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Class 2 and 3, Luo Ran is in the examination room.

The comprehensive science paper places physics, chemistry and biology on one test paper.

Therefore, this tests the candidates' allocation of time and energy.

When facing the test questions in three subjects at the same time, it is particularly important to adapt to the change in problem-solving thinking.

The comprehensive science exam not only tests the academic level of the candidates, but also is a great challenge for the candidates' psychological quality.

"Dingling--"

The exam bell rang and the comprehensive science test paper was sent.

Luo Ran still maintained her usual style and read the whole article as soon as she got the test paper.

"Well? There seems to be no change in the question types and quantity of each subject this time?"

Luo Ran frowned slightly, and she read it carefully again, confirming that it was no different from the previous comprehensive science papers.

Suddenly, she glanced at the scores of each question and said in her heart:

"I understand, so that's it!"

The scores of the comprehensive science paper this time are different from those in the past. The scores of physics test questions are generally greater than those of chemistry and biology.

In other words, the scores for chemistry and biology are somewhat "shrinkable" when the number of test questions remains unchanged.

It is obvious that not only Luo Ran discovered this. Almost all candidates realized that physics is the top priority of this comprehensive science paper!

To capture the thief, to capture the king first, to solve the problem, to solve the physics problem!

However, it is no difference for Luo Ran to solve which one to first.

This could not arouse her interest at all. She originally thought with great expectation that there would be a new type of question in the comprehensive science paper this time.

The result is that?

Luo Ran was very disappointed, and the consequences were very serious!

Swish! Swish! Swish!

Luo Ran quickly wrote a, c, c, d, b in the brackets behind the multiple-choice questions...

Almost everything is done in seconds. After reading the questions, the answer will naturally come out.

Even, she could know how this question would be answered from the alternative answers of the 4 options!m.

"Three shorts and one longs and one longs and one shorts and one shorts and choose shorts. If you don't have longs and no shorts, choose c..."

Luo Ran suddenly recalled that after every exam before, the students would summarize the so-called [rules] of multiple-choice questions.

When you encounter questions you are blind, in order to save exam time, people will often quickly confuse the answers based on this word-of-mouth [rules].

"It's true that the accuracy of this rule seems to be... quite high?"

After finishing all the multiple-choice questions, Luo Ran suddenly became interested. She was actually counting and analyzing the answers to these multiple-choice questions.

Then, she immediately compared the rumored answer [Rules]. Hiss! If you really follow this law and fool around, you can actually achieve a 20% accuracy rate!

You know, this is a random answer that can be written without looking at the question! The accuracy rate of 20% is already quite high.

The set time for the entire comprehensive science exam is 150 minutes, which is equivalent to 2 and a half hours. Luo Ran only took half an hour to complete all the questions.

This half hour also included her bored statistics on the accuracy rate of [rules].

If you calculate it carefully, it only took 20 minutes.

At this point, when other candidates were still sweating and suffocating to solve the problem, Luo Ran had already ended her model journey "early"!

During this period, although there was a small episode of the mathematics exam that almost missed the exam, overall, this exam was a surprise for Luo Ran.

Time passed slowly, and the clock on the wall finally walked slowly to 15:30 under Luo Ran's expectation.

"Hu!" Luo Ran exhaled a long sigh and sat in the seat for two hours. Luo Ran felt that she was numb. Immediately, she was about to get up and leave the seat.

At this moment, a sudden change occurred! An examination inspector suddenly hurried in from outside the examination room.

He held a rolled-up bucket in his hand and took out a bundle of rolled test papers from it.

After handing it to the invigilator on the podium, he whispered a few words in his ear before leaving.

"Well, what's going on? The time has come, why haven't the exam been announced yet?"

Luo Ran felt strange in her heart. She seemed to see from outside the window that the inspector leaving had a nearly substantial solemn face.

At the same time, in the No. 1 Middle School, Experimental High School, Foreign Language High School, Ivy High School...

All the high school entrance examination rooms that participated in this first-model joint examination were the same as those in No. 2 Middle School.

"Students, stop writing!"

"Please keep quiet in your respective seats, we will collect the rolls."

Soon, all the candidates' papers were collected. The imagined exit was not spoken from the invigilator.

"Students, this is the physics expansion question given to everyone by the first mock-designed question."

"From now on, you have half an hour to solve the problem."

"The score of this question is 2 small questions in total 30 points! It is directly included in the final total score of this mock exam and participate in the city ranking!"

As he said that, the invigilator handed over the test papers he had just sent to the students present one by one.

It is not accurate to say that it is an exam paper. Strictly speaking, the exam paper in everyone's hand is actually a piece of A3 copy paper.

The above questions are not machine-made, it is obvious that the questioner hand-made and then temporarily printed.

Luo Ran stroked the paper with his hand, as if he could still feel the residual heat of the printer ink cartridge...

She quickly glanced over and confirmed that only one question was written on the paper, which was the value of this question was 30 points!

You should know that all the questions in each subject of chemistry and biology are only 90 points in total. And the single physics question in front of you has 30 points!

In addition, physics itself was given 120 points in the comprehensive science, and now, the total score of physics has reached 150!

The total score of this mock joint examination also soared from 750 to 780 because of the sudden appearance of expansion questions!

Almost at the same time, all the candidates began to review the questions with a passionate look, ready to try.

Even if you only get one or two points, you can surpass a thousand people when ranking in the city.

One point difference, a thousand people’s distance!

Luo Ran took a deep breath, his eyes gathered on the paper, and began to review the questions:

[We know that there are some Samsung systems in the universe far away from other stars and consist of three stars of equal mass. At present, two basic composition forms of stable Samsung systems have been observed:

1. Three stars are located on the same straight line, and two stars orbit around the central star in a circular orbit with a radius of r;

2. The three stars are located on the three vertices of the equilateral triangle and run along a circular orbit connected to the equilateral triangle.

Now, it is better to assume that the mass of each star is m, and ignore the gravitational effect of other stars in the universe on them, and solve it:

(1) Under the first form, the period of astral movement;

(2) Under the second form, assuming that the movement period of the star body is the same, what should be the distance between the star body?]

Luo Ran was suddenly shocked! Astrophysics - [Samsung Motion System]!

She still clearly remembers the finale of the just-passed National Olympic Physics Competition,

Astrophysics - [Dual Star Motion System], that is the finale of the Olympics! And it is just a double star.

But now, at the last moment when the first model joint examination is about to end, this question that was temporarily added is about [Samsung Sports System]!

Although there is only one extra star in the literal way, the difficulty of the question has undergone a qualitative change!

Suddenly, the geometric multiples improved, and this kind of question appeared in the exam for senior high school students.
Chapter completed!