A. decrease B. liquid C. are used
Phrases:
A. The first relates to the treatment of wastes to【T7】 1their pollution hazard
B. Effluents from sewage disposal plants【T8】 2in some areas
C. "prior to" disposal and the treatment of【T9】 3wastes
There are two ways by which the pollution problem can be dwindled.【T10】 4This involves the processing of solid wastes【T11】 5, or effluents, to permit the reuse of the water or minimize pollution upon final disposal.
A second approach is to develop an economical use for all or a part of the wastes. Farm manure is spread in fields as a nutrient or organic supplement.【T12】 6both for irrigation and for the nutrients contained. 【T7】
  • 1、
  • 2、
  • 3、
  • 4、
  • 5、
  • 6、
【正确答案】 1、A,    2、C,    3、B,    4、A,    5、C,    6、B    
【答案解析】这一句的上一句讲“农场的肥料被撒到农田里作为营养物和有机肥料使用”，紧接着自然要说液体废料的处理用途了。本句的意思是：“废水厂处理后的流出物就被用于灌溉农田或用作其他营养物。”故选B。