Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. The decrease in the number of whales and seabirds is due to A: killer whales’ activity around Antarctica. B: the correlation between sea birds’ migration and the salinity level of the ocean. C: the lower productivity of food source resulting from less sea ice. D: the failure of seals to produce babies.
Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. The decrease in the number of whales and seabirds is due to A: killer whales’ activity around Antarctica. B: the correlation between sea birds’ migration and the salinity level of the ocean. C: the lower productivity of food source resulting from less sea ice. D: the failure of seals to produce babies.
Directions: Each sentence has a word or phrase underlined. There are four words or phrase beneath each sentence. Choose the one word or phrase which would best keep the meaning of the original sentence if it were substituted for the underlined part. （每题10分，共10题） 1. 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.(CET6-2016.12)
Directions: Each sentence has a word or phrase underlined. There are four words or phrase beneath each sentence. Choose the one word or phrase which would best keep the meaning of the original sentence if it were substituted for the underlined part. （每题10分，共10题） 1. 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.(CET6-2016.12)