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Water pollution affects man’s health, recreational use of water, industrial of water and sense of beauty. The spread of water-ca
Water pollution affects man’s health, recreational use of water, industrial of water and sense of beauty. The spread of water-ca
admin
2013-02-24
29
问题
Water pollution affects man’s health, recreational use of water, industrial of water and sense of beauty. The spread of water-carried disease is of great concern. In highly【S1】countries in particular, emphasis has【S2】from concern over bacterial disease to concern over water-carried viral(病毒性的)disease. Viral hepatitis(肝炎), for example, has been found to【S3】more frequently in cities whose water supplies have【S4】high levels of water impurity. Poisonous chemicals found in streams that are ultimately used for water supplies also create an important public health problem.
It is clear that poisonous【S5】must be excluded from water, but more and more chemicals from new pesticides, fertilizers, and other new products have been found in water. Since the public health【S6】of these chemicals is not yet fully known, they are of increasing concern. The chemicals from fertilizers are also finding their way into water supplies from groundwater pollution.
As man’s desire for water-based recreation increases, greater demands are placed on the quality of water; The water must not only be【S7】in appearance but also meet certain other conditions. Sports such as swimming involve【S8】contact with water, and so water standards are raised higher.
The range of water quality necessary for【S9】processes varies greatly with the intended use of water. The water used in steel mills, for example, must have a lower chloride(氯物)level than that accepted for drinking water. Cooling water can often be of Comparatively low sanitary quality. A large part of the water used in the paper-making industry can be of relatively low quality in some aspects, but must【S10】little iron and carbon dioxide.
[A] balanced [I] chemicals
[B] developed [J] occur
[C] affect [K] attractive
[D] contain [L] significance
[E] consistently [M] direct
[F] creatures [N] comparatively
[G] shifted [O] industrial
[H] agricultural
选项
答案
B
解析
该空格前为副词highly,空格后为名词countries,因此该空应填入一个形容词。结合句意“特别是在高度______国家,关注的重心已经从细菌疾病______到通过水传染的病毒性疾病”,可知只有B(发达的)符合句意。
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0
大学英语四级
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