Of the following statements about the Golgi apparatus, mitochondria, and chloroplasts, it is true: "

"A. All three are found in cyanobacteria."

"B. All three contain DNA."

"C. All three are places where ATP is synthesized"

"D. The membrane structure of all three contains proteins."

......

The test papers are sent down.

Su Mu directly chose option D in the first multiple-choice question.

The main components of the Golgi membrane are proteins and lipids, and the inner and outer membranes of mitochondria are composed of phospholipid bilayers in which proteins are inlaid with them. As for the chloroplasts of plants, there are a lot of proteins on the inner membrane that are special catalytic enzymes.

The test paper is as simple as ever.

The answer is clear at a glance.

Su Mu even felt that it was meaningless to come up with this kind of question that could be understood at a glance.

The comprehensive science and liberal arts of the college entrance examination is the one with the largest score among the four exams.

Science refers to physics, chemistry, and biology, while liberal arts refers to history, geography, and politics.

In recent years, various provinces have been carrying out college entrance examination reforms one after another, wanting to get rid of the Wenzong and Lizong models, but according to the current situation, these provinces that rely on the national paper are still being devastated by the Lizong and Wenzong.

The total score of the test paper in Su Mu's hand now is 300 points, 110 points in physics, 100 points in chemistry, and 90 points in biology.

The score looks enticing.

And a lot of the questions are very simple.

However, Su Mu's concentration on this test question is much higher than that of other subjects.

Taking mathematics alone as an example, Su Mu is 95% sure of getting a full score.

However, even if Su Mu won the full gold medal of the five major science competitions, he still does not have much confidence in getting all the points.

In every exam, there are always a few mistakes that are judged.

It's not that I'm not careful, but because in biology and chemistry, sometimes after thinking too much, there will always be one or two ambiguous answers.

The multiple-choice questions in the science complex are scored highly.

6 multiple-choice questions in Biology, 7 multiple-choice questions in Chemistry, and 8 multiple-choice questions in Physics.

Each question is worth 6 points, which is equivalent to half a math problem, of which the last three multiple-choice questions in physics are multiple choices, 6 points for all of them are correct, 3 points for the correct but not all of them, and 0 points for the wrong one.

This score is really, really high.

For example, if you just filled in a D and got six points, and if these six points are mathematically...

Well, mine is not very different for Su Mu.

But for ordinary candidates, if they make so many mistakes, even if they do well in the fill-in-the-blank questions in the back, the score will not be able to pull up.

After a slight glance, there are no particularly biased questions in the multiple-choice questions of this year's comprehensive theory, and many of them are basic questions.

Su Mu breathed a sigh of relief slightly.

If all of them are basic questions, Yan Xiaoke's pressure will definitely be much easier, and Xiaoke's foundation has always been very stable.

It took about seven or eight minutes, and when other exams were still entangled in the probability of biological genetic infectious diseases, Su Mu had already completed all the multiple-choice questions in the three subjects of physics, chemistry and biology.

The first multiple-choice questions are arranged in order of biology, chemistry, and physics, and the next major questions are generally sorted by physics, chemistry, and biology.

The physics questions and electives are not very difficult.

"Huh?"

When it came to chemical impurities, Su Mu was a little embarrassed.

"High-purity manganese sulfate is used as a raw material for the synthesis of nickel-cobalt-manganese ternary cathode materials, which can be prepared from natural manganese dioxide powder and manganese sulfide ore (also containing Fe, Al, Mg, Zn, Ni, Si and other elements) in industry, as shown in the figure below."

"The first step of MnS ore and MnO2 is to obtain filter residue 1 by adding sulfuric acid leaching, the second step is to add MnO2 for oxidation, the third step is to add chlorine water to adjust the pH value to the filter residue 2, the fourth step is to add Na2S to remove impurities step 1 to obtain filter residue 3, the fifth step is to add MnF2 to remove impurities step 2 to obtain filter residue 4, the sixth step is to add NH4HCO3 for sinking, and finally MnCO3 is obtained, and under the conversion of sulfuric acid, the required high-purity manganese sulfate is obtained."

Chemistry is not easy to get rid of in high school.

It's very simple when it's simple.

But if it's difficult, if it's a little biased, it will even make people scratch their heads.

Although this question looks very simple, Su Mu feels that the difficulty is generally higher than that of the monthly exam!

The first few questions are not too much of a problem.

The composition of filter residue 1 can be seen at a glance as S and the insoluble silicate SiO2.

The chemical equation is also not a big problem, and it can be written at a glance:

MnO2+MnS+2H2SO4=2MnSO4+S+2H2O

The purpose of impurity removal 1 is to remove Zn+ ions and Ni2+ ions, and the main components of filter residue 3 are NiS and ZnS.

But the last two three-point fill-in-the-blank questions.

It's a little more cumbersome.

One reason for the incomplete precipitation of Mg2+ is examined.

The answer to this reason is that the concept of electrolysis was examined.

The other is based on valence, which is a little more complicated to calculate.

Layered nickel-cobalt-manganese ternary materials can be used as cathode materials for lithium-ion batteries, and their chemical formula is LiNixCoyMnzO2, in which the valencies of Ni, Co and Mn are +2, +3 and +4, respectively. When x=y=13, find the value of z.

Of course.

It only took Su Mu 30 seconds to get the result, and the answer was 13.

But these two questions are indeed more difficult than ordinary miscellaneous questions!!

There are a lot of questions in the whole comprehensive test paper, and if ordinary candidates are stuck in a certain place for too long, it is easy to have not enough time in the future.

In addition to the miscellaneous questions, the difficulty of the other major chemistry questions in the back is generally higher.

In Yan Xiaoke's science comprehensive, biology is the strongest, physics is second, and chemistry is the worst.

And this time in the exam.

Chemistry is significantly more difficult than the other two subjects.

Thinking of this, he couldn't help but be a little worried.

But fortunately, except for chemistry, there is nothing special to pay attention to in the biology in the back, and about an hour or so into the exam, Su Mu has already finished writing all the answer sheets.

You should be able to score more than 296 points on this paper.

There are only two ambiguous fill-in-the-blank questions, and Su Mu is not so sure.

The remaining two hours.

Once again, he fell into endless solitude.

There is a boy in the front left who is stuck in the first big problem of physics, and he is struggling with it.

Su Mu smiled, that guy had read the topic wrong.

Naturally, it will be stuck somewhere.

In the front right is a girl, and the girl's physics question is directly vacant.

Su Mu was slightly stunned.

The physics question is so simple, there are still people who can't write it?

Isn't the answer a three-fifths of a seven-fifths and a two-fifths of a five?

That girl looked well-behaved and clever, Su Mu thought she had a good academic performance, but she didn't expect that she couldn't even write this question.

Finally.

When Su Mu was about to be bored to vomit blood, the bell rang for the end of class.

Handing in the papers and leaving the scene in one go.

Today is another day full of vitality.

......