The first question of junior high school is mainly the second question, which is a bonus for being f

Solution: (1) Set up a month before the introduction of the policy to sell manual and automatic cars are x, Y units, according to the theme, get.

x+y=960x(1+30%)+y(1+25%)=1228 to get {x=560y=400.}

A: In the month before the policy was introduced, 560 manual and 400 automatic vehicles were sold

2) The subsidy amount for manual vehicles is: 560 (1+30%) 8 5%=10,000 yuan);

The subsidy amount for automatic cars is: 400 (1+25%) 9 5%=225 (10,000 yuan);

Answer: In the first month after the policy was introduced, a total of 10,000 yuan was subsidized to these 1,228 car users

1.The manual and automatic vehicles sold are A and B, respectively

a+b=960

a(1+30%)+b(1+25%)=1228 a=560 b=4002.The subsidy amount for manual cars is: 560 (1+30%) 8 5% = 10,000 yuan);

The subsidy amount for automatic cars is: 400 (1+25%) 9 5%=225 (10,000 yuan);

10,000 yuan).

Variant] (1) Method 1: If the manual cars sold one month before the policy is x, then the automatic cars are (960 x), and the title can be obtained: (1 30) x (1 25) (960 x) 1228

Solution: x 560,960 x 960 560=400 Therefore, the number of manual cars sold in the month before the policy was 560, and the number of automatic cars was 400

2) (560 8 400 9) 5 404 (10,000 yuan), so: in the first month after the policy was introduced, a total of 4.04 million yuan was subsidized to these l228 car users

1.According to the first meaning: I am very him, and the second should be called the definite clause in line with the original meaning!

2.Because it is easy to be confused with a straight line!

3.A point that divides a line segment into two segments equally!

4.Nepenthes is a tropical insectivorous plant that feeds on insects.

5.According to the cell structure: nuclear membranaceous plasma, etc.

6.It should be in the late Qing Dynasty and early Republic of China.

7.The Battle of Changping was the earliest and largest encirclement and annihilation battle in the history of our country. This war, which took place between Qin and Zhao, the two countries with the most powerful ability to unify China, suffered a devastating blow to Zhao, greatly surpassing Qin's national strength over contemporaries, and greatly accelerating the process of Qin's unification of China.

The number of participants in the battle was 450,000 in the Zhao army, and the conservative estimate of the Qin army was also more than one million. From national strategy to specific tactics, military strategists have been gaining and losing until now. The Battle of Changping had a profound impact on the direction of Chinese history, and it gave birth to the first feudal centralized empire in Chinese history.

Another TV series has taken this name.

Lian Po, (327 BC – 243 BC) was an outstanding military strategist of Zhao during the Warring States period. At the end of the Warring States Period, the famous generals of Zhao State, together with Bai Qi, Wang Jian and Li Mu, were called the "Four Famous Generals of the Warring States". The main activities were during the reigns of King Huiwen of Zhao (298-266 BC), King Xiaocheng of Zhao (266-245 BC), and King Mourning Xiang of Zhao (245-236 BC).

Lian Po Tomb, located in the southwest slope of Jijiaying Fangniu Mountain, Bagong Mountain, Shou County, Anhui Province, commonly known as "Po Gu Dui".

The gist of the original text is to the effect that if we set up a suspicious array in the midst of suspicion and cause contradictions to arise among the enemy, we will be foolproof. To put it more colloquially, it is to skillfully use the enemy's spies to my advantage. In warfare, it is very common for magic to use spies.

8.A class of biological macromolecules composed of nucleotides or deoxynucleotides linked by 3,5-phosphodiester bonds. It has very important biological functions, mainly to store genetic information and transmit genetic information.

There are two categories: ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).

It's all my own play, plus points! How was your middle school?

1："very "It is an adverb, and when modifying a verb, it should be placed after the verb;

2: Because rays have directions, and 1 letter cannot indicate the direction;

3: The midpoint is the point at which a line segment is bisected;

4: Polyps are animals, thank you....What we usually call coral is the carcass of coral; As for Nepenthes, it has a cell wall, it has vacuoles and is capable of photosynthesis, while no animal or fungus has the above functions....So it can only be a plant, for more information, it is recommended to check the Internet;

5: Of course not, because there are no chloroplasts on the root cells of plants, and prokaryotes such as cyanobacteria can also photosynthesize (prokaryotes are different from plants), but prokaryotes rely on chlorophyll and not chloroplasts for photosynthesis, but there must be no chloroplasts in animal cells;

6: I don't know.

7: Lian Po: The main figure of the general Xianghe, General Zhao Guo; Battle of Changping:

Zhao Kuo, the general of Zhao State, fought a decisive battle with the Qin army in Changping, but because Zhao Kuo could only talk on paper and had no actual combat experience, the Zhao army was defeated, and the strength of Zhao was greatly reduced, and there was no longer the strength to resist; The anti-plot is that Cao Cao sent his subordinate Jiang Gan (Zhou Yu's old friend) to Zhou Yu's military camp to steal military information before the Battle of Chibi during the Three Kingdoms, but was discovered by Zhou Yu, but Zhou Yu did not say it, but secretly wrote a "surrender letter" of Cai Mao and Zhang Yun (Cao Jun Naval Army General), and put it in his pocket, at night, Jiang Gan took advantage of Zhou Yu's sleep, secretly rummaged through Zhou Yu's pocket, hoping to obtain secrets, but turned over the "surrender document", and mistakenly thought that they really wanted to surrender, immediately returned to Cao Cao's military camp, and reported the matter to Cao Cao, Cao Cao immediately ordered Cai Mao and Zhang Yun to be beheaded. Therefore, Zhou Yu took advantage of the enemy's spies and killed the two generals of the Cao army without a single soldier, which directly decided the victory of the Battle of Chibi. Therefore, it is called an inverse meter;

8: Nucleic acid is the genetic and transmission information material of the cell, which is divided into ribonucleotide (RNA) and deoxyribonucleotide (DNA), the former mainly plays the role of information transmission in the cell, mainly in the cytoplasm, and the latter mainly plays the role of genetic information, mainly in the nucleus. Viruses contain only one of RNA or DNA, and viruses with RNA as genetic information are mostly highly infectious, such as SARS (SARS), HIV (AIDS), and viruses with DNA as genetic material are less infectious and less harmful, such as all bacteriophages (that is, viruses that parasitize bacteria).

Nucleic acid is a collective term for the genetic material DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).

5.The essential difference between plants and animals is whether there is a cell wall in the cell, and what has a cell wall is an animal cell, and what is not a plant cell. (including, of course, the ability to photosynthesize).

1.The very much of the title is to make an adverbial, and the very much is to modify like. Table degree should be placed at the end.

5 points, who answered so many questions for you!

Solution: Let the height of the broken place from the ground be x feet.

x^+3^=(10-x)^

Sorted out to 20x=91

So x=Therefore, the height of the break from the ground is a ruler.

ps: means squared.

Solution: A bamboo is one zhang high, and the top of the bamboo falls 3 feet away from the bamboo after being broken, and they form a right-angled triangle.

Let the height of the break point from the ground be x feet.

x²+3²=（10-x）²

x²+9=x²-20x+100

20x=91

x = A: The height of the break from the ground is a ruler.

If the height of the bamboo section is x feet, the other section is (10-x) feet. (1 zhang 10 feet) from the Pythagorean theorem:

x＋3＝（10-x）

Solution: x 91 20

One zhang is 10 3 meters.

One foot is 1 3 meters, and three feet is 1 meter.

10 3-1 = 7 3 meters.

If the fault is x feet above the ground, the oblique part is 10-x

Pythagorean x +3 = (10-x).

Solution: x 91 20

One zhang = 10 feet A square + B square = C square.

Let the height of the broken place from the ground be x feet, and x +3 = (10-x) finishing, so 20x=91, so x = so the height of the broken place from the ground is a ruler.

3m + 2n power = 3m power of 10 + 2n power of 10 = 64 + 25 = 89 to the power of 2m + 3=(x-1) 2+3=x 2-2x+4 to the power of 4 times the power of 8 = 2 7 times 2 6=2 13 n=134 You can compare the size of 2 to the 4th power and the 3rd power of 3, (they are all 100 or 75 divided by 25), you can compare the size of 2 to the 100th power and 3 to the 75th power (the truth is high school).

1 Let the original form =s

2s=1+2 2+3 (2 squared)+. 10 2 to the 9th power.

s=2s-s=1+1 2+1 (2 squared)+.1 2 to the 9th power - 10 2 to the 10th power.

The front is a series of proportional numbers, and with the formula you can find =2 (1-1 2 to the tenth power) and subtract the last term, and finally =2-3 2 to the 8th power = 2-3 64 = 125 64

2 Set 1 2+1 3+·· 1 2010=a1 2+1 3+·· 1 2009=b

Original formula = ax(1+b)-(1+a)xb=a+ab-(b+ab)=a-ba-b=1 2010 (the first 2009 terms are the same).

It should all be equal to 0 - I'm a sophomore.

Set the scheduled time to x

20x+100=23x-20

23x-20x=100+20

3x=120

x=40 task: 20x+100=900

Time, efficiency, and workload.

Original(x)(20)(20x).

Now (x) (23) (23x.)

Is the first x followed by an absolute value symbol.

1) A: y=5*30+(x-5)*5=5x+125B: y=

2) When the two y's are equal, the cost is the same, that is, 5x+125=, so x=20. That is, the cost is the same for 20 boxes.

3) When 15 boxes, the cost of home A is 15 * 5 + 125 = 200 yuan, and the cost of family B is , at this time go to home A.

When there are 30 boxes, the cost of home A is 30 * 5 + 125 = 275 yuan, and the cost of family B is, at this time, go to home B.

1.Store A: 30*5+5*(x-5).

Shop B: 30*5*

2.From (1), 30*5+5*(x-5)=30*5*, the solution, x=20 boxes A: 30*5+5*(15-5)=200 B: 30*5*

So, when you buy 15 boxes, go to store A and buy them.

When 30 boxes, A: 30*5+5*(30-5)=275B: 30*5*

So, when you buy 30 boxes, go to store B and buy them.

If Y dollars should be paid, then.

1) Y A = 150 + 5 (x-5) = 5x + 125 Y B = 135+

2)5x+125=135+

x=203) when x=15, get:

yA=200 yuan, yB=yuan.

So go to A's house and buy it.

When x=30, get:

yA=275 yB=270.

So go to B's house and buy it.

1) A: 5 30 + (X-5) 5 B:

2) 30 5 + (x-5) 5 = 30 5 + solution x = 503) A: 15 30 + (30-15) 5 = 525 B: 15 30

I chose to go to the nail.

1. Store A needs to pay: 125+5x

Shop B pays: 135+

2. 20 boxes.

3. When you buy 15 boxes, it costs less to go to store A, and when you buy 30 boxes, store B costs less.

1...A 150+5 (X-5) B.

2...125+5x=135+ x=20

3...15 is less than 20 to go to A 30 is greater than 20 to go to B.