"Hey, Xiaoxiao, what are you putting in it, so heavy?" Cheng Nuo asked curiously.

"Nothing, just some snacks. Su Xiaoxiao waved her hand and said calmly, without a little blush.

"Snacks?!"

Cheng Nuo opened his schoolbag and looked at it. Wow, there's so much to it all in.

Potato chips, preserved fruits, shrimp crackers, melon seeds, pistachios, drinks......

The small bag was full of snacks. The rest of the sunscreen, sanitary napkins and other necessary items for girls to climb the mountain, but there is not a single one. Almost all of the space was given to snacks that made Su Xiaoxiao look like a treasure.

The attributes of a foodie are fully exposed on Su Xiaoxiao's body.

"Hey, Cheng Nuo, you wait a minute. ”

Under Cheng Nuo's gaze with a black line on his face, Su Xiaoxiao took out a generation of potato chips from the bag, tore them open without hurry, and chewed them with squinted eyes.

"Cheng Nuo, do you want to eat?" Su Xiaoxiao looked up at Cheng Nuo.

"Well, no. Cheng Nuo was speechless and stuffed his bag into his hiking bag.

Cheng Nuo turned his head and smiled and said to Mu Leng, who was standing with Su Xiaoxiao, "Mu Leng, give me your bag too." ”

"Huh?" Mu Leng was stunned for a moment.

"I said, give me your bag. Cheng Nuo repeated, "I'm afraid that you will be very tired from climbing the mountain for a while, so I will relieve you of some of the burden." ”

Mu Leng hesitated, nodded and handed the bag to Cheng Nuo.

"Well, thanks. ”

It's not easy, it's not easy! Cheng Nuo burst into tears. Goddess Mu finally said "thank you" to herself. The corners of Cheng Nuo's mouth opened unconsciously. To others, it looks like a silly smile.

Cheng Nuo directly ignored Mu Leng's slightly strange gaze, and diligently put Mu Leng's bag into the mountaineering bag.

So far, the weight of Cheng Nuo's backpack has reached 10.23 kg.

"Let's go!!"

Under Jiang Qingqing's order, a group of thirteen people set off from this mountainside at an altitude of more than 400 meters. Target, the summit of 1132.74 meters above sea level!

Seven boys, four at the front of the line, three at the back of the line. Six girls walked in the middle of the line, so that they could take care of each other.

Cheng Nuo and Hao Shuai, as well as two other boys, were at the front of the team.

Su Xiaoxiao held a bag of potato chips, and looked around curiously with a pair of big bright eyes. Like most people, it was her first time climbing the mountain.

"Mu Leng, look at that cherry blossom so beautiful!"

"Wow! There are peach blossoms here! It looks so beautiful!"

"That mountain is so high, so magnificent!"

Su Xiaoxiao was like a lark, chattering non-stop.

Mu Leng was not bored, his cold eyes looked around, and there was a faint smile on the corner of his mouth.

Due to the consideration of the girl's physical strength, the four of Cheng Nuo, who were in front of them, did not dare to go too fast.

"No, I'm tired, let's find a place to rest!" After climbing two or three hundred meters, everyone's initial excitement passed, but was replaced by a deep sense of tiredness.

The boys' physical strength is not bad, and the feeling is not so obvious. But the girls are different, one after another shouting tired.

There was no way, everyone found a place to rest, drink saliva, and eat something to replenish their state.

The sun hangs high in the sky, and it is noon. The sun was blazing on the earth, and the air was scorched and distorted.

Cheng Nuo found a rock to sit down, then stood up suddenly, rubbed his ass and scolded, "Damn, it's so hot!"

Cheng Nuo took off the outer layer of jacket and put it under his buttocks, so that he couldn't feel the slightest heat from the chrysanthemum.

Cheng Nuo held a bottle of mineral water in one hand and a piece of chocolate in the other hand and chewed it in the other.

Suddenly, Cheng Nuo caught a glimpse of a small figure touching him and sitting down.

"Whew!"

The small figure jumped up with a bang. , flexible like a rabbit.

"Why is it so hot...... Su Xiaoxiao was about to cry directly. Cheng Nuo consciously moved his butt to the side to make way for Su Xiaoxiao.

Su Xiaoxiao sat on the jacket, pulled Cheng Nuo's hiking bag to his side, and squinted his eyes and took out all kinds of snacks from the pink schoolbag.

"Cheng Nuo, do you want to eat?" Su Xiaoxiao asked again.

"No need. I have something to eat. Cheng Nuo smiled and shook his head.

After a break of about ten minutes, the group continued on their way.

Soon, a group of thirteen people came to one of the famous attractions of Luoshan - the glass bridge. A bridge made entirely of glass. It is said that the glass bridge took a total of two years and cost more than 100 million yuan to build.

"Wow! It's a glass bridge!"

"It's really a glass bridge, it's so beautiful, I wanted to come and see it before!"

Several girls let out a series of exclamations.

Cheng Nuo's gaze also swept over the glass bridge.

It is 300 meters long, 2.64 meters wide, 723.24 meters above sea level, 6.58 centimeters thick, and has a maximum load capacity of 1,200 tons......

Although the glass bridge is called a glass bridge, it does not shatter when stepped on like glass. In fact, although the hardness of the glass bridge is not as good as that of the cement bridge, the hardness is definitely not small. Even if the entire 300-meter bridge was full of people, it would not collapse.

But...... Except in one case.

When Cheng Nuo saw the scene on the glass bridge, his eyes suddenly froze.

As it is the May Day golden holiday, there are not a few climbers. But scattered over the entire boulder peak at an altitude of more than 1,000 meters, people appear to be scarce.

At this time, walking on the glass bridge, except for the scattered two or three tourists. There was another team.

There were 24 of them, all young girls in their twenties, dressed in uniform clothes, standing in a row on the glass bridge of more than 300 meters.

A videographer stands at the front with a video camera.

The leader of the group was a beautiful young girl who shouted, "Three, two, one!"

C mile C mile zile zile alerg~~

Mary Marie Mile Mile pe Maidan~~

The familiar magical music sounded, and twenty-four young girls danced on the glass bridge to the same rhythm as the music. Wave your hands, tuck your abdomen, and shake your hips. And the photographer also dutifully recorded all this.

These people from Class 18 were also watching with relish from the bridge, and they forgot to move forward for a while.

It's just Cheng Nuo, and the data in his eyes is constantly changing.

The natural frequency of the glass bridge is ...... The frequency of exercise for one person is ...... The frequency of two-person exercise is ...... Twenty-four people exercise at a frequency of ...... (Note 1)

A set of data is entered into the brain of the process.

Cheng Nuo exhaled lightly, fortunately, the worst situation he imagined had not happened.

However, Cheng Nuo felt that he needed to remind them.

Because, once that kind of thing happens, these more than 20 people on the bridge will definitely die without a place to be buried.

At that time, there is no need to say anything C-mile-C-mile, just change it to grave jumping!

..................

Note (1): The formula for calculating the natural frequency is: A=(k/m)1/2×2∏

Can you understand it?