A social topic, there is a point of urgency, fifty points

It seems to be a high school geography topic, and the specific three questions are respectively:

1. The reason for the emergence of a is that there is a river flowing through this place, forming a plain, the soil is fertile, the irrigation is convenient near the river, and the terrain is low and the temperature is high; and the ground b, which is located in the middle of the mountain, is on high ground, cannot provide the heat necessary for the growth of crops, is rugged and has no irrigation water supply, and is inconvenient for the working people to work;

2. Regularity: development along the river; Reason: The title says that it is a county seat, and the economic development here is mainly based on agriculture, and agricultural development requires flat and vast land, fertile soil, sufficient water, light and heat, which is a typical river-oriented type.

3. Of course, you can't cut down the trees on the mountain, cutting down the trees will lead to soil erosion on the mountain, and more serious will occur landslides and mudslides and other geological disasters, which may lead to the destruction of the entire village. The consequences are serious

I'll go.,It's only one before.,Typing for five minutes is a lot of professional.,It seems that the landlord can choose the answer haha,Congratulations.。

1. The place of residence should be chosen in a place with flat terrain, water and convenient transportation. In the picture, place A, near the river bank, the terrain is flat, there are mountains in the north, which is convenient for planting fruits, and the south is flat, and there is water conservancy, which is convenient for planting rice, and it is naturally convenient to establish settlements on both sides of the river. And B, located in the mountains, left and right are surrounded by high mountains, inconvenient transportation, insufficient water conservancy, far away from the river, insufficient production, and does not have the advantages of settlement.

Therefore, the county seat is chosen to be at A.

2. The county seat should be built by the river. However, due to the proximity of the north bank of the river to the mountains, it is not conducive to greater development, so it should be mainly to the south. in the northern mountainous areas, to plant fruit trees and develop the mountain economy; In the south, water conservancy should be developed, and the flat terrain should be used to focus on the cultivation of rice, taking into account river transportation, and the transportation industry should be developed.

In this way, there can be grain, trees, transportation, and balanced development.

3. The mountainous areas should be mainly planted in numbers, and the development should be carried out due to the characteristics of the mountains, and rice cannot be blindly developed: the need for water conservancy for rice is difficult in mountainous areas, so it is not advisable to cut down trees and plant rice! We should take advantage of the situation and make use of natural conditions to develop suitable cash crops, rather than blindly developing.

Answer: 1) It should be better to have a water source at place A. The two rivers converge and are close to the upper reaches of the river, so they will not be easily flooded by rising water. If it is too close to the upstream and has less water resources, it is also not suitable.

2) The law of expansion is mainly built on water. Even in terms of diversion, it is built on a tributary with a lot of diversion.

3) No, after destroying the resources and environment, it may cause serious consequences of debris flow.

Answer: 1. A is the confluence of the two rivers, its land is fertile, the water source is sufficient, it is a good place for primitive farming. For the convenience of getting water and farming, people lived nearby, and gradually the population increased and naturally became a county town.

Although it is located between two mountains, the mountainous land is barren and it is difficult to get water, so it is impossible to live in this place in the old days when they lived on the natural environment.

2. The main law of the expansion of the county in the figure is the development along the river, because the land on both sides of the river is not only fertile, but also convenient transportation, and it is of great help in solving the problem of residential drinking water. Of course, in the current era of developed water conservancy, it is not excluded that there are places far away from the river to develop county seats, but in short, they are limited by water;

3. Pay attention to the balance of nature at all times, excessive felling of trees will lead to soil erosion and dry up rivers. Therefore, cutting down trees and planting rice only sees the immediate benefits and does not have a long-term thinking, but it can appropriately increase arable land under the premise of ensuring ecological balance.

It is recommended that you explain the signs in the diagram, what the boxes represent, what the boxes with slashes represent, etc.

It's best to find a tutorial, it's not that hard, and you didn't write the last sentence right.

Give me the data, and the questions, and I can help you get them, just give points.

The first floor is pure, this notebook** is at 4100, if it can be cheaper, you can choose not to have accessories or not to bags or something!

There are two models in the i3 series, one is 14-inch and one is 15-inch.

Acer4741G's cost performance is super high,I used4741G i3 350,The performance is slightly better than yours,**It's 3999,The one you chose**It seems to be 3900,It's a little cheaper,But the i3 350 graphics card is 1G,Yours is 512,This**is half a month ago,I heard**It's set by the manufacturer,It is estimated that other regions**The same,I bought it in Zhongguancun,There should be no fake。

The three of them spent a total of 8 yuan, and each copyist should have spent 3 8 yuan;

A spends 15 3-8 3 = 7 3 for C

B spends 9 3-8 3 = 1 3;

If the total number is 8 3, then the proportion of money spent by A for C should be (7 3) (8 3) = 7 8;

The proportion of money spent by B for C should be (1 3) (8 3) = 1 8;

So 800,000 * (7 8) = 700,000; 80*(1 8)=100,000;

The correct answer is: 700,000 for A and 100,000 for B is the fairest.

Damn, it's that simple, old question. 8 yuan, three people, 8 3 yuan per person, 800,000 yuan paid by strangers, 100,000 yuan for every 1 3 yuan, ate A 7 3 fast, ate B 1 3 yuan, so, A 700,000 yuan, B 100,000 yuan.

This question is a training question for the math competition that I forgot about the first or second year of junior high school.

A (8 3) * (80 8) * 5

B (8 3) * (80 8) * 3

Probably, not sure.

5 pieces of A, 3 pieces of B.

The rest is divided equally.

Give A 500,000 and B 300,000.

1. Oral arithmetic of the following questions. (23 points) 10 528 349 6 24 0 7 5 400 125 8 80 3 = 6 6= 2 (= 10 2= ( 12= 1 2. Write the laws or properties used in simple calculations for each of the following questions (12 points) 4 + 25 (8 7 (2 72 16 (3) Calculate in a simple way. (65 points) 1125 997 998+1246+9989 (8700 870 87) 87 125 (2 78 36 17 8 43 25 100 (2 1 ) 1) (2) (3)2004 2003*2005 (4)276*543-267 276+543*275 (5)17 51+ (68 1+51 2)*17 (6) (4 1) 52 and 11/25 79 and 11/20 = = = = 159 ( =159 100 =15900 3)2002+2001-2000-1999+1998+1997-1996-1995+......2 + 1 4) (1 2 2) + (2 3 1) + (3 4 ) + ...10 11 out of 1) 5) 1 3 + 1 1 fifteen + 1 35 + 63 + 1 99 6) 1 and a half - 5 6/6 + 7 12 - 9 out of 20 + 11 3/30 - 13/42 + 15/56 (hint, 1 1 2 = 1 + 1 2, +1 2 + 1 3 = 5 6 .......))

Thank you for the trouble to adopt!

==If you're remote?

FaceTime can come with it. However, both sides must be iphone4 or above.

In addition, the iPhone version of QQ is also available. Last weekend pro-test - -

Plug it in directly and choose a webcam,Choose in the phone,It looks like it's going to be turned off or something.,I forgot It seems to take the data cable link and install it.,Some phones don't need to be installed.。 You can do it yourself.

The review will not be written, you are invincible.

Damn, you don't know how to write yourself and you have to be helped! Why don't you want to go online! Deserve!