题目内容

在生物界可将稀有物种分为广泛分布的稀有种，具有严格地理区域的地方种，分隔种群，边缘种群，濒危种。()

查看答案

搜索结果不匹配？点我反馈

更多问题

论信息系统建设的网络规划
网络规划在信息系统建设中占有重要地位，一方面要满足信息系统的应用需求；另一方面受到信息系统覆盖的地理空间范围、资金和其他资源约束。既要满足当前信息系统的需要，又要满足未来发展的需要，即网络规划方案不仅要有实用性，而且还要有扩展性。
请围绕“信息系统建设的网络规划”论题，依次从以下3个方面进行论述。
1．概要叙述你参与规划、设计的信息系统的应用需求及你在其中所担任的主要工作。
2．深入论述你参与设计的信息系统网络规划主要涉及哪些方面？这些方面是如何满足信息系统应用需求并且具有实用性和扩展性？
3．简要叙述你参与的信息系统的网络规划方案中，除了实用性和扩展性外，方案中还有哪些特性需要考虑？

自然保护区是一种具有多种功能的自然区域，与经济、技术、社会有着密切的联系。自然保护区的任务是在保护自然的前提下，为人类服务，为经济、社会发展服务。()

大堡礁国家公园位于澳大利亚东北昆士兰州东海岸。南北长2000多公里，东西宽50-160公里左右，由2900多个珊瑚礁岛组成，是世界上最大的天然海洋公园，也是世界七大自然景观之一。()

听力原文： Speaker One
Man: Good morning. This is Daily Business Report. Shanghai gets western gas. Gas started pumping through the huge West-to-East Natural Gas Pipeline on Friday, sending gas from the Tarim and Chongqing gas fields in western Xinjiang and Shanxi Provinces to Shanghai. At 9:00 am on National Day, PetroChina President Jiang Jiemin pushed a button at a gas compression station at Jingbian in Northwest China's Shanxi Province to launch the 4,000-kilometre-long pipeline Construction of the pipeline began on July 4, 2002 and cost more than 140 billion yuan (US $16.9 billion). It will transmit 12 billion cubic meters of gas a year.
Speaker Two
Woman: China and Russia are going to build hi-tech parks. President of Chinese Academy of Sciences (CAS) Lu Yongxiang said in Beijing Thursday that his academy and the Academy of Sciences of Russia (ASR) planned to build hightechnology parks both in Northeast China and in Russia's Novosibirsk. Representatives from CAS Changchun Academy and the ASR Siberia Academy signed a memorandum on seven cooperative projects Thursday morning at CAS headquarter. While carrying out the new form. of science and technology cooperation in building the hi-tech parks, Lu acknowledged, the two sides need to start appropriate research projects on the principle of equality and reciprocity. N. L. Dobretsov, vice ASR president who aim heads ASR Siberia Academy, said the hi-tech parks will epitomize increased cooperation between Russian and Chinese science communities.
Speaker Three
Man: Shanghai Volkswagen Corporation declared Tuesday a price-cutting plan for its car parts aiming to increase its market share in China. According to the plan, hundreds of components for Passat and Polo, its two dominant cars in China, will get large price cuts of between 25 and 80 percent starting Oct. 1. The price adjustment "will offer more preferential prices and lower the maintenance costs for consumers" as the corporation has formed "batch-produced ability for components" and set up an "after-sale service network" around the country, said a company spokesman. The spokesman said insurance premiums and purchasing and usage costs will also decline. Consequently, the two cars will become more competitive and help consumers regain confidence in the car market. China's car market is price-sensitive, but experts noted that price cuts only have short-term effects. In the long run, other factors will win out. Shanghai Volkswagen is one of the top car sales companies in China.
Speaker Four
Woman: China strives to build the "remanufacturing" industry as one of its pillar manufacturing industries, said Xu Binshi, member of the Chinese Academy of Engineering, in Beijing Wednesday. "China will also set up related auxiliary industries, aiming to promote the national economy and realize re-employment and sustainable development," said Xu at a national workshop on "recycled economy". He went on to say that remanufacturing and self-renovation are considered in China's medium and long-term plans as a priority development theme and a key technology in the manufacturing sector. From the 1990s on, there have been enterprises in China studying remanufacturing, said Xu. Although the remanufacturing project is yet to be mature, he said, it is a "sunrise industry" and a potential giant industry, which has the ability to improve the quality and performance of products, reduce material consumption, save energy resources and protect the environment. Xu added that the crucial step of putting forward China's remanufacturing industry is to establish relevant laws and standardize business activity and market operation.
Speaker Five
Man: China plans to regulate fireworks industry. The Chinese government is planning to strengthen safety supervision over its scattered fireworks manufacturers to reduce the rising risks of accidental fireworks explosions. Sun Huashan, deputy dir