1. Central Street: All buildings are protected by European customs. You can choose to take pictures from 7 am to 9 am. After this time, there will be more people.
2. Hagia Sophia: There is no need to visit, but the building is still beautiful, especially when the sun is shining and there are countless pigeons playing on it.
3. Songhua River and Flood Control Memorial Tower: The buildings and railings along the river are very emotional. It is best to take pictures at sunset in summer. There are not many people and the atmosphere is particularly good.
The above three items are all in Daoli District. When you get to the church, you can go to * * Street, and you can go directly to the river along the central street.
4. Nikolai Gogol Street: Different from the historic Central Street, this street was later renovated, but the buildings on the street are also very distinctive, with trams and a famous church.
Eat:
1. Lin Qiu food, including red sausage "Lidos", air-dried sausage, Italian bar and Xiugulin (a snack similar to puffs).
2. martel cuisine, including homemade popsicle bread (there are several options), you can go to the Huamei Restaurant opposite martel to taste Russian western food, which is not expensive, among which canned shrimp is my personal favorite.
3. Specialty: Auricularia auricula, hazel mushroom, salmon and fish roe. ...
Now there are Long Ta, polar museum, Sun Island, and there should be snow sculpture. The ticket price of Harbin Ice and Snow World this year is 160 yuan each. Students can take bus No.88 8 1 at a 50% discount, or take a taxi. You'd better find a regular car to watch.
Chinese detailed description fragment, urgent Baidu
Alipay transfer problem (urgent! ) solution
1 will be transferred to CCB card first, and then put in ICBC card.
This is more troublesome.
2 The bank that changed authentication in Alipay is in my Alipay.
Look for it yourself, change CCB's card to ICBC's, and wait for certification.
Then withdraw the money to the ICBC card.
Estimated need 1~2 days.
What does it mean to forget the meal in a hurry? Rice is one of the raw materials for wine making. If you forget rice, you can't make wine.
It is a metaphor to abandon the fundamental and main parts of things and pursue the secondary and secondary parts. Metaphor does not grasp the fundamental link, but only works hard on side issues. Describe the inversion of light and heavy.
Xixi National Wetland Park Paper! ! ! Urgent! ! ! On the Environmental Protection of Xixi Wetland
Hangzhou, Zhejiang Province is called "paradise on earth" by the world. Su Dongpo, a great poet, once said, "There is heaven on earth and Suzhou and Hangzhou on earth", which embodies the beauty of Hangzhou as a paradise. Hangzhou has many scenic spots since ancient times, such as West Lake, Lingyin Temple and Feilai Peak. In 2004, Hangzhou added another scenic spot: Xixi Wetland.
Brief introduction of Xixi wetland
Xixi National Wetland Park is located in the west of Hangzhou, less than 5 kilometers away from the West Lake. It is a rare secondary wetland in this city. Here is rich in ecological resources, simple natural landscape and profound cultural accumulation. It was once known as the "Three Wests" of Hangzhou together with West Lake and Xiling. It is the first and only national wetland park in China that integrates urban wetland, agricultural wetland and cultural wetland.
Xixi's victory lies only in water. Water is the soul of Xixi, and about 70% of the park area is rivers, ponds, lakes, swamps and other waters. As the saying goes, "One stream bends, one smoke bends". Six rivers crisscross the park, with countless tributaries and fish ponds in the middle, forming a unique wetland landscape of Xixi.
The importance of Xixi lies in ecology. In order to strengthen ecological protection, three ecological protection areas and ecological restoration areas have been set up in the wetland: Feijiadong, Xialongtan and Chaotian Shepherd. There is a wetland science exhibition hall at the entrance, and there are three bioremediation pools and a wetland ecological viewing area in the park. Xixi is also a paradise for birds. There are many bird-watching pavilions in the park, which provide visitors with magnificent scenery of birds flying happily.
Xixi culture has a long history. Xixi has been an isolated place since ancient times and is regarded as a pure land on earth and a paradise by scholars. Qiu Xue 'an, Bo 'an, Meizhu Villa and Xixi Caotang are other businesses created by many literati in history, and they left a lot of poems in Xixi. The ancient stage under the century-old camphor tree at Shentankou is said to be the premiere place of artists from the North School of Yue Opera.
Xixi folk customs, simple. The annual Dragon Boat Festival in Shentankou has a long history and a unique form, and is called "dragon boat with patterns". "Xixi Renjia" and "Sang" near Yanshui Fishing Village? Silk quilt? "Silk Story" reproduces the farm life and labor scene of Xixi aborigines, so that more people can understand and know the typical folk customs of water towns.
Definition of wetland
Because there is no obvious boundary between wetland and water and land, and different disciplines have different research focuses on wetland, there have been differences on the definition of wetland.
The International Convention on Wetlands adopts a broad definition of wetland, that is, whether it is natural or man-made, permanent or temporary swamp, wetland, peatlands or waters, static or flowing, or fresh water, brackish water or salt water, including water with a water depth of less than six meters at low tide. This definition includes the narrow wetland area, which is conducive to the integration of narrow wetlands with nearby waters and land, and is convenient for protection and management.
Wetland research activities usually adopt a narrow definition. In 1979, the American Fish and Wildlife Conservation Agency redefined wetland as: "At the intersection of land and water, the water level is close to or on the surface, or there is shallow water, and it has at least one or more of the following characteristics: (1) There are at least periodic aquatic plant species; (2) The subsoil is mainly wet soil; (3) In the annual growing season, the bottom layer is sometimes submerged by water. " The definition also means that lakes and wetlands are bounded by a depth of 2 meters at low water level. According to this definition, the world wetlands can be divided into more than 20 types, which have been accepted by wetland researchers in many countries.
Hydrological conditions of wetlands are the decisive factors of wetland properties. Sources of water (such as precipitation, groundwater, tides, rivers, lakes, etc. ), water depth, flow pattern, duration and frequency of floods determine the diversity of wetlands. Water has a profound influence on the development of wetland soil. Wetland soil is usually called wet soil or water-bearing soil.
Function of wetland
Wetlands have many functions. They can be used as direct water source or supplementary groundwater, effectively control floods and prevent soil desertification, and can also retain sediments, toxic substances and nutrients, thus improving environmental pollution. It can store carbon in the form of organic matter, reduce the greenhouse effect, protect the coast from wind and waves, and provide clean and convenient transportation ... It is called "kidney of the earth" because of its rich and beneficial functions. Wetland is also a paradise for many plants, animals, especially waterfowl. At the same time, providing food (aquatic products, livestock products, grains), energy (hydropower, peat, firewood), raw materials (reeds, wood, medicinal plants) and tourist sites for human beings is an important foundation for human survival and sustainable development.
Material production function
Wetland has powerful material production function and abundant animal and plant resources. Qilihai swamp wetland is an important bait base and source of primary productivity in Tianjin coastal areas. According to the preliminary investigation, before 1970s, there were more than 65,438+000 species of aquatic and hygrophytic plants in Qilihai, including about 40 species with ecological value. There are about 10 species of mammals and more than 30 species of fish and crabs. Reed, as the most typical plant in Qilihai wetland, covers an area of 7 186 hectares and has high economic and ecological value. It is not only an important raw material for paper industry, but also an important means of production for agriculture, salt industry, fishery, aquaculture and textile industry. It can also play a role in preventing wind and flood, improving the environment, improving soil, purifying water quality, preventing pollution and adjusting ecological balance. In addition, Qilihai can use the water surface 10000 mu, with an annual output of 2000 tons of river crabs, which is a famous river crab producing area in Qilihai.
The rich plant community in wetland provides the function of regulating atmospheric composition. Plants can absorb a lot of carbon dioxide gas and release oxygen. Some plants in wetlands also have the function of absorbing harmful gases in the air, which can effectively regulate the atmospheric composition. But at the same time, it must be noted that wetland habitats will also emit greenhouse gases such as methane and ammonia. Marsh has great biological production efficiency. In the process of organic matter formation, plants constantly absorb CO2 and other gases, especially some harmful gases. Oxygen in the swamp is rarely consumed in the decomposition of dead plant residues. Swamp can also absorb dust and various bacteria in the air, thus purifying the air. In addition, swamp sediments have great adsorption capacity, and sewage or industrial wastewater containing heavy metals can also be adsorbed by swamps.
Water regulation function is one of the main functions of wetlands, which makes wetlands play an important role in water storage, regulating river runoff, groundwater recharge and regional water balance. It is a natural "sponge" for water storage and flood control, which can distribute uneven precipitation in time and space, and avoid floods and droughts through the regulation of wetlands. Qilihai Wetland is an important flood storage and detention area in Tianjin coastal plain, with a safe flood storage depth of 3.5-4m.
Marsh wetland has the function of moistening climate and purifying environment, and is an important part of ecosystem. Most of them are developed in negative landform types, with long-term water accumulation, dense plant growth, intertwined roots and accumulation of residues. Submerged swamps generally have tens of centimeters of grass roots. The grass-root layer is porous and has strong water-holding capacity, which can keep 3 ~ 15 times of its absolute dry weight. It can not only store a large amount of water, but also continuously send water back to the atmosphere through plant transpiration and water evaporation, thus increasing air humidity, regulating precipitation and playing a good role in the natural circulation of water. According to experimental research, one hectare of swamp can evaporate 74 15 tons of water in the growing season, which shows its great role in regulating climate.
Swamp wetlands also have purification functions. They are like natural filters, which help to slow down the water flow. When running water containing poisons and impurities (pesticides, domestic sewage and industrial discharge) passes through the wetland, the slow speed is beneficial to the precipitation and removal of poisons and impurities. Some wetland plants can effectively absorb toxic substances in water and purify water quality.
Swamp wetland can decompose and purify environmental objects and play the functions of "detoxification" and "detoxification", so it is called "kidney of the earth". If there is no wetland, it is like a person's kidney being cut off. For example, nitrogen, phosphorus, potassium and some other organic substances are biologically stored through complex physical and chemical changes, or they leave the wetland permanently and participate in a wider cycle through biological transfer (such as harvesting plants and fishing). There are a considerable number of aquatic plants in swamp wetlands, including floating, buoyant and submerged plants, which have strong detoxification ability and are the bane of poisons. According to the determination, the concentration of heavy metals in wetland plant tissues is 6.5438+10,000 times higher than that in the surrounding water. Because of this, people often use this ecological function of wetland plants to purify viruses in pollutants and effectively remove "toxins" in sewage to achieve the purpose of purifying water quality. Water hyacinth, cattail and reed are widely used in sewage treatment, absorbing high concentrations of heavy metals such as cadmium, copper and zinc in sewage. In Florida, USA, someone did the following experiment. Let the wastewater flow through a cypress swamp (a kind of wetland) before it is discharged into the river. After determination, it is found that about 98% of nitrogen and 97% of phosphorus have been purified and eliminated, which shows the amazing removal ability of wetlands to pollutants. In Karkuta, India, there is a sewage treatment plant in the city. All domestic sewage is discharged into the constructed wetland in the eastern suburbs, and its sewage treatment cost is quite low, which has become a world model.
Another most important function of swamp is to provide habitat for animals. The complex and diverse plant communities in wetlands provide a good habitat for wild animals, especially some rare or endangered wild animals, and are places for birds and amphibians to breed, inhabit, migrate and overwinter. However, although the special natural environment of swamp wetland is conducive to the growth of some plants, it is not an ideal home for mammalian population, but birds can enjoy it here. Because the swamp environment is overgrown with aquatic plants, it provides a rich food source for various birds and a good condition for nesting and avoiding enemies. There are about 200 species of birds that inhabit and haunt wetlands all the year round, such as swans, storks, pelicans, geese, egrets, goshawks, floating gulls, gulls, terns, reed warblers and predatory birds. In addition, the wetland is a stopover for birds from Siberia and northeast China to migrate southward for the winter.
The function of regulating local microclimate is also the essential function of wetland. Wetland water turns into steam through evaporation, and then falls to surrounding areas in the form of precipitation, maintaining local humidity and rainfall.
Historical wetland environmental protection architectural sites are the current protection mode.
Xixi wetland, which has a history of thousands of years, is in danger of disappearing. Xixi Wetland, located in the west of Hangzhou, is a rare urban wetland in China. The natural terrain is a low-lying water network plain, which consists of fish ponds, river ports, lakes, narrow pond foundations and large blocks. It is a second-class wetland with an existing area of 10.08 square kilometers. Wetlands blend with mountains and rivers, and 70% of the area is water, so that villages and fields have to cross by boat.
Xixi, once known as the "Three Wests" of Hangzhou together with West Lake and Xiling, has formed a beautiful landscape picture in the history of Hangzhou with its unique scenery of Jiangnan water town, leaving a rich cultural accumulation. Xixi Wetland was discovered in the Eastern Jin Dynasty, developed in the Tang and Song Dynasties, flourished in the Ming and Qing Dynasties, and declined in the Republic of China, resulting in gradual siltation and even near annihilation.
Xixi in history has a vast territory and a sparsely populated area of 60 square kilometers. In the past 20 years, the city has rapidly advanced to wetlands, and local residents have raised fish around water, built fields and set up factories to build houses. With the evolution of urbanization, a large number of water areas in wetlands disappear rapidly. By the beginning of this century, the area of Xixi wetland had been sharply reduced to 10.08 square kilometers.
Within this 10 square kilometer, there are about130,000 permanent residents and nearly 10,000 migrants. Residents have enclosed about 3,000 pond turtles in the wetland circle and raised more than 25,000 pigs. "Human head", "pig head", "fish head" and "machine head (enterprise pollution)" discharge pollutants, the rivers in the wetland are blocked, the water quality is extremely poor, and the ecological function is gradually lost; Illegal buildings can be seen everywhere in the wetland, and the beautiful natural landscape of the wetland no longer exists; The poems, plaques and inscriptions of predecessors have been lost, and the artistic conception of wetland "cold, wild, light and elegant" has gradually faded. Xixi wetland is in danger of disappearing completely!
This situation has attracted the attention of Hangzhou Municipal Party Committee and Municipal Government. Wang Guoping, secretary of the Municipal Party Committee, visited Xixi Wetland for many times and made a decision to save Xixi Wetland! There are two modes of wetland protection in the world: fund protection and * * * protection. Xixi mode is the third mode. Which of the three models is more suitable for China's national conditions?
Huang Chunlei believes that the fund protection model, whose funds come from the society, is a common way of protection abroad, but this model can only protect small-scale wetlands, which is not feasible in China.
* * * The protection mode is suitable for economically developed areas, but it is also difficult at home. * * * Protection is only a limited protection for the core area. All 29 wetland reserves in China have adopted this model, but now they are all in trouble and struggling.
Xixi model is ahead in wetland protection. Combined with the reality of Xixi wetland, we should focus on maintaining the integrity of the ecosystem, protecting animals and plants and their habitats, coordinating the construction of facilities with the ecological environment, strengthening popular science education and environmental testing, and exerting ecological effects by protecting the ecological environment and biodiversity of the wetland ecosystem. By carrying out knowledge education on wetland ecosystem diversity and cultural diversity, its social effects can be brought into play; By strengthening legislation and other methods, we can correctly handle the effect of sustainable utilization, and finally realize the harmony between man and nature, man and man, history and reality, protection and utilization, and embark on a win-win model of Xixi National Wetland Park.
Xixi wetland is rich in animal and plant resources, and it is also the focus of comprehensive protection. Three protected areas, namely, ecological protection, ecological restoration and historical sites, have been designated, and a wetland science exhibition hall and three bioremediation pools have been set up. The blocks with good ecological environment, the best essence and the most wetland characteristics in Xixi Wetland are relatively closed and protected. The three ecological zones and ecological restoration zones cover an area of 3.25 square kilometers, accounting for about 94% of the total area of the first-phase protection project. At the same time, strengthen topographic consolidation, clean up collapsed ponds and dikes, and protect 383 fish scale pits. By increasing the variety of land-water relationship, optimizing vegetation allocation, setting up waterfowl habitats and artificial nests and other facilities, more animals and plants can find places to live and reproduce in Xixi. Therefore, we cherish the achievements of Xixi Wetland and related departments!
I think we can reduce the ticket price appropriately, add some scenic spots on the premise of protecting the original scenic spots, protect wild animals and make contributions to the construction of Hangzhou.
Ask the master to help write Tibetan poems! Ji Shi Xue Sai Yue Ming
Beautiful scenery is like a dream.
Middle-aged charm
Autumn wind adds elegance.
Life makes people love.
Be my daily companion.
Say it.
The fun is endless.
A 300-word proposal for emergency protection of mother river
Student:
The Yangtze River and the Yellow River, with their broad minds, gave birth to the 5,000-year-old Chinese civilization and irrigated the flowery land. They started a new era. They are our great mothers. The motherland needs them, the earth needs them and mankind needs them. They are the arteries of the heart of the motherland.
Since ancient times, faced with the magnificent scenery and long history of the mother river, many people have written immortal chapters and issued heartfelt songs.
Due to the progress of the times, more and more people invest in building factories. In order to seek more benefits, they do not hesitate to destroy the environment. Trees fell one after another. With the change of climate and uncontrolled reclamation and grazing, the vegetation on the Loess Plateau has been continuously destroyed, the soil structure has become loose, and the vegetation has become increasingly scarce, resulting in a large number of yellow sand being washed into the river, and the clear river water has lost its original beauty and clarity. Tens of millions of years ago, there were many lovely creatures living in the Yangtze River, our mother river. But now, due to serious river pollution, busy shipping (propeller jumping) and overfishing, the Yangtze River is losing this trait day by day, and the creatures in the Yangtze River are dying alone at an unpredictable speed. For the sake of these surviving creatures and our great mother river, I propose the following initiatives:
1. Plant more trees along the Yangtze River and Yellow River to prevent soil loosening.
2. Reduce water consumption.
3. Cut down less trees and reduce environmental pollution.
4. Take measures to prevent soil erosion.
Let's work together. Protecting the mother river means protecting ourselves.
Sponsor: Zhao Feng
C++ help ~ ~ expert access .. emergency # including
Use namespace std
Class b defines a class B.
{
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b(int I)； Declare a constructor with parameters
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{
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{
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{
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{
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I think something is missing. I just declared the class, but didn't define it. I'm just a beginner, please criticize me a lot. I'm new here, and I have expert advice.
Urgent! Seventh grade biology problem! A is vein, and the judgment is based on "blood flows from branch to trunk"
B is capillary, and the judgment is based on "connecting the smallest artery and vein"
C is the artery, and the judgment is based on "the direction of blood flow is from the main branch to the branch"
The fastest blood flow rate is C and the slowest is B.
Bleeding after LEEP knife operation, the wound begins to scab about 7 days after acute LEEP knife operation, and there will be a small amount of bleeding (if the bleeding is not as severe as menstruation, it is not a problem, which is also related to your usual exercise, and it seems that you will bleed more if you don't have much rest). Generally, it will be kept clean for about 20 days, and black or white scab will appear at the same time, which is a normal reaction.
If not, I'd better go to the hospital. I only had surgery for a few days.