Go on an outing on the weekend, initially set to come in Huailai, is it reliable?

What does it say, Huailai is a completely good place.

Huailai County is located in the west of Beijing, bordering Yanqing, Changping and Mentougou counties (districts) in the southeast, Xiahuayuan of Zhangjiakou City in the northwest, Chicheng County in the north, and Zhuolu County in the southwest. Huailai County is a famous fruit town, with an area of 500,000 acres of fruit forests in the county, which can provide 150,000 tons of dried and fresh fruits annually. It is blessed with unique tourism resources.

The first large-scale reservoir built after the founding of the People's Republic of China, the Guanting Reservoir, has a wide lake, beautiful mountains and green waters, rippling blue waves, and fish and light boating, and is known as the "Pearl of the Outside the Plug". Woniu Mountain Tourist Area, Hanhai Ranch (Taishizhuang Resort), Tianmo Park, Yongding River Canyon Rafting, Tianhuang Mountain Northern Wei Grottoes Tribal Group Tourist Area, Bailongtan Natural Scenic Area, Huanglong Villa and Rongchen Vineyard and other tourist attractions around the lake are the icing on the cake on the shore of Guanting Lake, and are ideal leisure, vacation and summer resorts outside the Saiwai.

Of course, this is possible, if you have a car, you can travel independently, and it will be less than an hour from the city.

That's right, and Huailai has a long history, and the opening war of the three ancestors of China opened the prelude to the colorful movement of this hot land. The tragedy of Youyan, the prosperity of the ancient county of Qin, the conquest of Taizong of the Tang Dynasty, the tearing and killing of the Song and Yuan dynasties, the humiliation of the Ming Dynasty and the civil engineering changes, and the mutual penetration and integration of various ethnic groups in the Qing Dynasty have all left an indelible historical imprint on this land, attracting countless people to explore and admire. In particular, the national key protection cultural relics unit, the most well-preserved, the most complete ancient function of the large-scale ancient post station - Jiming Station, the ancient city of the new security, the hometown of the national famous combat hero Dong Cunrui - Nanshanbao Village and Dong Cunrui Martyrs Memorial Hall are the first history and humanities and patriotic education, carry forward the national spirit of the ideal place.

Mom, don't worry, this time it's organized by the school, I pay more attention, there will be no accidents. What a good opportunity to exercise myself this time, you always say that my self-care ability is poor, but you are like this, how can my self-care ability be improved?

What a rare opportunity this is, how we are always in a cage, how we yearn for nature! Mom, just promise me!

In this sense, you can refer to it).

1 point: 1 + 1 = 2 people 2 points: 2 + 2 = 4 people. 128 people can be notified, which is definitely enough!

7 15 in 6 7 is a downhill road equal to 6 7 7 15 = 42 105 = 2 5

So many possibilities.

10 cola + 0 milk tea.

7 cola + 2 milk tea.

4 cola + 4 milk tea.

1 cola + 6 milk tea.

(1) Coke and milk tea.

2) x+(20-2x)/3≥8

3x+20-2x≥24

x≥4...Cola milk tea.

2) At least one drink per person, the relationship formula is: the number of Coke cups + the number of milk tea cups 8, and the relationship formula of at least two cups of milk tea is: the number of milk tea cups 2, combined with (1) to solve Answer: Solution:

1) Set up Coke and milk tea to be x and y cups respectively, and get 2x+3y=20 (and x, y are natural numbers) x= 0 according to the question

The solution is y y=0,1,2,3,4,5,6

Substituting 2x+3y=20 and testing, so there are four ways to buy, and the number of cups of cola and milk tea in each way is 10,0 respectively;

2) According to the title: at least one drink per person and at least two cups of milk tea, that is, y 2 and x+y 8

From (1), it can be seen that there are two ways to buy: 7,2; ②4，4．

Solution: (1) Suppose to buy cola and milk tea are x and y cups respectively, and according to the question, 2x+3y=20 (and x, y are natural numbers) 2x=20-3y, x=10-3 2y

x=10,y=0， x=7,y=2， x=4,y=4， x=1,y=6

So there are four ways to buy, each way Coke and milk tea have a cup of 10,0 respectively;

2) According to the title: at least one drink per person and at least two cups of milk tea, that is, y 2 and x+y 8

From (1), it can be seen that there are two ways to buy: 7,2; ②4，4．

Solution: (1) If you buy Coke and milk tea are x and y cups respectively, you can get 2x 3y 20 according to the title (and x and y are natural numbers).

x 0 solution y

y 0,1,2,3,4,5,6 substituting 2x 3y 20 So there are four ways to buy, each way has 10,0 cups of coke and milk tea;7，2；4，4；1,2) According to the title: at least one drink per person and at least two cups of milk tea, that is, y 2 and x y 8

From (1), it can be seen that there are two ways to buy.

1.Four. First: Seven cups of Coke and two cups of milk tea. Second: four cups of Coke and four cups of milk tea. Third: one cup of Coke and six cups of milk tea. Fourth: zero cups of milk tea, ten cups of cola.

2.At least two cups of milk tea, how can there be at least one cup of drink, there should be at least two cups of drinks (milk tea belongs to the beverage category).

Coke is 2 yuan, milk tea is 3 yuan, 20 yuan.

So it should be 20-2x=(a multiple of 3), and a multiple of 3 must be a multiple of 2, which is an even number.

That is, 3*x<20 (x is an even number) The result is 0 2 4 6, that is, there are 4 ways: milk tea 0 is cola 10, milk tea 2 is cola 7, milk tea 4 is cola 4, milk tea 6 is cola 1

When there are at least 2 cups of milk tea, and 1 cup per person, that is, the number of milk tea plus the number of cokes is greater than 8, there are 2 ways, the middle two.

Here, the score line is not easy to copy,

I've made up my mind! or on the condition of good test results.

Or (oh not encouraged) tell a little lie, poor boy.