Quick time travel: Did the big villain succeed in chasing his wife today?

After eating hot pot, everyone went out to hang out together.

This place is unfamiliar to them, and it is safer to act together.

Nightlife has begun to enrich and diversify.

Barbecue stalls, snack streets...Occasionally passing by one or two milk tea shops, there are long queues.

Yang Fan ran to buy two mango smoothies.

The mango smoothie has a strong fruity aroma, and the delicate smoothie melts in the mouth, bringing a different feeling.

They are not the origin of mangoes, but they have nationally famous peaches.

Peach smoothie, this is good, I recommend it when I go back.

The prosperity of the big city attracted this group of children.

"You study hard, and you will go to Haishi and Jingshi to study in the future. They are even more beautiful there."

Teacher Su's words, like a seed, took root in the hearts of these students.

Back to school, there is still one week before the midterm exam.

There is no problem with the provincial competitions, so isn't the midterm exam a piece of cake?

One day, Yang Zhenzhen was writing a topic, a person came over and stood beside her.

Looking up, it turned out to be Zhang Yihua.

"Yang Zhenzhen, are you free? I want to ask you a question."

"can."

This is a physics problem.

?The main advantage of the popular digital camera is full charge: 200ma/4.2v, 2.5h can directly generate digital photos, which can be easily edited and processed, and the storage time is longer.And digital photos can also be displayed directly on the computer, or sent out by e-mail.

On the right is some information about the battery of a digital camera.Answer the relevant questions based on the information provided and the following introduction to the working process of a digital camera:

(1) After the power of the digital camera is turned on, it is in a standby state, which consumes a certain amount of power; when shooting, the power consumed by shooting and processing data is even greater.Assuming that a fully charged battery is used as a power source to take pictures, one picture is taken every 5 minutes, and the average working current of the camera during use is 0.2a. Please estimate how many pictures a fully charged battery can take at most.

(2) What is the efficiency of fully charging a battery of this type that has been completely exhausted?

"This question, first..."

"Let me come, you can ask me." Yang Fan had just returned to the classroom when he saw... Zhang Yihua standing next to Zhen Zhen, striding over.

"Brother, sit down first." Yang Zhenzhen looked at Yang Fan's hand that was holding down Zhang Yihua, the corner of her mouth twitched.

Yang Fan glanced at Zhang Yihua suspiciously, sat down on his seat, but still stared at the two of them.

"Energy efficiency ratio = cooling capacity / input power..."

"I understand, thank you." Zhang Yihua took the notebook and left.

Yang Fan turned to look at Zhen Zhen, "Since when did you have such a good relationship with him?"

"Isn't it just a question, how do you know that the relationship is good?"

"He has a very weird personality, don't get too close to him." Yang Fan lowered his voice.

"I see."

"When will the results come out?"

"It's only been two days."

Sure enough, Teacher Su asked the students to call their office.

"Yang Zhenzhen No.1. Yang Fan No.3, Zhang Yihua No.9, Yi Tian No.15, Nie Ting No.20 seven."

The entire province enrolls 50 students, and she teaches five classes.

This result made Teacher Su overjoyed. In previous years, only five students from his school were selected, but this year, eight students were able to go to Beijing to participate in the competition.

The remaining three are lower in the ranking.

After the joy, Teacher Su began to feel melancholy again.

Those whose grades are ranked below the middle, do they want to go to Beijing to participate in the national competition?

The probability of winning a prize is very small, and I won't win a prize by then, and my high school entrance examination results are not satisfactory.

This is about the future of the students, so we must be cautious.

"Zhenzhen is really good this time!"

"It's a fluke."

"Luck matters too."

"Congratulations to everyone, you are all great!"

"The next national competition, whether you want to participate or not, go back and discuss with your parents before making a plan. By the way, the school will cover accommodation and travel expenses."