What is a piece of expository text for a Chinese stone arch bridge

An expository text introducing a stone arch bridge (illustrating things).

1. Make an analogy.

It is illustrated through parables. There are many metaphors for stone arch bridges in the text, which are compared to two things: one is a rainbow and the other is a bow.

These two things can not only express the basic characteristics of the stone arch bridge in form, give people a feeling of beauty, but also facilitate the visual explanation of the characteristics of the stone arch bridge in architecture. For example, "the bridge hole of the stone arch bridge is arc-shaped, like a rainbow." "The bridge is not an ordinary semicircle, but like a bow."

2. Give examples.

It is to give typical examples to illustrate. For example, in order to illustrate the characteristics of Chinese stone arch bridges, four typical examples of Traveler's Bridge, Zhaozhou Bridge, Lugou Bridge and Changhong Bridge are cited. Summarize the Traveler's Bridge and Changhong Bridge, which is a longitudinal description, which not only explains the long history of China's stone arch bridge, but also praises the wisdom and wisdom of the ancient working people; It also shows the rapid development of the bridge industry in New China and praises the incomparable superiority of the socialist system.

The article focuses on Zhaozhou Bridge and Lugou Bridge as examples, and specifically illustrates the characteristics of Chinese stone arch bridges, which is a horizontal description, Zhaozhou Bridge is a single-arch stone bridge, and Lugou Bridge is a double-arch stone bridge. The four bridges listed in the article are very representative, some are sketched, some are detailed, and the details are appropriate, and the whole picture of China's stone arch bridges is introduced from two aspects: longitudinal and horizontal. When using examples to illustrate, we must pay attention to the typicality and representativeness of the examples, and we must not use individual facts and accidental phenomena to represent the general and the inevitable.

3. Column numbers.

It's about using accurate numbers. For example, specific numbers are used for the time, length, width, and number of arch rings of the Zhaozhou Bridge. There are approximate numbers, there are exact numbers, and they can receive a good explanation effect, such as showing that the stone arch bridge has a solid structure, and it is used to "be able to span the river for decades, hundreds or even thousands of years".

4. Make comparisons.

It is to illustrate it by comparing it with things of the same kind or related to it. When explaining the solidity of the Lugou Bridge, the article said that "when the Yongding River was flooded, it was very violent, and the embankments on both sides of the river were often washed out in the past, but this bridge never had an accident." This is a comparison of the Lugou Bridge and the embankments on both sides of it.

5. References. Illustrate by quoting famous quotes. There are "general quotations" in the article, such as the various terms used by Chinese poets to compare stone arch bridges at the beginning of the article. "Lying Rainbow" and "Flying Rainbow", etc., such repeated metaphors, not only give people relevant knowledge, but also make people feel as if they are in the mythology, in the poetry and painting, and deepen people's impression of the beautiful form of the stone arch bridge.

There are also "special citations", such as quoting Zhang Jiazhen's praise in the Tang Dynasty, "making peculiar, people don't know why it is", in order to explain the peculiarity of the structure of Zhaozhou Bridge; The quotation of Zhang Ling's praise in the Tang Dynasty "the first moon comes out of the clouds, and the rainbow drinks the stream" is to illustrate the beautiful form of the Zhaozhou Bridge; It also quotes the praise of the Italian Marco Duro, "it is unique in the world" and "together constitute a beautiful wonder", in order to illustrate the characteristics of the Lugou Bridge.

1. Draw an analogy 2, give an example 3, list numbers 4, compare 5, and quote.

For the relevant instructions for the use of stone arch bridges in China, you can consult the relevant personnel.

The explanatory method used in "Chinese Stone Arch Bridge":

1. Illustrate with examples.

These bridges vary in size and form, and many are amazing masterpieces. The most famous of these are the Zhaozhou Bridge in Zhao County, Hebei Province, and the Lugou Bridge near Beijing.

Explanation: Using the method of illustration with examples, it is specifically illustrated that the Zhaozhou Bridge and the Lugou Bridge are famous stone arch bridges in China, which are amazing masterpieces.

2. How to explain the column numbers.

The Zhaozhou Bridge is very majestic, with a total length of meters, a width of meters at both ends, and a slight narrowness in the middle, with a width of 9 meters.

Explanation: The method of illustrating the column numbers is used to specifically and accurately illustrate the very majestic features of the Zhaozhou Bridge.

3. How to make a citation.

The design of the bridge is completely scientific, and the construction technology is ingenious. Zhang Jiazhen of the Tang Dynasty said that it was "peculiar, and people don't know what it does".

Explanation: The use of quotation method and the quotation of Zhang Jiazhen of the Tang Dynasty praised the design of the Zhaozhou Bridge as completely in line with scientific principles, and the construction technology is ingenious. Make the article more convincing.

4. Illustrate the method of analogy.

The bridge hole is not an ordinary semicircle, but resembles a bow, so that the road above the arch has no steep slope, which is convenient for cars to get up and down.

5. Illustrative methods for comparison.

When the Yongding River is flooded, it is very violent, and the embankments on both sides of the river are often washed away in the past, but this bridge rarely has accidents, which shows its solidity.

Explanation: A comparative illustrative method was used to compare the situation before and after the construction of the Lugou Bridge, highlighting the structural sturdiness of the Lugou Bridge.

1. Column number: This is a stone arch bridge with a long history, probably thousands of years old.

2. For example, it is a stone arch bridge with a long history, and the hole of the stone arch bridge is arc-shaped like a rainbow.

3. Example: This is a stone arch bridge with a long history, which is incomparably majestic.

Giving practical examples to illustrate things and making the things to be explained concrete so that the reader can understand them is called an example. To illustrate things or facts by giving examples, we should pay attention to the representativeness of the examples and the appropriateness of the examples.

Illustrate in different ways that this is a characteristic of a historic bridge.