1反应 2A（（g）=2B（g）+E（g）（正反应为吸热反应）达到平衡时，要使正反应速率降低，A 的浓度增大，应采取的措施是（ ）。 A、加压；B、减压；C、减小 E 的浓度；D、降温 D

一、基础知识 （一）标准化基础知识 （ ）1．在国家、行业标准的代号与编号 GB/T 18883－2002 中 GB/T 是指（ ）。 A．强制性国家标准 B．推荐性国家标准 C．推荐性化工部标准 D．强制性化工部标准

1、中华人民共和国第一部药典颁布时间 A．1951 年 B．1953 年 C．1957 年 D．1952 年 E．1955 年 2、现行的中国药典是哪年版 A．1985 年版 B．1990 年版 C．2005 年版 D．1995 年版 E．都不是

The first three types of control devices we consider--gravity settlers, cyclone separators, and electrostatic precipitators--all function by driving the particles to a solid wall, where they adhere to each other to form agglomerates that can be removed from the collection device and disposed of

The activated-sludge process is now used routinely for biological treatment of municipal and industrial wastewaters. The antecedents of the activated-sludge process date back to the early 1880s to the work of Dr. Angus Smith, who investigated the aeration of wastewater in tanks and the hastening of the oxidation of the organic matter

Important physical characteristics of MSW include specific weight, moisture content, particle size and size distribution, field capacity, and compacted waste porosity. The discussion is limited to an analysis of residential, commercial, and some industrial solid wastes. Note, however, that the fundamentals of analysis presented in this and the following chapter are applicable to all types of solid wastes

Operations used for the treatment of wastewater in which change is brought about by means of or through the application of physical forces are known as physical unit operations. Because physical unit operations were derived originally from observations of the physical world, they were the first treatment methods to be used. Today, physical unit operations, as shown on Fig. 5-1, are a major part of most wastewater

The constituents of concern found in wastewater are removed by physical, chemical, and biological methods. The individual methods usually are classified as physical unit operations, chemical unit processes, and biological unit processes. Treatment methods in which the application of physical forces predominate are known as physical unit operations

Determining wastewater flowrates and constituent mass loadings is a fundamental step in initiating the conceptual process design of wastewater treatment facilities. Reliable data for existing and projected flowrates affect the hydraulic characteristics, sizing, and operational considerations of the treatment system components

An understanding of the nature of wastewater is essential in the design and operation of collection, treatment, and reuse facilities, and in the engineering management of environmental quality. To promote this understanding, the information in this chapter is presented in eight sections dealing with (1) an introduction to the constituents found in wastewater