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
66
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:http://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
[img]2012q2/ct_epem_epelist_0080_20123[/img][br][originaltext]Iwashavingmy
[originaltext]AlbertSchweitzerwasbornin1875inAlsace.Atthattime,i
Hisundoubtedlyaggressivebehavioronlyservedtofurtherendearhimtoallwho
TheMuseumofChildhoodThereare4,000toysinLon
WhatdidresearchersatHarvardfindinthestudy?[br][originaltext]Inthiss
Thebook(give)______tohimisanovelwrittenbyThomasHardy.given本题考查作后置定语的过去
闽菜以()风味为代表。A.闽东 B.闽南 C.闽西 D.闽北 E.闽中
在检验人员做出产品放行、交付的判定前,需要()。[2OlO年真题] A
治疗腹痛,宜首选( )。A.章门、中脘、脾俞 B.三阴交、中脘、天枢 C.
上海证券交易所个股期权合约的合约标的是()。A.大盘蓝筹 B.创业板 C.
最新回复
(
0
)