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
2023-08-17
50
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 can be used to deliver messages in times of emergency.
B、They deliver pollutants from the ocean to their nesting sites.
C、They carry plant seeds and spread them to faraway places.
D、They are on the verge of extinction because of pollution.
答案
B
解析
短文开头提到,鸟类以传送物品而闻名,而加拿大科学家发现了一个令人担忧的说明鸟类具有散播物品能力的新例子。在加拿大极地的北部,海鸟们捡起海水中的危险化学品,带回到它们的栖息地附近的池塘中,故答案为B)。
转载请注明原文地址:https://tihaiku.com/zcyy/2932651.html
相关试题推荐
[originaltext](12)Youngwomenarelosingfaithintheuniversitysystemwi
[originaltext]IndependenceDayisthenationalholidayoftheUnitedStates
[originaltext]W:Well,Mr.Smith,I’velookedintoyourinvoiceandfoundoutw
[originaltext]W:Well,Mr.Smith,I’velookedintoyourinvoiceandfoundoutw
[originaltext]W:Well,Mr.Smith,I’velookedintoyourinvoiceandfoundoutw
[originaltext](23)Engaginginregularexerciseimprovesyouroverallhealt
[originaltext]Goodmorning.Welcometotoday’slecture.Today,wewillfocu
[originaltext]Goodmorning.Welcometotoday’slecture.Today,wewillfocu
[originaltext]Goodmorning.Welcometotoday’slecture.Today,wewillfocu
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreatple
随机试题
[originaltext]W:Hello,Mr.Harrison,thanksforcalling.Now,whenwoulditbe
Ricci’s"OperationColumbus"Ricci,45,isnowstri
讲故事《福气糕》
土地登记代理机构在收集土地登记相关资料时可借助的基本途径包括( )。A.文字资
在项目管理中,采取()方法,对项目进度计划实施进行全过程监督和控制是经济和合理
证券市场供给的决定因素有( ) Ⅰ.上市公司质量 Ⅱ.上市公司数量 Ⅲ.
统计行政处罚的种类有()。A.警告、罚款、吊销营业执照 B.警告、
下列专项规划在草案上报审批前提出环境影响报告书的是( )。A.设区的市级以上流
验收批的质量检验应由()组织进行。A.监理工程师 B.施工单位负责人 C.
在工程网络计划中,关键工作是()的工作。A.总时差最小 B.关键线路上 C
最新回复
(
0
)