首页
登录
职称英语
Throughout history man has changed his physical environment in order to improve
Throughout history man has changed his physical environment in order to improve
游客
2024-03-03
8
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 make lakes and reservoirs out of rivers for irrigation purposes or hydroelectric (水力发电的)power. Man has also modified the face of the earth by draining marshes(沼泽) and cutting through mountains to build roads and railways.
However, man’s changes to the physical environment haven’t 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. [br] 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 changed
C、the production of marine petroleum is increased
D、large numbers of algae, fish and birds are killed
答案
D
解析
第二段第6,7句说“海洋里,油造成了污染,毒死了大量的水藻、鱼和鸟,这样整个海洋的生态平衡就改变了”根据题干的意思,答案应表明在什么环境下海洋生态失去平衡。选项B)容易造成干扰,但只要注意到选项B)中的changed是个中性词,就不会选错
转载请注明原文地址:https://tihaiku.com/zcyy/3500807.html
相关试题推荐
Accordingtothepassage,whatkindofenvironmentalproblemwillsandstormsbri
Thepassagegivesanoverviewofhurricanesandtheirhistory.[br]A______is
Thepassagegivesanoverviewofhurricanesandtheirhistory.[br]Windspeeds
Thepassagegivesanoverviewofhurricanesandtheirhistory.[br]HurricaneMi
Thepassagegivesanoverviewofhurricanesandtheirhistory.[br]Therewilln
Thepassagegivesanoverviewofhurricanesandtheirhistory.[br]Mosttropica
Thepassagegivesanoverviewofhurricanesandtheirhistory.[br]Hurricanesi
[originaltext]ThehistoryofValentine’sDayisobscure,andfurthercloude
【B1】[br]【B3】[audioFiles]audio_eufm_j62_007(20082)[/audioFiles]improved
[originaltext]Atruefriendshipcarriesalonghistoryofexperiencethatd
随机试题
[originaltext]LastApril,AmericanbusinessmanDennisTitoreportedlypaid
Accordingtothepassage,thebooktheChrysanthemumandtheSworddescribes___
ShouldPetsBeForbiddeninDormitory?1.现在很多大学生在寝室里养宠物2.有人赞成,也有人反对
A
关于药物制成混悬剂的条件的不正确表述是()。A:难溶性药物需制成液体制剂供临床
胸片X线可见两肺大小、密度、分布都均匀一致的粟粒状阴影,正常肺纹理显示不清,应考
下列备选答案中正确的是()A.IgG各亚类分子与相应抗原结合后均可经经典途径激
( )是房地产经纪机构必不可少的重要资源,是其生存和发展的基础。A.客源 B
共用题干 被告人王某故意杀人案经某市中级法院审理,认为案件事实清楚,证据确实、
某预测点与直径3m的风机相距20m,风机噪声声功率为90dB(A)。假设风机位于
最新回复
(
0
)