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Find out the meanings of the following new words in the new era (Exercise 5 of the second volume of the Chinese book for the fifth grade of primary school published by Jiangsu Education Publishing Hou
Find out the meanings of the following new words in the new era (Exercise 5 of the second volume of the Chinese book for the fifth grade of primary school published by Jiangsu Education Publishing House) Low carbon: refers to the low (low) emission of greenhouse gases (mainly carbon dioxide). With the development of world industrial economy, the rapid increase of population, the unlimited rise of human desire and the uncontrolled production and lifestyle, the world climate is facing more and more serious problems, carbon dioxide emissions are increasing, the ozone layer of the earth is suffering from an unprecedented crisis, and global catastrophic climate changes appear frequently, which has seriously endangered the living environment and health and safety of human beings. Even the rapid growth or expansion of GDP that mankind once prided itself on is "greatly discounted" by environmental pollution and climate change (therefore, the country).

Emission reduction: emission reduction can be divided into broad sense and narrow sense. In a broad sense, emission reduction refers to reducing the emissions of wastes and environmental hazards (including three wastes and noise); Narrow sense of emission reduction refers to reducing the emission of environmental hazards.

New energy: refers to energy that has only been used in recent years, or energy that has been used in the past and now has a new way of utilization. The former are nuclear energy, geothermal energy, ocean energy, solar energy and biogas. And the latter is wind, tide, etc.

Light rail: the definition and specification of light rail first came from UMTA in the United States, and the "portability" of light rail came from UMTA's description of this mode of transportation. In this paper, "light" means "used for light load and fast movement", rather than reflecting the body weight. In fact, "light" means light load. Instead of light axle load and rail load, it has nothing to do with axle load and rail load at all. Many people misunderstand that light rail means light rail. In fact, the rail weight of light rail often exceeds that of national railway, which is not light at all. Generally refers to trams and railway trains mixed with road traffic, also known as light rail rapid transit and light rail, or light rail for short. "Mixed traffic" is the key to this definition, not capacity. Chinese mainland sometimes calls this kind of light rail a tram,

High-speed rail: High-speed rail is a high-speed railway, which refers to a railway system with an operating speed of more than 250 kilometers per hour by transforming the original line (linearization and gauge standardization) or building a new "high-speed new line". High-speed railway not only needs to reach a certain speed standard in operation, but also needs to be upgraded in terms of vehicles, tracks and operations. Generalized high-speed railway includes high-speed railway transportation system using magnetic levitation technology.

Magnetic levitation: a technical measure to keep an object in a certain position along one axis or several axes by using magnetic field force. Maglev train is a kind of train driven by magnetic levitation force (magnetic attraction and repulsion). Because of the magnetic force of its orbit, it is suspended in the air and does not need to touch the ground when walking, so its resistance is only the resistance of air. The maximum speed of maglev train can reach more than 550 kilometers per hour, which is faster than the maximum speed of wheel-rail high-speed rail of more than 400 kilometers per hour.

Group purchase: Group purchase is also called collective purchase, which is the abbreviation of group purchase and collective purchase. Its essence is to gather scattered consumers with the same purchase intention and make large-scale purchases from manufacturers (wholesale in essence). The price of commodity wholesalers is much lower than that of retailers, because wholesalers produce a lot of goods. The premise of enjoying this price is that they must meet the requirements of the manufacturers. Group purchase products include decoration building materials, household goods, automobiles, houses, household appliances, computers, daily necessities and other fields.

Slimming: refers to losing weight by artificial means, especially reducing body fat and making the body slimmer and slimmer.

Self-help tour: Self-help tour is a new way of traveling in recent years. For example, in a supermarket, all products (services) are clearly marked, and tourists can freely choose the tourism type of service combination according to their own conditions (including time, budget, physical condition, etc.). ). All the things involved in the trip, such as eating, living, traveling, shopping, entertainment, etc., are handled by yourself, which is cumbersome to operate, but it is more arbitrary, free and full of diversified personality elements.

Self-help tourism is no longer a patent for young people, nor is it synonymous with saving money, but has become an important tourism trend. People of all ages who want to enjoy free, in-depth and distinctive tours will join the ranks of self-help tours.

However, there are still many people who have a wrong understanding of self-help tourism. Many people think that self-help travel is a way to save money, and the rough content of travel may lead to many dangers. The hotel will feel unsafe without booking. In fact, if we deeply understand the characteristics of self-help tourism, we will find that self-help tourism is a quite exquisite and distinctive form of tourism. Self-help tour allows all expenses to be controlled according to your own preferences, the itinerary can be flexibly adjusted, and you can gain a deeper understanding of local customs. Self-help tour is by no means a more fun and cheaper way to travel, but to spend more time in the same place to deeply understand the characteristics of this place, get in touch with local people and things, see what you want to see and take the road you want to go. The following analyzes the characteristics of self-help tourism from different levels:

Different from the general tour mode.

Generally, tour groups are limited by the consideration of group and cost, so most of the travel modes remain unchanged. Every place, the tour leader will give tourists a period of time to visit and take pictures, then go to the next stop and show them as many places as possible. This can meet the requirements of most people for travel, hoping to see the most things in the shortest time. In fact, there is nothing wrong with this form of tour group itself, except that participants must cooperate with the group, so passengers feel that their actions are bound everywhere. In addition, for the unity and safety of group action, and to avoid the inconvenience or delay caused by any individual action, the team leader is often reluctant to let the members act alone.

Tourism content has strong autonomy.

Blog, also translated as blog, blog or blog, is a website that is usually managed by individuals and publishes new articles from time to time. The articles on a blog are usually arranged in reverse order according to the posting time. Many blogs focus on providing comments or news on specific topics, while others are regarded as personal diaries. A typical blog combines text, images, links to other blogs or websites, and other media related to the topic. Being able to let readers comment in an interactive way is an important element of many blogs. Most blogs are mainly written, but some blogs focus on various topics, such as art, photography, video, music and podcasting. Blog is a part of social media network.

Follow-up: write down your own opinions at the back of the post, which is called follow-up, also called reply. The so-called sofa, bench, floor, irrigation, etc. It is a form of follow-up.

E-book: A portable e-reader into which digital publications can be injected by connecting to the Internet or inserting cards. It can store thousands of pages of data and consists of a black-and-white or color LCD screen and simple button operation components.