首页
登录
职称英语
Ecology is the science of how living creatures and plants exist together and
Ecology is the science of how living creatures and plants exist together and
游客
2024-01-14
8
管理
问题
Ecology is the science of how living creatures and plants exist together and depend on each other and on the local environment. Where an environment is undisturbed, the ecology of an area is【C1】________ balance, but if a creature is exterminated (灭绝) or an alien (异类) species【C2】________, then the balance of nature will be【C3】________.
Man is a part of the【C4】________and has done more to upset the ecology during【C5】________short span on earth than【C6】________other living creature. He has done this by his ignorance, his【C7】________, his thoughtless foolishness and his uncontrolled wastefulness. He has poisoned the【C8】________and polluted both land and water. He has wasted the earth’s natural resources with no【C9】________for the future, and has thought out the most devastating ways of killing his fellow men and every other sort of life at the same time.
Since man has done so much【C10】________, it is【C11】________to man to try to put matters right—if it is not already too【C12】________.If there is to be any remedy for our ills, that remedy ultimately lies in the hands of the【C13】________, and the sooner they start doing something about it, the【C14】________.
One of the main【C15】________of the earth’s troubles is that the world is overpopulated and that this overpopulation is growing【C16】________an ever-increasing rate. At the same time we are【C17】________up our natural resources—fuels and mineral ores—at an ever-increasing speed with no hope of replacing them. For many years the earth has been unable to【C18】________enough food for these rapidly expanding populations and the position is steadily deteriorating【C19】________the fertility of some of our richest soils has been lost and vast areas that were【C20】________fertile lands have turned into barren deserts. [br] 【C2】
选项
A、discovered
B、introduced
C、brought
答案
B
解析
本句是说有两种情况会导致生态失衡:一种是某一动物的灭绝,另一种情况是异类侵入,introduce意为“引入,进入”,符合语境,故选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3360909.html
相关试题推荐
Although______happenedinthedevelopedcountrysoundslikesciencefiction,i
______inarecentsciencecompetition,thethreestudentswereawardedscholars
Although______happenedinthatdevelopedcountrysoundslikesciencefiction,i
LivinginthecentralAmericandeserthasitsproblems,______obtainingwateris
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincl
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincl
AftersixmonthsoflivinginNewZealand,Irealizedonething.Despitemy【C
AftersixmonthsoflivinginNewZealand,Irealizedonething.Despitemy【C
AftersixmonthsoflivinginNewZealand,Irealizedonething.Despitemy【C
AftersixmonthsoflivinginNewZealand,Irealizedonething.Despitemy【C
随机试题
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hi,Prof.Webster
FlorenceNightingaleenteredthehospitalandwasappalledandhorrifiedby
[originaltext]Formostpeople,readinganewspaperhasbecomeahabitpasse
一火箭的固有长度为L,相对于地面作匀速直线运动的速度为,火箭上有一个人从火箭的后
下列哪个不用于表面麻醉的药物是A.丁卡因 B.普鲁卡因 C.苯妥英钠
药物化学所研究的内容涉及A.在原子水平上解释药物的作用机理 B.在组织水平上解
女,16岁,于高处取物时不慎摔下,呈骑跨式。伤及外阴部位,疼痛难忍,出现外阴血肿
材料一:党的十九大报告指出,改革开放之初,我们党发出走自己的路,建设中国特色社会
在建设项目经济费用效益分析中,可以直接用作影子价格的有() A.不可再生自然
背景 某施工单位承建了一巷道工程,巷道断面20m2,倾角6。,围岩为中等稳定的
最新回复
(
0
)