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
32
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://jikaoti.com/ti/fgEsFFFM
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
Whatarethespeakerstalkingabout?
Whatarethespeakersdoing?
WhendopeoplemostprobablywearT-shirts,accordingtothespeaker?
WhoisSmithspeakingto?
WhyareLondontaxidriversefficient?
WhyareLondontaxidriversefficient?
Whatcanbeinferredaboutthewomanwho’sspeaking?
Whatdoesthewomansuggestthemando?
随机试题
正确的字符型常量是()
出盒时水温降至多少时最适宜
属于血小板功能异常所致紫癜的是
男,25岁。反复上腹痛、反酸4年。胃镜检查示十二指肠球部溃疡,尿素酶试验阳性,治疗方案首选抑酸剂加()
A.山栀大黄B.白术黄芩C.青黛诃子D.蒲黄当归E.枳壳荆芥
女性,36岁,1年来乏力、易疲倦、腰部不适,有时下肢浮肿,未检查。2个月来加重,伴纳差,血压增高为150/100mmHg,下肢轻度浮肿。尿蛋白(+),沉渣RBC5~10个/Hp,偶见颗粒管型,血化验Hb90g/L,血肌酐400μmol/L。最可能的诊断
增强基牙与修复体抗力形的措施包括()。
资料1天津××集装箱有限公司(海关注册编号312223××××)进口一批油漆(HSCODE:32100000,该货物法定计量单位为千克)作为履行进料加工合同的料件,货物于06.03.26进口,3月30日该企业报关员持编号为C221083009
旅行社应当按年度将()等统计资料,在次年4月15日前,报送旅游行政管理部门。
中国古代将天干和地支按照一定的规则搭配,用以记录时间。下列选项中的()属于天干的内容。
最新回复
(
0
)