首页
登录
职称英语
[originaltext] Birds are famous for carrying things around. Some, like homin
[originaltext] Birds are famous for carrying things around. Some, like homin
游客
2024-04-10
16
管理
问题
Birds are famous for carrying things around. Some, like homing pigeons, can be trained to deliver messages and packages. Other birds unknowingly carry seeds that cling to them for the ride.(9)Canadian scientists have found a worrisome, new example of the power that birds have to spread stuff around. Way up north in the Canadian Arctic, seabirds are picking up dangerous chemicals in the ocean and delivering them to ponds near where the birds live.
Some 10,000 pairs of the birds, called fulmars, a kind of Arctic seabird, make their nests on Devon Island, north of the Arctic Circle.(10)The fulmars travel some 400 kilometers over the sea to find food. When they return home, their droppings end up all around their nesting sites, including in nearby ponds.
(11)Previously, scientists noticed pollutants arriving in the Arctic with the wind. Salmon also carry dangerous chemicals as the fish migrate between rivers and the sea. The bodies of fish and other meat-eaters can build up high levels of the chemicals.
To test the polluting power of fulmars, researchers collected samples of deposit from 11 ponds on Devon Island. In ponds closest to the colony, the results showed there were far more pollutants than in ponds less affected by the birds. The pollutants in the ponds appear to come from fish that fulmars eat when they’re out on the ocean.(12)People who live, hunt, or fish near bird colonies need to be careful, the researchers say. The birds don’t mean to cause harm, but the chemicals they carry can cause major problems.
Questions 9 to 12 are based on the passage you have just heard.
9. What have Canadian scientists found about some seabirds?
10. What does the speaker say about the seabirds called fulmars?
11. What did scientists previously notice about pollutants in the Arctic?
12. What does the speaker warn about at the end of the talk?
选项
A、They were carried by the wind.
B、They had become more poisonous.
C、They were less than on the continent.
D、They poisoned some of the fulmars.
答案
A
解析
短文中提到,以前科学家们就注意到,风可以将污染物带至北极,故答案为A)。
转载请注明原文地址:https://tihaiku.com/zcyy/3548913.html
相关试题推荐
[originaltext]Ifyou’recarefulenough,you’llfindthatitiscommonnowad
[originaltext]InBritainthebiggestnumberofworkingforeignerscomesfro
[originaltext]InBritainthebiggestnumberofworkingforeignerscomesfro
[originaltext]InBritainthebiggestnumberofworkingforeignerscomesfro
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihave
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihave
随机试题
(1)ConsideringhowjazzistranscribedinChinese(jueshi),youmaybemisled
栓子的最确切定义是()。A.阻塞血管的异常物质 B.阻塞血管的固态物质
雨天避免“水滑”现象的有效方法就是保持高速行驶。()
利用直接插入排序法的思想建立一个有序线性表的时间复杂度为()。
醋炙法中醋的用量最多不超过()。A.100:10B.100:20C.100:3
下列关于原发性血小板减少性紫癜的描述,正确的是A.出血时间正常但血小板寿命缩短B
甲市乙县公安局依法对违法嫌疑人李某作出罚款的处罚决定,办案民警制作《行政处罚决定
(2020年真题)乙借用有资质的丙建设施工企业的名义与甲签订建设工程施工合同,未
共用题干 A公司将M地块的使用权抵押给B公司,于9月20日签订抵押合同,并于次
血制品的采取应A.献血者的需求 B.国家规定标准 C.医院规定 D.血站规
最新回复
(
0
)