首页
登录
职称英语
[originaltext] The bald eagle is America’s national symbol. However, the spe
[originaltext] The bald eagle is America’s national symbol. However, the spe
游客
2023-08-22
16
管理
问题
The bald eagle is America’s national symbol. However, the species almost went extinct 30 years ago, which lead lots of people into disappointment and depression. Nowadays, it has made a comeback.
(23)In fact, the U. S. Fish and Wildlife Service is considering the possibility of taking it off the endangered-species list.
Once, more than 50,000 pairs of bald eagles nested across the country. But by 1960, that number had fallen below 400. How did it happen?
The chief killer was the widely used DDT which is a poisonous pesticide. Fish soaked up DDT, died, and were washed up on shores, where bald eagles feasted on them.
(24)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 the use of DDT, which saved the bald eagle from total wipeout. And since then, wildlife biologists have reintroduced bald eagles from Canada to America. The result was that last year U. S. birdwatchers counted as many as 11, 610 bald eagles in the country.
However, even if it were dropped from the endangered list, the bald eagle would still be a "threatened species." That means the bird would continue to get the same protection — no hunting allowed, and no disturbing of nests as before.
But bald eagles still face tough times.(25)The destruction of their natural homes could be the next DDT causing eagle numbers to drop quickly.
Questions 23 to 25 are based on the passage you have just heard.
23. What is the U. S. Fish and Wildlife Service’s consideration of bald eagles right now?
24. What harmful influence does DDT have on bald eagles?
25. According to the speaker, what may be the next DDT facing bald eagles?
选项
A、Pollution of the environment.
B、Over-killing by hunters.
C、A new generation of pesticide.
D、Destruction of their natural homes.
答案
D
解析
细节题。即使把秃鹰从濒危物种的名单删除,它们也是濒危物种。丈章最后还指出秃鹰的自然家园被破坏,这可能是他们面对的另外一个DDT,会导致秃鹰的数量快速减少。故选D。
转载请注明原文地址:https://www.tihaiku.com/zcyy/2946871.html
相关试题推荐
MillionsofAmericansareenteringtheir60sandaremoreconcernedthaneve
MillionsofAmericansareenteringtheir60sandaremoreconcernedthaneve
MillionsofAmericansareenteringtheir60sandaremoreconcernedthaneve
MillionsofAmericansareenteringtheir60sandaremoreconcernedthaneve
MillionsofAmericansareenteringtheir60sandaremoreconcernedthaneve
Americanstodaydon’tplaceaveryhighvalueonintellect.Ourheroesarea
Americanstodaydon’tplaceaveryhighvalueonintellect.Ourheroesarea
IsitanywonderthatAmericaisalsoacountryofdangerouslyoverweightpe
IsitanywonderthatAmericaisalsoacountryofdangerouslyoverweightpe
IsitanywonderthatAmericaisalsoacountryofdangerouslyoverweightpe
随机试题
活疫苗的优点是A.类似自然感染过程 B.可采取自然感染的途径进行免疫 C.以
结合水具有固体性质,能够抵抗剪切作用。()
下表列示了对某证券的未来收益率的估计,该证券期望收益率等于() 某证券
关于氯醋酸ASD萘酚酯酶,下列叙述不正确的是()A.其活性随粒细胞的成熟而增强
35kV及以下户内串联电抗器应选用(____)电抗器。(A)空心(B)干式铁
验收方法包括资料检查、()、现场检查和现场抽查。关键点见证$;$旁站见证$;$关
某旅游景点商场销售可乐,每买3瓶可凭空瓶获赠1瓶可口可乐,某旅游团购买19瓶,结
在起草绩效管理制度时应体现(),这是绩效管理的多维性带来的要求。A.明确性与具
下列药物具有安胎作用的有A.三七 B.艾叶 C.炮姜 D.苎麻根
若要追究挪用单位资金人员的刑事责任,则挪用资金的数额至少要达到( )元以上。A
最新回复
(
0
)