为贯彻《中华人民共和国固体废物污染环境防治法》加强工业固体废物的控制,特制定本标准。 本标准是在工业固体废物有害特性试验与监测分析方法(试行》(国家环境保护局(86)环监字第114 号文颁布)样品的采集和制备一章的基础上,同时参考了国际上固体废物采样、制样技术的先进经验制定 的。 本标准此次为首次发布,于1998年7月1日开始实施。 本标准由国家环境保护局科技标准司提出。 本标准委托辽宁省环境保护科学研究所负责解释

5.1气团和锋 5.2锋面类型和天气 5.3气旋和天气

大气圈内的多种气体、水汽和固体等物质构成了人类和生物生存的自然空间。紧贴地表的对流层大气的物理现象变化尤其 重要,是人类研究环境的重要对象。大气的功能使人类受到保护

16.1应用生态学的概念和范围 16.2应用生态学理论框架 16.3应用生态学的研究方法 16.4应用生态学涉及的学科

云南植被分类系统 一、植被型组 二、植被型一高级单位 三、植被亚型

Plate Tectonics Geologic Tectonics Earthquake Tsunamis海啸 and Coastal Flooding

Plate Tectonics Geologic Tectonics Earthquake Tsunamis海啸 and Coastal Flooding

Atomic Structure All natural and most synthetic substances on earth are made from the ninety naturally occurring chemical elements. An atom is the smallest particle into which an element can be divided while still retaining the chemical characteristics of that element (fig 3. 1). The nucleus, at the center of the atom contains one or more particles with a positive electrical charge(protons fif and usually some particles of similar mass that have no charge(neutrons

人口 Nature and Rate of Population Growth Growth Rates: Causes and Consequences Growth Rate and Doubling Time

1、早期的太阳系 The Early Solar System Billions of years ago, out of a swirling mass of gas and dust, evolved a system of varied planets hurtling around a nuclear-powered star-our solar system. One of these planets, and one only, give rise to complex life forms. Over time