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.
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.
举一反三
- Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. In paragraph B, the author intends to A: show Antarctica has been a central topic of global warming discussion in Mass media. B: illustrate how its huge sea ice brings food to millions of lives in the world. C: emphasise the significance of Antarctica to the global climate and ocean currents. D: illustrate the geographical location of Antarctica as the central spot on Earth.
- Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. What factor drives Antarctic water to move beyond the continental shelf A: The increase of salt and density of the water B: The decrease of salt and density of the water C: The rising temperature due to global warming D: The melting of fresh ice into the ocean
- Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. What is the final effect of the katabatic winds A: Increasing the moving speed of ocean current B: Increasing the salt level near ocean surface C: Bringing fresh ice into the oceans D: Piling up the mountainous ice cap respected by mariners
- Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. Why should Australian formers keep an eye on the Antarctic ocean temperature A: It can help farmers reduce their economic loss. B: It allows for recovery of grassland lost to overgrazing. C: It can help to prevent animals from dying D: It enables astronauts to have a clear view of the Antarctic continent.
- Questions 1-6Choose the correct letter, A, B, C or D.Write the correct letter in boxes 1-6 on your answer sheet. Lady Gaga’s "Monster Ball" concert（） A: is a failure because of the theme. B: is dangerous and violent. C: features a rock and roll style. D: is very successful.