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Birds are a critical part of our ecological system. But more than ever, birds are threatened by human pollution and climate chan
Birds are a critical part of our ecological system. But more than ever, birds are threatened by human pollution and climate chan
admin
2017-02-25
62
问题
Birds are a critical part of our ecological system. But more than ever, birds are threatened by human pollution and climate change.
We need the birds to eat insects, move seeds and pollen around, transfer nutrients from sea to land, clean up after the mass death of the annual Pacific salmon runs, or when a wild animal falls anywhere in a field or forest.
How could we enjoy spring without the birds flitting busily in our garden or dropping by to check out the flowers in our urban window box? Can you
contemplate
America without the soaring bald eagle, or even those scavengers like the pigeons and gulls that clean up discarded food scraps on our city streets and waterfronts? How diminished our lives would be without
them
?
Scavenging eagles and condors need hunters to behave responsibly and bury, or remove, the remains of any shot deer peppered with fragments of lead bullets. Loons, ducks and other water birds will be poisoned by lead bullets and lead fishing sinkers if we allow such objects to drop in their feeding space.
All sea and shore birds, even the puffins and guillemots of the otherwise pristine Aleutians, need us to make sure that no other heavy metals, like mercury and cadmium, are dumped in rivers and make their way across the oceans.
Birds like the terns, knots and shearwaters that migrate between the far north and deep, deep, south of our planet need people everywhere to cease and desist from filling in their wetland fuel stops and rest stations, and from constructing golfing resorts and factories in their feeding and breeding grounds.
Seabirds are among the most endangered vertebrate species on the planet, with the International Union for Conservation of Nature classifying 97 species as globally threatened, and 17 in the highest category of critically threatened. Of greatest concern are the pelicans of the southern oceans and the spectacular, but slow-breeding albatross.
Plastic bags must be eliminated from natural environments so sea and shore birds don’t mistakenly carry such debris back to feed their chicks, with invariably lethal consequences. The albatross, cormorants and herons need us to stop over-fishing and compromising their normal food supply.
The pelicans, penguins and all the birds that inhabit, or visit, our coastlines need us to ensure that we do not dump oil into gulfs and bays, or release so much carbon dioxide into the atmosphere that the oceans turn acidic and we lose the mussels and oysters, the mass of calcareous plankton that feeds so many creatures, and the coral reefs that nurture enormous numbers of edible species.
Think about it: We share this small green planet. As they fly, feed and nest, the birds monitor the health of the natural world for us. provided that we, in turn, make the effort to access that key information.
The birds and humans are both large, complex and ultimately vulnerable organisms that inhabit the top of the food chain. At the end of the day, their fate will be our fate.
Which of the following fails to tell what birds do according to the passage?
选项
A、They help plants grow in miraculous ways.
B、They clean up the dead bodies of fish and animals.
C、They keep the oceans from being polluted and acidic.
D、They are likely to attack those irresponsible hunters.
答案
D
解析
细节题。A项“以奇妙的方式帮助植物生长”对应第二段“We need the birds to eatinsects,move seeds and pollen around,transfer nutrients from sea to land”,鸟类吃害虫,帮助植物播撒种子和传播花粉,将营养从海洋转移到陆地。B项“清理鱼类和动物的尸体”对应第二段“clean up after the mass death of the annual Pacific salmon runs,or when a wild animal falls anywhere in a field or forest”。C项“阻止海洋的污染和酸化”,相关内容出现在第二段、倒数第三段;D项“可能攻击不负责任的猎人”,相关内容出现在第四段,但两项均不能从文中推测出来。出题人的题干设置有问题,本题C、D两项理应都选。但是,在考试中,遇到此类问题,要选出与文意最不相关的一项,比较两项,D项与文意更为不符,故选D。
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