首页
登录
职称英语
[originaltext] Throughout history man has changed his physical environment in
[originaltext] Throughout history man has changed his physical environment in
游客
2023-09-15
15
管理
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 wood lands 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 ( a very simple plant without stems or leaves that grows in or near water), 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.
选项
A、When the ecological balance of the river is lost.
B、When people consume more fish than they used to.
C、When large numbers of algae, fish and birds are killed.
D、When the production of marine petroleum is increased.
答案
C
解析
When is the ecological balance of the sea lost?
选项均提到了海洋生物,表明问题与此有关。短文最后提到,当海水被污染,大批海洋生物死去,海洋的生态平衡也就被破坏了,故答案为[C]。
转载请注明原文地址:https://tihaiku.com/zcyy/3017448.html
相关试题推荐
[originaltext]M:Howdidyoulikethefireworkslastnight?W:Ireallydidn’t
[originaltext]W:Pardonme,officer!M:Yes?W:WearelookingfortheShanghai
[originaltext]W:Pardonme,officer!M:Yes?W:WearelookingfortheShanghai
[originaltext]W:Theshirtsellsfor3dollarseach,butit’s5ifyoubuytwo.
[originaltext]W:Theshirtsellsfor3dollarseach,butit’s5ifyoubuytwo.
[originaltext]W:Theshirtsellsfor3dollarseach,butit’s5ifyoubuytwo.
[originaltext]W:WhatcanIdoforyou?M:Yes,Iwouldlikesometicketsforn
[originaltext]W:WhatcanIdoforyou?M:Yes,Iwouldlikesometicketsforn
[originaltext]M:MayIhelpyou?W:Yes,myfriendisfinishingmiddlehighsch
[originaltext]W:Gotobedearlyandgetsomerest,Jack.M:ButIhavetostu
随机试题
Theprocessofperceivingotherpeopleisrarelytranslatedintocold,objec
[originaltext]M:I’vebeenworkingreallyhardinthepastsemesterandIgota
Amealcontainingfishandvegetablesisconsidereda(health)______one.healthy由
对买入套期保值而言,基差走强,套期保值效果是()。(不计手续费等费用)A、期货市场和现货市场不能完全盈亏相抵,存在净亏损B、期货市场和现货市场能完全盈
A.3 B.4 C.5 D.6
白鹭 郭沫若 白鹭是一首精巧的诗。 色素的配合,身段的大小,一切都很适宜。
患者,男性,33岁。高血压病史10年,伴有直立性低血压。近来常觉头痛、心悸、多汗
关于资本经营型集团总部,下列说正确的有()A.是一个“资金中心” B.具有
流动性危机情景的分类不包括()。A.单个银行危机情景 B.多个银行危机情景
水利工程土石围堰漏洞险情进水口的探测方法有( )等。A.水面观察 B.潜水探漏
最新回复
(
0
)