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
Throughout history man has changed his physical environment in order to improve his way of life. With the tools of technolog
Throughout history man has changed his physical environment in order to improve his way of life. With the tools of technolog
admin
2014-09-19
30
问题
Throughout history man has changed his physical environment in order to improve his way of life.
With the tools of technology he has altered many physical features of the earth. He has transformed woodlands into farmland, and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric power. Man has also modified the face of the earth by draining marshes and cutting through mountains to build roads and railways.
However, man’s changes to the physical environment have not always had beneficial results. Today, pollution of the air and water is an increasing danger to the health of the planet. Each day thousands of tons of gases come out of the exhausts of motor vehicles; smoke from factories pollutes the air of industrialized areas and the surrounding areas of countryside. The air in cities is becoming increasingly unhealthy.
The pollution of water is equally harmful. In the sea, pollution from oil is increasing and is killing enormous numbers of algae (水藻),fish and birds. The whole ecological balance of the sea is being changed. The same problem exists in rivers. Industrial wastes have already made many rivers lifeless.
Conservationists believe that it is now necessary for man to limit the growth of technology in order to survive on earth.
The ecological balance of the sea is lost when______.
选项
A、people consume more fish than they used to
B、the ecological balance of the river is lost
C、large numbers of algae, fish and birds are killed
D、the production of marine petroleum is increased
答案
C
解析
本题是一道具体细节题。问何时海洋的生态平衡就丧失了。利用查阅式阅读法,我们可以在文章第四段中找到相关信息。这段主要介绍了淡水污染给环境带来的危害。由于石油污染的增加,海中大量海藻、鱼和鸟死亡,海洋的生态平衡遭到破坏。同样的问题也存在于河流里,工业污水已使许多河流了无生机。因此,本题的正确答案应是C“当大量的海藻、鱼类和鸟类被杀死的时候”。A“人们比以前吃鱼吃得多了”,B“河流失去生态平衡”,D“海洋石油生产增加”,这三个选项都不是本题的正确答案。
转载请注明原文地址:https://kaotiyun.com/show/pmWO777K
0
在职攻硕英语联考
相关试题推荐
Webbrowsers!Interactivesoftware!There’salotofnewtechnologytalkgoingoninpublicrelationsthesedays,andit’scomin
Thedestructionofrainforestshasbeen______asadisasterfortheenvironment.
Withallthewars,fightingandsadnessintheworldtoday,it’snotonlynecessary,butalsoessentialtohaveagoodsenseof
TheMITSloanSchoolofManagementstronglybelievesthatitspurposeistogivestudentsthetoolstheywillneedtobeeffecti
Ifsustainablecompetitiveadvantagedependsonworkforceskills,Americanfirmshaveaproblem.【R6】________Skillacquisition
MoneymaynotbeflowingmuchinThailand’scapitalthesedays,butsomethingmoreunlikelyistraffic.Motoristsliketojoket
MoneymaynotbeflowingmuchinThailand’scapitalthesedays,butsomethingmoreunlikelyistraffic.Motoristsliketojoket
Foryears,Europeanshavebeenusing"smartcards"topaytheirwaythroughtheday.Theyusetheminshopsandrestaurants;plu
Foryears,Europeanshavebeenusing"smartcards"topaytheirwaythroughtheday.Theyusetheminshopsandrestaurants;plu
A、Makefriendswithseniorcitizens.B、Savesomemoneyformeals.C、Findagooddepartmenttostudy.D、Buildasupportivecommun
随机试题
在调查过程中,监察机关可以()证人等人员。
下列关于变构酶的叙述,错误的是
药物对生命质量的影响,从哪几方面评价:
可摘局部义齿按支持的形式可分为A.架支持式B.牙支持式C.基托支持式D.黏膜支持式E.混合支持式
T细胞的独特作用是结核病的病理过程特点是
肥胖型糖尿病首选治疗措施是
以下不为β-内酰胺类抗生素主要不良反应的是()。
A.维生素D400U/d,口服B.维生素D1万U/d,口服C.维生素D2每次80万u,肌内注射,每周一次,共3次D.维生素D3每次30万U,肌内注射,每隔2周1次,共3次E.维生素D10万U/d,口服治疗维生素D缺乏性佝偻病恢复期时用
如果企业一定期间内的固定性经营成本和固定性资本成本均不为零,则由上述因素共同作用而导致的杠杆效应属于()。
在心脏功能的代偿机制中,哪项不引起心排血量增加
最新回复
(
0
)