首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Bird watchers. B、Wild-life biologists. C、Scientists. D、Governmental officers. B
A、Bird watchers. B、Wild-life biologists. C、Scientists. D、Governmental officers. B
admin
2013-09-09
43
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、Bird watchers.
B、Wild-life biologists.
C、Scientists.
D、Governmental officers.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/Od07777K
0
大学英语四级
相关试题推荐
Forthispart,youareallowed30minutestowriteacompositionentitledMyIdeaoftheInternet.Youshouldwriteatleast120
Bythetimewehurriedthroughtheheavytraffictotheairport,theplane______.
A、Helenprefersshoppingtoworking.B、Helenprefersworkingtostayinghome.C、Helenhasmuchworktodo.D、Helendislikestog
AsEnglishSpreads,IndonesiansFearforTheirLanguagePaulinaSugiarto’sthreechildrenplayedtogetheratamallherethe
Japanisgoingthroughacomplexnationalidentitycrisis.Thatmaybenobadthing,saysanewbookbyanAmericanresearcher.
Whatis______man’sabilitynowistodesignarobotthatcanrespondindependentlytoachangingworld.
Thequalityofuniversitylifeisdecliningunderstrainfromthehighereducation,leadingindependentschoolsinBritain【S1】__
A、TheUnitedStatesisfacedwithmanysocialproblems.B、VariousfactorsareresponsibleforthecrimesintheUnitedStates.C
A、Companyandcustomer.B、Repairmanandcustomer.C、Teacherandstudent’sparent.D、Wifeandhusband.A综合推断题,女士房间的暖气坏了,她想知道什么时候才
Shehadaguilty______aboutnottellingthepolicewhathadactuallyhappened.
随机试题
吸气性呼吸困难的特点是
夏季,某养鸡场雏鸡下痢,呼吸困难,口流鲜血,鸡冠和肉垂苍白;剖检见有全身性出血,内脏器官肿大,胸肌、腿肌和心包等处有针尖至粟粒大小的白色结节。该病可能是()。
对钙的吸收能力最强的是()
病例对照研究设计时最常见的偏倚是
安装轻钢龙骨纸面石膏板隔墙时,下列叙述哪项是错误的?[2010—085]
根据我国《仲裁法》的有关规定,下列各项中,符合《仲裁法》规定的有()。
房屋共用部位的养护费用应该列入()。
将甲鱼和鸡烹制成“霸王别姬”,风味独特,名扬天下,此菜为浙江名菜。()
假设一个博弈模型中,有两个参与者,一个是政府,一个是私人部门。私人部门选择的是预期的通货膨胀率,政府选择的是给定预期通货膨胀的情况下,所采取的实际通货膨胀率。并且政府不仅关心通货膨胀问题,还关心失业问题。政府的效用函数为:U=-cπ2-(y-ky
在TCP/IP网络中,主机A和主机B通过一路由器互联,提供两主机应用层之间通信的层是(248),提供机器之间通信的层是(249),具有IP层和网络接口层的设备是(250);在A与路由器和路由器与B使用不同物理网络的情况下,主机A和路由器之间传送的数据帧与路
最新回复
(
0
)