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.
内容
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Choose the correct letter from A-D and write it in boxes on your Answer Sheet. The main aim of the writer is to A: point out the economic benefits of tourism. B: outline the impact of tourism on the environment. C: introduce the concept of eco-tourism. D: explain the origins of eco-tourism.
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Questions 1-6Choose the correct letter, A, B, C or D.Write the correct letter in boxes 1-6 on your answer sheet. Which is not true about the live music（） A: The sales of concert ticket tripled in America from 1999 to 2009. B: More people are going to concerts. C: The prices of concert tickets are rising. D: The prices of concert tickets are dropin
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Questions 1-6Choose the correct letter, A, B, C or D.Write the correct letter in boxes 1-6 on your answer sheet. Which is the main cause of the decline in the sales of recorded music（） A: the disruption of internet B: the rise of illegal file-sharing and the end of the digital "replacement cycle" C: the domimance of Japanese market D: the price competition
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Questions 28-31 Choose the correct letter, A, B, C or D. Write the correct letter in boxes 28-31 on your answer sheet. The example of Beckham is to indicate that A: it is impossible for a footballer to win a Nobel prize. B: the corporation’s main contribution to society stems from what they are adept at. C: David Beckham is only adept at football. D: corporations may be adept at other things besides making profit.
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Choose the correct letter from A-D and write it in boxes on your Answer Sheet. The eco-tourist A: is often a victim of false advertising by unethical tour operators. B: accepts the restrictions that are placed on natural habitats. C: can unintentionally contribute to the negative effects of tourism. D: never goes to larger-scale tourist resorts.