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
America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodi
America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodi
admin
2021-12-26
49
问题
America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodity and must be conserved. In the damp East, an excess of water led to complacency until two factors created concern over our water supply. First, the periods of drought from 1961 to 1966 in the Northeast affected crop production and used up the surface and ground water supplies. Second, attention was called to rapid increases in the rates of pollution of these waters resulting from increased urban and industrial growth. As a result, there is an increasing awareness of the need for conserving the quantity and quality of our nation’s water supplies.
Water is a renewable resource, but it is not exhaustible. When used for municipal, industrial, or agricultural purposes, it is not destroyed, but generally finds its way back into our water supply. This used water now carries some waste materials. These dirty waters are often dumped into large bodies of water or are disposed of on land. In the latter instance, evaporation concentrates some of the wastes on the soil surface. On the other hand, water moving through the soil will eventually carry some of the wastes down into the ground water supplies. Eventually, all water evaporates and later returns to the earth as rain or snow in a relatively purer state.
Through this never-ending cycle, there is just as much water in this country now as there ever was. The amount, however, does not increase. Our rapid population growth and our agricultural and industrial expansion have caused our water needs to soar. By withdrawing water from streams too quickly, we have in some instances upset the balance of nature’s built-in renewal processes for conserving water. As a result, some of our streams and lakes have become "wet deserts. " There is still plenty of water in them, but its water is so polluted that it supports almost no life at all.
Water is relatively purer in________.
选项
A、fast moving streams and rivers
B、underground water supplies
C、mountainous areas
D、rain and snow
答案
D
解析
细节题。根据文章第二段最后一句“Eventually,all water evaporates and later returns to the earth as rain or snow in a relatively purer state.”可知最终所有的水蒸发,然后以降雨或降雪等相对较纯净的形式回到地球,故选D。
转载请注明原文地址:https://kaotiyun.com/show/RmNd777K
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
Whatistherelationshipofthetwopeople?
Oneoftheadvantagesoftakingnotesisthatitforcesyoutopaycloserattentiontotheclasslecture.Ifyoulisten【C1】_____
WhendopeoplemostprobablywearT-shirts,accordingtothespeaker?
Blocksof"high-rise"flatshavebeenbuiltinlargenumbersinLondonandinmanyotherbigcities.JustaftertheSecondWorld
WhoisSmithspeakingto?
WhoisSmithspeakingto?
InBritain,winteristheseasonnotonlyforvisitstothetheatre,opera,concertsandballet,butalsoforshoppingorforsi
InBritain,winteristheseasonnotonlyforvisitstothetheatre,opera,concertsandballet,butalsoforshoppingorforsi
Whatdoesthewomansuggestthemando?
随机试题
(2019年省属)下列关于惩罚与负强化关系的描述,正确的有()
炙甘草汤与生脉散均具有的治疗作用是
低钾血症补钾的原则之一是尿量至少须大于
药物与香草醛反应,产生黄色结晶,其熔点为228~231℃,该药物是( )。
讲授法是中学教学的常用教学方法,讲授的语言要有条理性和简练性。()
隐士,历来算是一个美名,但有时也当作一个____。最显著的,则有刺陈眉公的“翩然一只云中鹤,飞去飞来宰相衙”的诗,至今还有人提及。非隐士的心目中的隐士,是____、息影山林的人物。但这种人物,世间是不会知道的。依次填人划横线部分最恰当的一项是()。
甲、乙签订买卖合同,约定甲先交货,乙后付款。履行期届至,甲要求乙先付款,乙拒绝,乙行使的权利是()。
“十一”期间某游乐场推出儿童免门票的活动,成人和儿童人园数量都比“十一”前翻一番,入园总人数达到3000人,门票收入则增加了六成。已知成人票每张200元,儿童票每张100元,则“十一”期间门票收入为多少?
A、 B、 C、 D、 A
设AX=A+2X,其中A=,求X.
最新回复
(
0
)