Water problems in the future will become more intense and more complex. Our increasing population wi
Water problems in the future will become more intense and more complex. Our increasing population will tremendously increase urban wastes, primarily sewage. On the other hand, increasing demands for water will decrease substantially the amount of water available for diluting wastes. Rapidly expanding industries which involve more and more complex chemical processes will produce large volumes of liquid wastes, and many of these will contain chemicals which are poisonous. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever-increasing quantities of agriculture chemicals. From this, it is apparent that drastic steps must be taken immediately to develop corrective measures for the pollution problem.
There are two ways by which this pollution problem can be lessened. The first relates to the treatment of wastes to decrease their pollution hazard. This involves the processing of solid wastes prior to disposal and the treatment of liquid wastes, or effluents , to permit the reuse of the water or best reduce pollution upon final disposal.
A second approach is to develop an economic use for all or a part of the wastes. Farm manure is spread in fields as a nutrient or organic supplement. Effluents from sewage disposal plants are used in some areas both for irrigation and for the nutrients contained. Effluents from other processing plants may also be used as a supplemental source of water. Many industries, such as meat and poultry processing plants, are currently converting former waste production into marketable byproducts. Other industries have potential economic uses for their waste products.
26. The purpose of this passage is_______.
A. to warn the reader of the dwindling water supply
B. to explain industrial uses of water
C. to acquaint the reader with water pollution problems
D. to demonstrate various measures to solve the pollution problem Which of the following points is not included in the passage?
A. Industrial development includes the simplification of complex chemical processes.
B. Diluting wastes needs certain amount of water.
C. Demands for water will go up along with the expanding population.
D. Intensive cultivation of land requires more and more chemicals. The reader can conclude that_______.
A. countries of the world will work together on pollution problems
B. byproducts from wastes lead to a more prosperous marketplace
C. science is making great progress on increasing water supplies
D. some industries are now making economic use of wastes
The author gives substance to the passage through the use of_______.
A. interviews with authorities in the field of water controls
B. opinion and personal observations
C. definitions which clarify important terms
D. strong argument and persuasions
The words prior to probably mean_______.
A. after B. during
C. before D. beyond
答案:26. C 27. A 28. D 29. B 30. C
牛津实用英语语法:325 must和needn’t
牛津实用英语语法:295 care,like,love,hate,prefer
牛津实用英语语法:285 might表示请求
牛津实用英语语法:316 say,tell及其他可替代使用的引导动词
牛津实用英语语法:287 劝告的形式
牛津实用英语语法:262 动词+所有格形容词/宾格代词+动名词
牛津实用英语语法:270 go on,stop,try,used(to)
牛津实用英语语法:328 从属连词
牛津实用英语语法:259 介词之后的动名词
牛津实用英语语法:329 though/although和in spite of
牛津实用英语语法:260 to
牛津实用英语语法:322 let’s,let us,let him/them用于间接引
牛津实用英语语法:289 建议
牛津实用英语语法:298 表示偏爱的另一些例句
牛津实用英语语法:292 as if/as though+ 虚拟过去时
牛津实用英语语法:303 主动和被动时态对照表A 时态/
牛津实用英语语法:257 形式和用法
牛津实用英语语法:314 间接引语中的时间及地点表达法
牛津实用英语语法:300 wish+ 主语+ 虚拟过去时
牛津实用英语语法:280 误连分词
牛津实用英语语法:284 could/will/would you?等表示请求
牛津实用英语语法 :319以 will you?/would you?/could you?
牛津实用英语语法:291 虚拟现在时的用法
牛津实用英语语法:301 wish(that)+主语+would
牛津实用英语语法:304 被动态的各种用法
牛津实用英语语法:271 be afraid(of),be sorry(for)
牛津实用英语语法:277 代替从句的现在分词短语
牛津实用英语语法:345 位于某些名词之后的that从句
牛津实用英语语法:269 agree/agree to,mean,propose
牛津实用英语语法:314 间接引语中的不定式和动名词结构
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