Use a sentence about 80 words about the place that you don't need to say or say

Not to mention burden reduction, not to mention quality education. Just looking at our homework, I know that our generation is also a failed work

Make a sentence with "don't say... Don't say... Just..."

It is not necessary to say the green hills, vigorous pines and cypresses, floating white clouds and blue sky. It is not necessary to say that nightingales are singing, sparrows are playing and beautiful butterflies are dancing in the wind

(ratio) 1 / 8: 0.25

1 / 8: 0.25
=1/8 :0.25
=1/8 :1/4
=(1 / 8) * 8: (1 / 4) * 8 according to the theorem, if both sides are multiplied by the same number, the proportion value will not change
=1 :2

If {an} is an arithmetic sequence, the first term A1 > 0, A2010 + a2011 > 0, a2010a20110, the maximum integer and the positive integer n are equal

a2010a2011＜0
That is, (a1 + 2009d) (a1 + 2010d) < 0
If d > 0, then (a1 + 2009d) (a1 + 2010d) > 0, not satisfied
That is, A2010 > a2011
∴a2010＞0,a2011＜0
a1+a4020=a2+a4019=a3+a4018=…… =a2010+a2011＞0
∴S4020=2010·(a1+a4020)＞0
a1+4021=a2+4020=a3+a4019=…… =a2010+a2012=2·a2011＜0
S4021=4021·a2011＜0
When Sn > 0, the maximum value of n is 4020
When n = 2010, Sn reaches the maximum
Which one are you asking? I don't understand

Yaming family moved to a new house on New Year's day. Mother wants to lay the floor tiles on the living room of the new house. It is known that the living room is 12 meters long and 4 meters wide, and the floor should be paved with 80 cm square bricks. Please calculate
How many bricks do you need?

12 × 4 = 48 square meters
48 square meters = 480000 square centimeters
80 × 80 = 6400 square centimeter
480000 △ 6400 = 75 pieces
I don't know if it's right. I think it's right. Let's adopt it!

What are the 56 ethnic groups in China? What are the cultural characteristics of each ethnic group? Where are they distributed?

The great family of China -- 56 nationalities
1. Achang Nationality: it is distributed in Yunnan, with a population of over 27000. It is mainly engaged in agriculture and has developed handicraft industry. It is especially famous for making long knives. It has its own language, tea picking
2. Bai Nationality: distributed in Yunnan, nobility, Sichuan and other places, with a population of more than 1.59 million. They have their own language about agriculture
3. Bao'an Nationality: it is distributed in Yunnan, Qinghai and other places, with a population of more than 12000. It is mainly engaged in agriculture and handicraft industry. It is mainly engaged in Sabre making. Bao'an Dao is very famous and has its own language
4. Bulang Nationality: distributed in Yunnan, with a population of more than 82000, mainly engaged in agriculture, has its own language
5. Buyi Nationality: it is distributed in the aristocracy, Yunnan and other places, with a population of more than 2.54 million. It is mainly engaged in agriculture and enjoys the title of "rice nationality". It has its own language and writing: slate house, embroidery and carved mask
6. Korean Nationality: mainly distributed in Heilongjiang, Jilin and Liaoning, with a population of more than 1.92 million, mainly engaged in agriculture. It is famous for its good rice planting and has its own language
7. Dau Nationality: distributed in Inner Mongolia, Heilongjiang, Xinjiang and other places, with a population of more than 120000, mainly engaged in agriculture and animal husbandry, and has its own language
8. Dai Nationality: distributed in Yunnan, with a population of more than 1.02 million, mainly engaged in agriculture. Temples, pagodas, bamboo buildings and bamboo bridges show unique architectural art and have their own language
9. De'ang Nationality: it is distributed in Yunnan, with a population of more than 15000. It is mainly engaged in agriculture. It is famous for its tea planting and has its own language
10. Dong Nationality: it is mainly distributed in Guizhou, Hunan, Wenzi and other places, with a population of more than 2.51 million. It is mainly engaged in agriculture and forestry. Drum Tower, Fengyu bridge and Fengyu pavilion are the main signs of Dong Township, with their own language and characters
11. Dongxiang Nationality: mainly distributed in Gansu, Ningxia, Xinjiang and other places, with a population of more than 370000, mainly engaged in agriculture, good at planting melons and fruits, and has its own language
12. Dulong Nationality: it is distributed in Yunnan, with a population of more than 5000 people. They maintain a good social fashion of "never leaving anything on the road, never closing the door at night". There are few cases of theft. They have their own language
13. Oroqen: distributed in Inner Mongolia, Heilongjiang and other places, with a population of more than 6000, mainly engaged in hunting and agriculture. It has its own language - fur clothing, bonfire Festival
14. Russian Nationality: it is distributed in Inner Mongolia, Heilongjiang and other places, with a population of more than 13000. It is engaged in various repair, transportation and handicraft industries, and has its own language and writing
15. Ewenki: distributed in Inner Mongolia and Heilongjiang, with a population of 26000, mainly engaged in animal husbandry, with its own language
16. Gaoshan Nationality: mainly distributed in Taiwan Province, the rest of them live in Fujian and other southeast coastal areas, with a population of about 40 people. They are mainly engaged in agriculture, fishing and hunting, and have their own language
17. Gelao Nationality: distributed in Guizhou, Guangxi, Yunnan and other places, with a population of about 430000, mainly engaged in agriculture, has its own language
18. Hani: distributed in Yunnan, population 1.25 million, mainly engaged in agriculture, good at terracing, has its own language and writing
19. Kazak Nationality: it is distributed in Xinjiang, with a population of more than 10000. It is mainly engaged in animal husbandry and good at embroidery. Its embroidery products have been exported to more than ten countries and regions, such as Japan, and it has its own language and writing
20. Han Nationality: it is distributed all over the country, with a population of more than 1.04 billion. It is economically and culturally advanced, and has its own language and writing
21. Hezhe Nationality: distributed in Heilongjiang Province, with a population of more than 4000, is a fishing nation in northern China, with its own language
22. Hui people: they mainly live in Ningxia, Gansu, Xinjiang and other places, and the rest live scattered all over the country, with a population of more than 8.6 million
23. Jinuo Nationality: it is distributed in Yunnan Province with a population of over 18000. It is mainly engaged in agriculture. It is good at growing tea and has its own language
24. Jing Nationality: it is distributed in Guangxi, with a population of over 18000. It is mainly engaged in coastal fishing, agriculture and salt industry, and has its own language
25. Jingpo nationality: it is distributed in Yunnan Province, with a population of more than 110000. It is mainly engaged in agriculture, planting rice, corn, dry grain and other crops. It has its own language and writing
Kirgiz: distributed in Xinjiang and Heilongjiang, with a population of more than 140000, mainly engaged in animal husbandry and agriculture, with its own language and writing
27. Lahu Nationality: it is distributed in Yunnan Province, with a population of more than 410000
28. Li Nationality: it is distributed in Hainan Province, with a population of over 1.11 million. It is mainly agricultural, and its women are skilled in textile. "Lijin" and "Lidan" are famous all over the world. They have their own language and writing
29: Susu Nationality: it is distributed in Yunnan, Sichuan and other places, with a population of more than 570000. It is mainly engaged in agriculture and has its own language and writing
30. Luoba Nationality: distributed in Tibet, with a population of more than 2000, mainly from agriculture and hunting, has its own language
31. Manchu: mainly distributed in Heilongjiang, Jilin and Liaoning, with a population of about 9.82 million, mainly engaged in agriculture, and also engaged in fishery and animal husbandry. They have their own language and writing
32. Maonan Nationality: it is distributed in Guangxi, with a population of more than 71000. It is mainly engaged in agriculture. It is good at raising beef cattle and weaving bamboo hats. It has its own language
Menba Nationality: distributed in Tibet, with a population of more than 7000, mainly engaged in agriculture. They are good at weaving bamboo and rattan utensils and making wooden bowls. They have their own language
Mongolian: it is distributed in Inner Mongolia, Xinjiang and other places, with a population of more than 4.8 million. It is mainly engaged in animal husbandry and agriculture, and has its own language
Miao Nationality: it is distributed in Guizhou, Hunan, Hubei and other places, with a population of more than 739. It is mainly engaged in agriculture, and enjoys a high reputation for embroidery, peach blossom weaving, brocade batik and silver ornaments. It has its own language and writing
36. Mulao Nationality: distributed in Guangxi, with a population of more than 150000, mainly engaged in agriculture, planting rice and corn, with its own language
37. Naxi Nationality: it is distributed in Yunnan, Sichuan and Tibet, with a population of more than 270000. It is mainly engaged in mountain agriculture and animal husbandry, and has its own language and writing
Nu Nationality: it is distributed in Yunnan Province with a population of over 27000. It is mainly engaged in mountain agriculture and has its own language
39. Pumi Nationality: it is distributed in Yunnan and Sichuan, with a population of more than 29000. It is mainly engaged in agriculture and animal husbandry, and has its own language
Qiang Nationality: it is distributed in Sichuan and other places with a population of more than 190000. It is mainly engaged in agriculture. Big white kidney bean is a famous specialty with its own language
Salars: they live in Qinghai, Gansu and other places, with a population of over 87000. They are mainly engaged in agriculture, have developed arts and have their own language
42. She Nationality: it is distributed in Fujian, Zhejiang and other places, with a population of more than 630000. It is mainly engaged in agriculture. Besides growing rice, it also grows tea, sugar cane and other economic crops. It has its own language
Shui nationality, distributed in Guizhou, Guangxi and other places, with a population of more than 340000, is mainly engaged in agriculture, good at growing rice and glutinous rice, and has its own language
44. Tajik Nationality: it is distributed in Xinjiang, with a population of more than 33000. It is mainly engaged in animal husbandry and agriculture, and has its own language
45. Tatar Nationality: it is distributed in Xinjiang, with a population of more than 4000. It is mainly engaged in business, handicraft and animal husbandry. It has its own language and characters
46. Tu Nationality: it is distributed in Qinghai, Gansu and other places, with a population of more than 190000. It is mainly engaged in agriculture and animal husbandry. It has its own language and writing
47. Tujia Nationality: it is distributed in Hunan, Hubei and other places, with a population of more than 5.7 million. Tujia Cotton weaving is famous for its "colorful and exquisite workmanship" and has its own language
48. Wa Nationality: it is distributed in Yunnan, with a population of more than 350000. It is engaged in agriculture. Wood drum dance is full of national characteristics. It has won many awards in national folk dance and has its own language and writing
49. Uygur: it is mainly distributed in Xinjiang, with a population of more than 7.21 million. It is mainly engaged in agriculture, good at planting grain, cotton, melons and fruits, and has its own language
Uzbek Nationality: it is distributed in Xinjiang, with a population of about 14000. It is mainly engaged in animal husbandry and has its own language and characters
Xibo Nationality: mainly distributed in Liaoning, Jilin, Heilongjiang, Xinjiang and other places, with a population of about 170000, mainly engaged in fishing, hunting and agriculture, with its own language and writing
Yao Nationality: distributed in Guangxi, Hunan, Yunnan, Guangdong and other places, with a population of more than 170000, mainly engaged in mountain agriculture, has its own language
53. Yi people: they live in Yunnan, Sichuan and other places, with a population of more than 6.57 million. They like to eat "Tuotuo meat" and drink "Gangan wine". Their dance music is unique, and they have their own language and writing
54. Yugur Nationality: it is distributed in Gansu Province with a population of about 12000. It is mainly engaged in animal husbandry. It advocates horse riding and archery and has its own language
Tibetans: they are distributed in Tibet, Sichuan, Qinghai, Gansu and other places, with a population of more than 4.59 million. They are mainly engaged in animal husbandry and agriculture, and have their own language and writing
56. Zhuang Nationality: it is distributed in Guangxi, Yunnan and other places, with a population of more than 15.55 million. It is the most populous ethnic minority in China. "Zhuang brocade" is famous at home and abroad, and has its own language and writing

Use a sentence about 80 words about the place that you don't need to say or say