KG and 60KG."

Yue Pingting froze for a moment, "So this is a multiple-choice question?"

Xu Heng, "Be confident in yourself! Now that you have calculated the correct answer, why do you still doubt yourself?"

Yue Pingting's scalp was numb, "No, no, no! Not everyone is like you! When you encounter this situation, your first reaction is that the topic is wrong, and we can only think that we are wrong!"

As he said aggrievedly, Han Honghu drove back in his car.

Get out of the car.

The first thing Han Honghu took down was not the rice paper, but the wine!

"Mr. Xu, when I was buying rice paper, I met an event, buying rice paper and giving away wine! I bought more paper!"

As he spoke, Han Honghu took down the wine bottle by bottle.

He also doesn't care about his straight suit, so let's get dirty!

Yue Pingting was dumbfounded, "Boss Han, how much rice paper did you buy?"

This girl really believed Han Honghu's words.

……

PS: Thank you for the support of [Kajiang is not Jianjiang] [lz Tianhui] [PerfunctoryErrors] [tail number 2739] [Grumpy Rabbit] [tail number 6475]!I wish you a fortune!Full of peach blossoms!

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Chapter 145

"11... 12... 13... Why are there more? Boss Han, how much paper did you buy to send so much wine?"

Yue Pingting was stupid.

Although she didn't understand, Xu Heng was still very clear.

On the surface, what Han Honghu said was nothing more than a formality, but in fact, Han Honghu knew that Xu Heng could understand what he meant.

Buy rice paper and send Moutai!

No matter how you think about it, this is impossible!

But it happened that Han Honghu said it out, even he himself didn't believe it, could Xu Heng believe it?

This is what Han Honghu bought specially to please Xu Heng!

Xu Heng looked around and asked, "What kind of wine?"

Han Honghu didn't believe that Xu Heng didn't recognize that it was Moutai.

So he thought what Xu Heng asked was not about the type of wine, but the grade of the wine.

Han Honghu smiled and said, "Old cellar, it has been stored for decades."

Xu Heng probably looked it up, and there were not a few thousand, but tens of thousands.

And there are 20 bottles of these!

Xu Heng's eyes lit up, good guy, he is really willing to spend money!

Finally, Han Honghu took out the rice paper.

"Some were too big to fit in the car, so I didn't buy them! But I bought the raw, cooked, and half-cooked ones! Teacher Xu, look at it!"

Xu Heng, "Uh... I mean whatever you want, not everything."

Han Honghu quickly explained, "It doesn't matter, it doesn't matter! Anyway, I bought everything, and the rest, Teacher Xu, can be used by myself!"

Xu Heng roughly touched the rice paper and knew it.

This rice paper is also a relatively good one.

"Ms. Xu, is this the table? What size do you need?"

Xu Heng, "Give me a six-foot wide open."

"it is good!"

Han Honghu complied immediately.

It is fully opened six feet, and the size is 180*97, which is the largest rice paper he bought!

Han Honghu was secretly delighted!

Teacher Xu, awesome!

Immediately sent a message to my boss, "Boss! The biggest size! Teacher Xu used the biggest size I bought! Six feet wide open!"

Just when Han Honghu was excited, Xu Heng found a paintbrush from the room.

With just one glance, Han Honghu was stunned, and the excitement on his face disappeared instantly.

This pen is used, and it's still used, and it's just thrown away. The ink sticks to it and dries up.

"Forehead……"

The corners of Han Honghu's eyes twitched fiercely.

This is too random!

Teacher Xu, you don't need to be so shivering, right?

You can't use such a pen to draw such a good picture, right?

"Ahem! That, that... Mr. Xu, is this the pen? Do you want to change it?"

Xu Heng glanced at Han Honghu, "Just this one! Pingting, help me take it and rinse it with water, then find a small bowl and fill it with clean water!"

And Xu Heng went to find the black ink.

Han Honghu opened his mouth wide!

He had talked to his boss and seen famous artists painting.

They are very particular about everything, including pens, inks, papers and inkstones, and the brushes are even better.

But here is Xu Heng.

Why use the rest?

There are still some bristles!

It is said that if a worker wants to do a good job, he must first sharpen his tools!

But Xu Heng's paintbrush, no matter how you look at it, makes people feel unreliable!

Han Honghu's heart tugged together.

He has no idea!

And it's almost five o'clock!This painting, can I finish it today?

"hiss……"

Inadvertently, Han Honghu frowned.

As for Xu Heng, his behavior was ordinary.

Yue Pingting cleaned the brush and brought some fresh water.

When Xu Heng found the ink, he started using it without brewing or hesitating.

Some ink!

pen!

Suddenly, darkness spread across the rice paper.

Han Honghu almost yelled "I rely on", but his reason told him that it couldn't be like this.

In his heart, he crazily hinted at himself:

"This must be a random writing, it must be looking for a feeling, it must be! Otherwise, Teacher Xu would not have written so hastily!"

"It must be so..."

"definitely is……"

"must……"

"must!"

But Xu Heng didn't mean to stop at all!

After scribbling on the drawing paper, he did not change the paper, but was very serious and kept his eyes on it.

In Han Honghu's view, Xu Heng's reckless actions are just "scribbling" something!

And Xu Heng moved east and west!

Han Honghu was puzzled.

He has seen many painters paint!

Although some of the paintings are messy, there are still traces to follow!

For example, painting a mountain, there is a shape of a mountain here, but Xu Heng's painting, he can't understand it at all.

It is not an exaggeration to say that he thinks that his own children can draw better than Xu Heng.

Nima!

what's the problem?

Han Honghu looked at the corners of his eyes twitching fiercely, he raised his head with a helpless expression on his face.

On the contrary, Yue Pingting was looking forward to it.

She didn't even dare to blink her eyes!

She was afraid that if she blinked, Xu Heng's painting would suddenly become a landscape painting!

She wants to witness the birth of this painting.

Han Honghu couldn't help it, went to the bathroom, and sent a message to Huan and his boss, "Boss, I don't think Mr. Xu can draw this painting today!"