Then fill in each blank with a word from the text.

Listen to the story. Choose a word to fill in each blank.

听故事，选词填空。

Characteristics Analysis of Banked Cloze& A New Test Type in CET-4

大学英语四级考试选词填空题型特点分析

Fluorescence characterization of the reactivity of THMs precursors in secondary effluent

污水厂二级出水中THMs前体物卤代活性荧光光谱分析

Field data from a typical waterworks demonstrated that the model could well predict the probability distribution of the concentration of permanganate index, ammonia nitrogen and four kinds of trihalomethanes ( THMs).

典型水厂的现场监测数据表明，该模型能够较好地模拟水厂中高锰酸盐指数、氨氮以及4种三卤甲烷的浓度概率分布。

Factors Affecting Formation of THMs During Dissolved Organic Nitrogen Acetamide Chlorination in Drinking Water

溶解性有机氮乙酰胺氯化生成饮用水THMs的影响因素研究

THMs and HAAs produced in prechlorination process account respectively for 22% and 50% of their maximum concentration in the network;

预氯化产生的THMs、HAAs分别占管网中此类物质最高浓度的22%和50%；

The traditional process of raw water treatment has not only worked very well to most trace organic compounds in raw water, but also produce lots of THMs which can cause cancer.

传统的常规水处理工艺已经不能很好的去除水中大部分微量有机污染物，而且会生成大量含有三致作用的三卤甲烷类消毒副产物。

The UFC test was used to evaluate the effects of four common water treatment techniques on the removal of THMs precursors.

采用UFC方法评价了四种常用水处理工艺对THMs前质的去除效果。

The effect of chlorination conditions ( temperature, chlorine dose, bromide ion concentration, reaction time) on THMs production was simulated in the laboratory.

在实验室内模拟氯化条件（pH值、温度、投氯量、溴离子浓度、反应时间）对东江下游深圳水库源水氯化消毒副产物THMs产生的影响。

Precusors of THMs in soil extract from Harbin

哈尔滨土壤提取液中的卤代前驱物

The deterioration of raw water quality caused by water pollution and the deficiency of conventional water treatment technique results in the drinking water containing THMs, MX and other organic pollutants which seriously threaten human health.

水环境污染造成的饮用水源水水质下降及传统给水处理工艺的缺陷导致饮用水中含有THMs，MX等致癌物及其它有机物，严重威胁人体健康。

A larger number of studies in animals experiment demonstrated that THMs is carcinogen. Some epidemiology studies also show THMs is harmful to human Health.

大量的动物实验研究显示：THMs具有致癌性，部分流行病学研究显示其对人体健康有害。

Under the condition of same original water, the THMs and HAAs produced from sequential chlorination disinfection technology was 35.8%~ 77.0% and 36.6%~ 54.8% less than those from free chlorination.

相同原水条件下，顺序氯化消毒工艺产生的三卤甲烷浓度比游离氯消毒工艺减少35.8%~77.0%；卤乙酸减少36.6%~54.8%。

The results show that high concentration NO-2-N in water can consume ozone dosage by 40% and reduce the removal rate of THMs precursor and the enhanced degree of biological degradation ability of water after ozonation.

结果表明，水中较高浓度的NO-2-N可消耗臭氧投加量的40%左右，并降低了臭氧对THMs前体物的去除率，也影响其提高水中可生物降解有机物浓度的能力；

This paper expounds the developing situation of halogen disinfecting by-product in drinking water ( THMs and HAAs), analyzes on the harms of the by-product to human health, introduces the effective paths of eliminating the by-product, and looks forward to the research directions in the future.

论述了饮用水卤代消毒副产物（三卤甲烷和卤乙酸）的研究现状，分析了其对人类健康的危害，介绍了去除副产物的各种有效途径，并展望了今后的研究方向。

The results show: ① Organic compounds with molecular weight ( MW) between 3-10 ku are the major THMs precursors in Guangzhou section of Pearl River;

结果表明：①分子质量在3~10ku间的有机物是珠江广州段源水中最主要的THMs前驱物；

The results show that the THMs are the major disinfection by-products in water before disinfection.

研究结果表明，两市水处理工艺中，消毒前水中消毒副产物以三卤甲烷类消毒副产物为主。

And the concentration of THMs and HAAs also increased with increasing temperature in the normal range.

正常气温条件下，THMs及HAAs的生成量随温度的增加而增加。

Theses and researches formation of trihalomethanes ( thms) in drinking water disinfection with five kinds of disinfectants

五种消毒剂消毒饮水后形成三卤甲烷的研究

The study on the correlation between organic pollution index and THMs preliminary study on Correlativity of reduction criteria in polluted water

天然水源水中有机污染指标与氯消毒后三卤甲烷形成的相关性初步探讨污染水中还原性指标相关性探讨