首页
登录
职称英语
[originaltext] America’s national symbol, the bald eagle, almost went extinc
[originaltext] America’s national symbol, the bald eagle, almost went extinc
游客
2023-07-10
34
管理
问题
America’s national symbol, the bald eagle, almost went extinct twenty years ago,(7)but it has made a comeback. In fact, the US Fish and Wild Life Service is considering the possibility of taking it off the Endangered Species List. Once, more than fifty thousand pairs of bald eagles nested across the country, but by 1960 that number had fallen below four hundred. The chief killer was the widely used DDT. Fish soaked up DDT, died, and were washed up on the shores, where bald eagles feasted on them.(8)DDT prevented eagle eggshells from thickening. The shells became so thin that they shattered before the babies hatched. Fortunately, in 1972, a law was passed to ban DDT, which saved the bald eagle from total wipeout. And since then,(9)wild-life biologists have reintroduced bald eagles from Canada to America. The result was that last year, US bird watchers counted 11,610 bald eagles in the country. If it were dropped from the Endangered Species List, the bald eagle would still be a threatened species. That means the bird would continue to get the same protection.(10)No hunting allowed, and no disturbing of nests. But bald eagles still face tough times. The destruction of their natural homes could be the next DDT, causing eagle numbers to drop quickly.
选项
A、DDT made bald eagles have no fish to eat.
B、DDT poisoned the water.
C、DDT killed bald eagles directly.
D、DDT stopped eagle eggshells from hatching babies.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2824078.html
相关试题推荐
WhatdoNationalSemiconductor,MaxwellHouseCoffee,Deloitte&Touche,and
WhatdoNationalSemiconductor,MaxwellHouseCoffee,Deloitte&Touche,and
WhatdoNationalSemiconductor,MaxwellHouseCoffee,Deloitte&Touche,and
WhatdoNationalSemiconductor,MaxwellHouseCoffee,Deloitte&Touche,and
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]W:Goodmorning.I’dliketoasksomequestionsaboutyourinsura
[originaltext]W:Goodmorning.I’dliketoasksomequestionsaboutyourinsura
随机试题
起源于举世闻名的道家哲学的道教是中国的本土宗教,建立于东汉时期(公元24~220年),已有1800多年的历史。在封建社会时期,和佛教一样,道教对中国的
由于旅游计划的变更造成旅游团在某地的游览时间延长时,( )应及时将旅游计划被迫
通过对实际经营结果与预算的差异分析,企业可以加强对()结果的掌握。A.预算编制
以下对拱的内力特点的论述,()完全正确。Ⅰ.满跨竖向均布荷载作用下,三铰拱的
计算发病率时,分数之分子为一定时期内某人群某病的A.所有病例数 B.旧病例数
体育文化包括__________、__________和体育制度文化。()A.
共用题干 第二篇 Diabetes(糖尿病)andEyeDamageOve
30,15,1002,57,()A.59 B.58 C.69 D.
(2017年真题)甲房地产开发企业开发一住宅项目,实际占地面积12000平方米,
某厂有151行车2台,简易升降机1台,叉车1辆,货运电梯2部,另有锻造机、数控机
最新回复
(
0
)