首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Water problems in the future will become more intense and more complex. Our increasing population will tremendously increase urb
Water problems in the future will become more intense and more complex. Our increasing population will tremendously increase urb
admin
2011-02-28
47
问题
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 larger volumes of liquid .wastes, and many of these will contain chemicals which are noxious. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever-increasing quantities of agricultural 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 dwindled. 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, tn permit the reuse of the water or minimize 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 products into marketable by products. Other industries are exploring potential economic uses for their waste products.
The reader can conclude that______.
选项
A、countries of the world will work together on pollution problems
B、some industries are now making economic use of liquid wastes
C、by-products from wastes lead to a more prosperous marketplace
D、science is making great progress in increasing water supplies
答案
B
解析
第三段最后两句均阐述某些正在从经济上利用废水。
转载请注明原文地址:https://kaotiyun.com/show/Mutd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
FutureShock
Threecommonwaysofrememberingare:repetition,association,andexaggeration.Repetitionisthekeytolongtermmemory.【
Threecommonwaysofrememberingare:repetition,association,andexaggeration.Repetitionisthekeytolongtermmemory.【
Geneticallyengineeredcropsaresafeforhumansandanimalstoeatandhavenotcausedincreasesincancer,obesity,gastrointe
Geneticallyengineeredcropsaresafeforhumansandanimalstoeatandhavenotcausedincreasesincancer,obesity,gastrointe
Geneticallyengineeredcropsaresafeforhumansandanimalstoeatandhavenotcausedincreasesincancer,obesity,gastrointe
U.S.healthofficialsareincreasingsurveillancemeasuresatdoctors’officesandinternationalborderstoguardagainstthes
U.S.healthofficialsareincreasingsurveillancemeasuresatdoctors’officesandinternationalborderstoguardagainstthes
随机试题
人在成年以后的社会化,被称为【】
生命周期法的各个阶段包括
一个完整的计算机系统应包括_______。
下列不属于广义教育制度范畴的是()
患者素有眩晕,性情急躁,时见肢端和面颊发麻,喜食肥甘,嗜烟酒,近两年来症状明显加重,就诊前与人口角,眩晕随之加剧,继而昏仆倒地,不省人事,牙关紧闭,面赤无汗,双手固握,舌淡,苔白腻,脉弦滑而数。诊断为( )。
陈某和其妻子经常争吵,但是其妻子又不愿意与其离婚,陈某遂萌生往其妻子饭里下毒杀害其妻的念头,但是又不忍心杀害自己的儿子。所以陈某将儿子送到相隔300里的父母家。并嘱咐儿子千万不要回家。陈某回家后在饭菜里下了毒就出去了。其儿子不愿意在奶奶家呆,遂偷偷跑回家。
[2016年第58题]5kg质量块振动,其自由振动规律x=xsinωnt,如果振动的圆频率为30rad/s,则此系统的刚度系数为()。
竣工决算财务报表之间的逻辑关系是()。
工艺准备的质量控制通常包括哪些内容()
吸收社会闲散资金,可以“变小钱为大钱,变死钱为活钱”,有利于国家现代化建设。我国目前最大限度地吸收社会闲散资金的形式是()。
最新回复
(
0
)