If you are in a hurry, please consult in advance!!

It's a disaster, it's a blessing to enjoy, you can rest assured, ** work is the same, the most important thing is to have a good time, natural disasters, do you understand nature? Naturally, we don't know when and where, who it will be, what things will be, etc., and we should think about the beauty of the world and not always worry about disasters.

It's a great place with a lot of produce, and the environment is also close to the south.

Mengshan is high, Yishui is long, and Yimeng Mountain is a good place. Linyi, Shandong Province, known for its Yimeng Mountainous Area, is located in the southeast of Shandong Province, with jurisdiction over three districts and nine counties, covering an area of 10,000 square kilometers and a population of 10 million, making it the largest and most populous administrative region in Shandong Province.

Linyi City has a variety of landform types, integrating the rough scenery of the north country and the charm of the land of fish and rice in the south. The north is surrounded by rolling hills, the central is rugged hills, and the south is an endless alluvial plain. Mengshan in the north, famous for "natural oxygen bar", "longevity", across hundreds of miles, seventy-two main peaks, thirty-six caves, set danger, mysterious, secluded, open, strange, male, show in one, far away to Mount Tai, majestic and magnificent.

The meandering Yi River, like an inlaid jade belt, runs through the whole territory and is full of aura. The Lintancang Plain in the south is fertile and fragrant. The beautiful "Yimeng Mountain Minor" sings the infinitely beautiful scenery of Linyi.

Main landscape of Linyi:

Mengshan Forest Park, Wang Xizhi's Former Residence, Yinqueshan Han Tomb Bamboo Slip Museum, Menglianggu Tourist Area, Qi Great Wall Ruins, Qilu Strange Stone Park, Reclining Buddha Temple Park, Yinbei Nanzhai Han Portrait Stone Tomb, Cangshan Nature Reserve, Tashan Forest Park.

Linyi has a long history and is the birthplace of Dongyi culture in China and one of the important birthplaces of Chinese civilization. There are more than 300 places of interest and historic sites in the city, and there are more than 140 key cultural relics protection units above the provincial level. The bamboo tube of "The Art of War" and "The Art of War" unearthed from the Han Tomb Group of Yinque Mountain in the urban area is one of the top ten archaeological discoveries in the country after the founding of the People's Republic of China.

Linyi City is also the hometown of historical and cultural celebrities such as Zeng Zi in the Spring and Autumn Period, Meng Tian in the Warring States Period, Liu Hong, the inventor of the Eastern Han Dynasty, Zhuge Liang in the Three Kingdoms Period, Wang Xizhi, the calligrapher of the Eastern Jin Dynasty, Yan Zhenqing, a calligrapher in the Tang Dynasty, and Zuo Guigui, a patriotic general in the Qing Dynasty.

During the War of Resistance Against Japanese Aggression and the War of Liberation, Linyi City was a famous revolutionary base and the capital of the Liberated Area of Shandong. It used to be the headquarters of the Communist Party of China's East China Bureau, Shandong Branch, Shandong Military Region, Shandong Province, the 115th Division of the Eighth Route Army, the Military Headquarters of the New Fourth Army, and the First Branch of the Anti-Japanese Military and Political University.

Linyi City belongs to the middle and low mountains and hilly areas of Shandong, and the low mountains and hills account for 60% of its total area; Taiyi Mountain Range and Mengshan Mountain are the skeleton structure to form the famous Yimeng Mountain Area, the northern peaks and valleys are undulating, the valleys are deep, there are Mengshan Mountain, Yishan Mountain, Wenfeng Mountain and the famous 72 Gu and many other scenic spots; The south is the alluvial plain of Linyi Tan (city) Cang (mountain), which is a pastoral scenery. The natural landscape is very rich, there are strange peaks and mountains, strange caves, lakes and waters, waterfalls and hot springs, beautiful trees and famous flowers, etc.

The tourism resources of Linyi City determine three major tourism themes: the natural scenery tour represented by Mengshan Mountain, the cultural and historical tour represented by Dongyi culture, and the patriotic education tour represented by the commemorative site of the construction of the revolutionary regime.

The denominator is not 0, so x≠ 3

The preliminary simplification has 2x (x+3)+(x+3) (3-x)-2 (x+3)=3

Dedenominator simplification has x 2 + 7x-12 = 0

The solution yields x=(-7 97) 2

Angular bad=90-angular b=40, angular bac=180-50-70=60

Hornstone chongyu qin dae = 40-30 = 10

Angular coarse void annihilation boa = 180-30 --25 = 125

Area: (root number 10 2) square = 5 cm.

Class B average: [81 (49 plus 51)-51 7] (49 plus 51) = (8100-357) 100== points.

(1) The longest right angle of isosceles is the hypotenuse, and if the right angle is x, 2x*x=100 is obtained according to the Pythagorean theorem

Get x = root number 50

The area is s=1 2 * root number 50 * root number 50 = 25 (2), and the average score of class B is x

According to the title. 81 (51 + 49) = 49x + 51 (x-7) to solve x.

(1) Because it is an isosceles right triangle, first set the waist on both sides as x, the square of x = 10, then x = root number 10, then the area of the triangle = root number 10x root number 10x1 2 = 5 square centimeters, then the triangle plate is 5 square centimeters.

2) If the total score of class A is x, then the average score of class B is x 51, the average score of class B is x 51+7, the total score of class B is (x 51+7)x49, and the average score of the two classes is [(x 51+7)x49+x] (51+49)=81, then 100 51x=7757, then x=, then the average score of class B is, then the average score of class B is points.

I was in the same situation at the time, and it was okay.