zhuliangli
电的生产过程极为复杂，需经过发电、输电、配电以及用电等多个过程。其中发电指的是生产电能的地方，例如：火电单位、水电单位等；输电是指利用高压线路完成电力输送的操作；变电指的是利用高压变电将高压电压、超高压电压等电能转变成低压电能；配电为最后一步，降压电能并将其输送给用电者。电力系统输变电工程项目重视输电与变电两个步骤。随着我国用电需求的急剧增加，急需电力系统输变电工程来承担电力系统的输送与供应。多个输变电项目合在一起，就构成了我国电网的主架。现阶段，我国的输变电工程普遍存在110kv、220kv、330kv、500kv等多个电压等级，其中220kv在我国的使用频率较高；330kv普遍存在于我国西北电网中；500kv级别最高，费用、容量、工艺等的要求较高、较先进。目前，我国极为重视500kv电网的建设，属我国电网中的中坚力量。输变电工程属于电网主网架建设中的重要工程项目，包括输电线路工程与变电所工程，所需费用较高，工程施工极为复杂，施工技术要求高。输变电工程一般包括电气安装、通信及自动化、土建、电气设备调试、系统启动调试等。其中电气安装包括高压设备等一次设备的安装，也包括保护与控制系统等二次设备的接线与安装；通信及自动化指的是通信工程与变电所自动化；土建涵盖设备基础、建筑物工程、四通一平、构架基础等；电气设备调试就是对安装的一次设备与二次设备进行试验与调整；系统启动调试指的是在输变电工程建设施工结束后，对输电线路与变电所的运行情况进行启动调试。电力系统输变电工程项目管理的现状不重视工程进度的协调性电力系统输变电工程项目与其他项目存在很大不同，电力系统输变电工程的的要求更高，要求施工进度严格按照规定要求进行，以保证工程建设按时竣工。现阶段，我国多数电力企业不重视电力系统输变电工程项目进度的管理与协调性，严重影响工程质量，既降低了施工人员与工程师掌控工程进度的能力，又对工程效益与工程质量产生极大的影响。少数电力系统输变电工程仅仅重视工程进度，缺乏工程质量的监管，造成城市电力紧缺的问题。
旅游新四力
Advantage and disadvantaged of sharing chopsticks. as we know. chopsticks are our Chinese tableware. public chopsticks can reduce pollution and more sanitary. but the feeling of the family is very raw. not warm.
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A: In the 17th century, when a British businessman heard that there were 100 million people in China, he was determined to go there and sell spoons. He thought, even if a spoon would only sell for one penny, he would still make 100 million pennies, but he didn’t succeed. The Chinese people used chopsticks, not spoons.B: Some people did some research on the origin of China’s chopsticks compared to the knife and fork in the West. One theory is that China was an agricultural society and relied on vegetables for food. Chopsticks were very convenient tools for eating. The Westerners, on the other hand, were nomads and lived on meat. The knife and fork were more practical. Others believe that China did not have much industry, and therefore people used chopsticks. The West was an industrial society, so their eating utensils were made of metal. A: Sounds interesting! When I first learned that the Chinese use a pair of sticks to eat with, I was curious how they would drink soup. Just like the Indians who use their fingers to eat, do they also use their fingers to drink soup?B: Whatever the reasons why the Chinese use chopsticks and Westerners use knife and fork, it is a result of their respective cultures. Chinese culture is developed around collectivism which stresses communion and harmony. Western culture emphasizes individualism. In terms of eating customs, chopsticks and knives and forks are two desperate expressions of this cultural difference. The Chinese like to have communal meals where everybody eats out of the same bowl of food. Chopsticks were used in order to discourage people from eating more than others. This was not only a good way to preserve collectiveness, but also to limit individualism. It is more straightforward in the West. People eat their meals on their own, and there is no restriction on how to eat. A: That sounds quite reasonable.B: In addition, table manners are very strict during the Chinese meal. Respect has to be given to the elderly. Eac
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