大量使用

But it is difficult to find a perfect method to control drum boiler's corrosion. Now deoxidization water chemistry for drum boiler has the characteristics of high corrosion speed, high Fe content in feedwater and boiler water, high scaling speed, short chemical cleaning interval and needing poisonous chemical deoxidant, etc.

火力发电站由于大量使用金属材料，并且金属材料的使用环境大都接近其极限使用条件，因而常由腐蚀而引发事故，造成重大损失。

ABSTRACT In the process of rare earth production, large amount of sulfuric acid, hydrochloric acid and ammonia are consumed, However, there are large amount of sulfuric acid, hydrochloric acid or ammoniacal nitrogen in solutions or discharged waste water which need to be treated.

稀土冶炼过程中，一方面大量使用硫酸、盐酸及氨等化工原料，另一方面，在生产过程的某些中间环节或排放的废水当中，又含有大量的硫酸、盐酸或氨氮化合物需要处理。

The researcher finds that the use of ethno plants of the ancestors is amazingly wise, and it also respects the harmony of nature. The masculine plants with large number and fast growing are mostly used, such as Miscanthus and .Macaranga. used as firewood. As to the plants growing more slowly, ancestors cherished them and used them effectively and appropriately according to their characteristics.

民俗植物调查的结果发现先民对植物的利用是很有智慧的，也十分能尊重自然的协调，对於族群大、生长快的阳性植物常使用得最多，例如五节芒、野桐、白匏子等大量使用於薪材；对於生长慢数量少的植物，则珍惜资源有效使用，充分了解依据植物生长的特性，做适时适当的运用。

objective to study the risk factors on esbl producing strains of k.pneumoniae and e.coli.methods aprospective survey on esbl producing strainsof k.pneumoniae and e.coli for a36-month period.results the resistance rates ofe.coli were:98.08%for ctx,73.08%for amc.the resistance rates of k.pneuˉmonialwere;95.74%for ctx,97.87%for amc.the use rate of third generation cephalosporins was much higher than those of esbls nonproducing strains（p.05）.it induce esbls that3rd generation cephalosporins were used extensive.after strenghtening the antibiotic controls,esbls detection rate has gone down.conclusion the factors of infection of esbl-producing strains were the severity diseases,cellular immunological condition,improper medical manipulations.to prevent esbl-producing strains,reasonable antibiotics usage may be the effective measure.

目的 分析临床大肠埃希菌及肺炎克雷伯菌产esbls的危险因素，并加以控制。方法前瞻性监测产esbls菌的情况，并对感染者进行临床调查。结果产esbls的大肠埃希菌、肺炎克雷伯菌的耐药率头孢噻肟钠为98.08%和95.74%，阿莫西林+棒酸为73.08%和97.87%，产esbls菌感染者头孢第三代的使用率（70.21%）显著高于非产esbls菌感染者（39.47%）（p.05）；第三代头孢的大量使用诱导esbls的产生。通过加强抗感染药物的使用管理esbls检出率开始下降。结论严重的基础病、高龄、机体免疫力低下，长期住院者是esbls菌感染的易感宿主，皮质激素、化疗及介入性疗法是esbls感染的高危因素。滥用抗感染药是产生esbls的重要因素，合理使用抗感染药是防止esbls产生的主要措施。

Letter of Credit transaction follows two basic principles: absolute nonobjective and strict compliance principles, this two principles is the main reason for causing Letter of Credit cheating; much profits makes many speculators to do Letter of Credit cheating; and because the bank's negotiation documents have not stable forms, the banes can forge them; it increases the possibilities of Letter of Credit cheating to have many middleman as well as large usage of transferable Letter of Credit; it is one of the reasons for Letter of Credit cheating occurred that the foreign traders have lower quality and the cheated persons have lower sense of precaution.

信用证交易遵循两大基本原则：独立抽象性原则和严格相符原则，这两个原则是造成信用证欺诈的主要原因；暴利驱使大量的投机商从事信用证欺诈活动；作为银行付款凭证的单据，目前并无统一固定的格式，均可进行伪造；国际贸易中中间商的大量存在和可转让信用证的大量使用，增加了欺诈的可能性；从事国际贸易的业务人员素质低和被欺诈人防范意识差、知识缺乏也是信用证欺诈屡屡得手的原因之一。

Along with enterprise paying more attention to the importance of quality detection and detection instruments using popularly,a lot of information is stored, so it is urgent to build dealing with detective data information system. This system could get timely product quality data, and grasp the quality change trend in order to support effectively maintenance of old products and decision-making for new product development, as well as help the quality detection personnel extricating of repeated , burdensome statistic and handworked work,This paper firstly bring forward storing tabacco-quality-detection data by using database technology,aiming at data storing of product detection and further analyzing demand.

随着企业对质量检测重要性认识的不断加大，检测仪器的大量使用，许多企业已经积累了大量的检测数据，迫切需要一套储存、加工处理分析检测数据的信息系统，把质量检测人员从重复繁杂的统计计算和手工作业中解脱出来，获取及时的产品质量数据，实时把握产品质量变化趋势，以求更有效地支持老产品的维护和新产品开发的战略决策。

In recent years, because of waste water discharging, extensive usage of agricultural fertilizer which is then brushed into the sea with rain, and extensive development of feeding fish breeding and poultry raising industry offshore, the offshore sea water contains large quantity of inorganic nitrogen, inorganic phosphate, and other inorganic nutrient and soluble organic matter, which has provided perfect environmental conditions for algae growing.

近些年来，由于污水排放，农用化肥大量使用并随雨水流失，近海给饵养殖业的广泛发展，使近岸海水含有大量无机氮，无机磷等无机营养素及可溶性有机物，为藻类生长提供了良好的环境条件。

It is also a set of rating which is used wiedely in the field of bidding of project construction of water works and power plants in each province and city of the country(such as the water works'sheet iron sendimentation tank engineering,the power plant's circulating water supply and drainage system engineering,etc.).

施工企业一般在建设项目投标中大量使用的是预算定额，对于概算定额的使用较为生疏。同时也不难发现，实际使用中与预算定额的报价要求存在较大的差距。

But the use of Sn/Pb alloy solder is one of the important sources of pollution in manufacture and use of Sn/Pb solder process, because of the melting temperature is higher, there are lots of lead steam escaping, will directly affected operation personnel's physical health.

大量使用的Sn/Pb合金焊料正是造成污染的重要来源之一，在制造和使用Sn/Pb焊料的过程中，由于熔化温度较高，有大量的铅蒸气逸出，将严重影响操作人员的身体健康。

A considerable amount of high energy consumption and rare copper and silicon steel, theft and destruction of serious, large-scale use at the same time, will lead to greater environmental pollution and energy waste.

耗用大量高能耗且稀有铜材和矽钢，被盗和破坏严重，同时大量使用，将导致更大的环境污染和能源浪费。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。