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 supplyB. to explain industrial uses of water C. to acquaint the reader with water pollution problems外语学习网D. to demonstrate various measures to solve the pollution problemich 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 problemsB. byproducts from wastes lead to a more prosperous marketplaceC. science is making great progress on increasing water supplieswww.examw.comD. some industries are now making economic use of wastesThe author gives substance to the passage through the use of_______. A. interviews with authorities in the field of water controlsB. opinion and personal observations C. definitions which clarify important termsD. strong argument and persuasions The words prior to probably mean_______. A. after B. during C. before D. beyond 26. C 27. A 28. D 29. B 30. C
复合不定代词的三个重要语法特点
none 可用作哪些句子成分
不定代词用作状语
疑问代词的语法要点
不定代词语境性考题一例
another还是the other
one…the other还是one…another
表示“两者”的不定代词
反身代词用作表语
名词性物主代词的句法功能
连接代词what的用法
替代词ones与the ones的用法区别
other, the other, another与others的用法
some何时用于疑问句和否定句
one还是it
(a) few 与(a) little的用法区别
英语代词的用法全归纳
与反身代词连用的常用动词搭配
备考人称代词的易错点
none与no one的三点区别
高考英语对指示代词的五个考点
anything but还是anybody but
替代词it, one, that和those用法说明
人称代词的排序特点
many, much
初学者用错不定冠词的三种情形
英语语法-代词配套练习及答案
another之后可以接复数名词吗
反身代词有哪些句法功能
指示代词的几点用法说明
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