The largest of the following scales is, and the largest scales are

a: 1：4000

b: :400 1:40000

c: 1：400 0000

d: 1：40 000

Depending on the purpose of the map, the size of the area to be represented, the size of the map sheet, and the details of the content of the map, the scale used for mapping varies from large to small. The numerator in the map scale bar is usually 1, and the larger the denominator, the smaller the scale. Maps that are usually larger than 1/100,000 are called large-scale maps; Maps with a scale between 1/100,000 and 1/1 million, are called medium-scale maps; Maps with a scale of less than one part per million are called small-scale maps.

On the same map, the larger the scale, the smaller the scope of the map, the more detailed the content in the map, and the higher the accuracy. The smaller the scale, the larger the area represented on the map, the more concise the content reflected, and the less accurate it is. Most of the maps in geography textbooks and atlases used by secondary school students are small-scale maps.

The larger the denominator, the smaller the scale.

should be a

Don't believe the upstairs, choose A, the size of the scale is the size of the fraction, I hope you understand, the unit is the same, and then: the number is the dividing sign, the size of the fraction you should be able to compare.

The smaller the denominator. The larger the scale.

So it's a

The larger the ratio a, the greater the actual distance reflected.

You can think of the scale as a fraction, and the larger the denominator, the smaller the scale; Conversely, the smaller the denominator, the larger the scale.

There are three ways to represent it: numerical scale, graphical scale, and text scale.

Formula: Scale scale slap = the ratio of the distance on the graph to the actual distance.

Scale Scale:

1. Enlarge the original scale bar to n times, and the enlarged scale bar is: the original scale bar 1*n.

2. Enlarge the original scale bar n times, then the enlarged scale bar is: original scale bar * (1+n).

3. If the original scale is reduced to one-n, the reduced scale is: one-n-part of the original scale.

Scale Units: The scale bar has no units.

The standard scale systems commonly used in China are: 1.25 million, 1.5 million and 11 million.

In China, the 11-scale topographic map is defined as the national basic scale topographic map. There are: 500000 and 1:

1000000。The scale of the Chinese plug-in map is generally 1:10000, and the scale of the map in the atlas is generally 1:

dIn ordinary maps, the scale is equal to 1:100,000 for the large-scale map, and the scale is 1:100,000 1:

The map between 1 million is a medium-scale map, and the map with a scale less than or equal to 1:1 million is a small-scale map. Only option D meets the requirements of large scale, and the other options do not meet the concept of large scale.

Therefore, choose D.

a．1：80000

b.1 cm on the map represents the field distance of 80 km.

Solution: 1 cm in b represents the actual distance of 80 kilometers.

So the scale is: 1:80,000,00>a=1:

So choose b I don't know if the landlord understands o ( o ha!

【Answer】D [Answer Analysis] Test question analysis: A is converted to a digital scale of 1:1000000, C is 1:10000000, and then according to the denominator, the large is smaller, and the denominator is smaller.

Test Center: This question tests the knowledge of maps.

Comments: This question can also test the judgment of the slope size of the map, the denser the contour line, the larger the slope, the more sparse the contour line, the smaller the slope; Judgment of topographic parts; common legends for maps; calculation of the scale; Comparison of the data size of the scale, for example, the larger the denominator, the smaller the scale, and vice versa, the larger the scale; The relationship between the scale and the scope and content, such as the larger the scale, the smaller the range, the more detailed the content, the smaller the scale, the larger the range, the more brief the content, etc.

Don't believe the upstairs, choose A, the size of the scale is the size of the fraction, I hope you understand, the unit is the same, and then: the number is the dividing sign, the size of the fraction you should be able to compare.

Answer B: This question mainly tests the knowledge of scale. The four scales in descending order are ba, d, c

A test question analysis: the larger the scale, the more detailed the content, the scale is a ratio, the smaller the denominator of the scale, the larger the scale. According to 1600000<2000000<4000000<50000000, the denominator of 1600000 is the smallest, and the scale of option A is the largest, indicating the most detailed content.

Comments: The size of the scale is easy to make mistakes, and students mistakenly believe that the larger the denominator, the larger the scale. To compare the scale size of this question, you first need to change the scale representation of each option into a unified format, such as 1:

a.From a mathematical point of view, the four options can be seen as 1 10000, 1 200000, 1 1000000, 1 120000Rule.

The value of 1 10,000 is the largest, that is, this scale is the largest. The larger the scale, the smaller the range represented.

c Because the larger the denominator, the larger the scale.

So the answer is c

a、1：1600000；b、1：2000000；c、1：5000000；d. Scattered 1: 300,000

Comparing the four options in the stem, we can find that the D scale has the smallest chamber cover and the largest scale, indicating the most detailed content

Therefore, choose D.

Answer] A Answer Analysis] Test Analysis: The scale bar is the distance on the graph compared to the actual distance, because the numerator is unchanged, so the larger the denominator representing the actual distance, the smaller the scale, and the larger the scale of the map, that is, the smaller the actual distance represented, so B is wrong; The smaller the scale of the map, the larger the actual distance it represents, the more brief the content, so c is also wrong; The five millionths are the numerical representation of the scale, so choose A.

Test Points: This question tests the knowledge of scale.