1、水样采集、保存和预处理是关系分析结果准确可靠的重要环节； 2、水样采集要保证代表水的全面性；

我国颁布《城市供水水质标准》 水质检测更严格。从建设部获悉，我国《城市供水水质标准》 出台，并将于２００５年６月１日起开始实施。 据建设部有关负责人介绍，《城市供水水质标准》 对水质提出了更高的要求，与现行的国标《生活饮用水卫 生标准》（1985年颁布）相比，检测项目由35项增加到 93项，包括一些分量检测，总项目达101项，其中常规检 测项目42项，非常规检测项目59项

Ⅰ. TO EXPLANATE THE FOLLOWING TERMS ( Ten terms , 2 marks per term, total 20 marks) 1. Ore; 2. Gangue Minerals; 3.Non-ferrous metal (Base metal); 4. Precious metal; 5. Sulfophilic elements; 6. Host Rock; 7. connate water; 8. Country Rocks; 9

PERCENTAGE FAT, WATER, AND SUGARS IN FOODS Methods in Chapters 3 and 4 are usually designated as applicable to either fatty

First set to operation Before putting into operation for the first time check that: All connecting pipes and flanges specially on the suction side, are completely tight

中华人民共和国国家标准：海水水质标准（GB 3097—1997）Sea water quality standard

Extrusion cooking is a relatively recent form of food processing. Forcing material through a hole is the process of extrusion. Sausage extruders were devel￾oped in the nineteenth century as simple forming machines. Eventually pasta was produced in extruders. Flour and water were added at one end of the machine

Open systems using gravity tanks, etc., are rarely met nowadays and Figure 1.8 shows a characteristic arrangement of pressure tanks, calorifiers and pumps for a large ship. The fresh water pumps are self-priming, drawing from storage tanks and discharging through filters to a rising main, branched to give a cold supply and a hot supply in closed circuit through a calorifier. A tank kept under pressure by an external supply of compressed air rests on the system and provides the head necessary

In motorships the oil, after passing through main and motion bearings and oil-cooled pistons, etc., is either retained in the bedplate or flows by gravity to a sump tank. In either case, the oil pumps, which may be self￾priming, submerged centrifugal or rotary positive displacement, draw the oil through magnetic strainers and discharge to: filters - oil coolers - engine lubricating and/or cooling manifolds

In motorships there are two main circuits, one salt , one fresh. The salt circuit is: sea inlet box (seachest) - pump(s) - f.w. coolers in series (first LT then HT) – turbo blower aftercoolers in parallel (if any) – provision condenser in parallel (if any) - overboard