9. 听题干 锁定正确答案
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.
题目:What have Canadian scientists found about some seabirds?
B. They deliver pollutants from the ocean to their nesting sites.
10. 听题干 锁定正确答案
A. They migrate to the Arctic Circle during the summer.
B. They originate from Devon Island in the Arctic area.
C. They travel as far as 400 kilometers in search of food.
D. They have the ability to survive in extreme weathers.
题目:What does the speaker say about the seabirds called fulmars?
C. They travel as far as 400 kilometers in search of food.
11. 听题干 锁定正确答案
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.
题目:What did scientists previously notice about pollutants in the Arctic?
A. They were carried by the wind.
12. 听题干 锁定正确答案
A. The threats humans pose to Arctic seabirds,
B. The diminishing colonies for Arctic seabirds.
C. The harm Arctic seabirds may cause to humans.
D. The effects of the changing climate on Arctic seabirds.
题目:What does the speaker warn about at the end of the talk?
C. The harm Arctic seabirds may cause to humans.