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31. AI means the same as
A. an image.
B. an idea.
C. anyone in the water.
D. artificial intelligence.
32. What is required of AI software to save a life?
A. It must be able to swim.
B. It must keep walking round the pool.
C. It can distinguish between a swimmer and a shadow.
D. It can save a life within a few months.
33. How does Poseidon save a life?
A. He plunges into the pool.
B. It alerts the lifeguard.
C. He cries for help.
D. it rushes to the pool.
34. Which of the following statements about Trevor Baylis is NOT true?
A. He runs.
B. He invented the clockwork radio.
C. He was once an entertainer.
D. He runs a company.
35. The word "considered" in paragraph 5 could be best replaced by
A. "thought".
B. "rated".
C. "regarded".
D. "believed".

36. Which of the following about the significance of the research on cryptic species is NOT true?
A. The results of the research can help the development of many other research areas.
B. The results of the research can help the development of biodiversity estimates.
C. The results of the research can help our understanding of infectious disease evolution.
D. The results of the research can help our understanding of "survival of the fittest".
37. What was scientists' understanding of cryptic species?
A. They occurred in equal numbers in all biogeographical regions.
B. They were mostly found in insects and reptiles.
C. They were likely to be in tropical rather than temperate regions.
D. Both B and C.
38. Do scientists know how many cryptic species exist?
A. Not yet.
B. Yes， they do.
C. They will know the answer in another one or two-years.
D. They will never know the answer.
39. Which of the following about the African bush elephant and the African elephant is true?
A. The WCU are interbreeding those elephants.
B. They are interbreeding species.
C. They are two genetically distant species.
D. They depend on each other for survival.
40. People were confused in their attempts to control malaria in Europe in the early 1900s， because scientists
A. identified only one mosquito species instead of six species.
B. thought only three mosquito species transmitted disease.
C. thought there was only one mosquito species.
D. did not know what species was being studied.

41. What problem does the authors of the new analysis raise?
A. The coal reserves are big enough.
B. All the fuel will be burnt before there is enough carbon dioxide.
C. Coal-burning could easily make up the shortfall of oil and gas reserves.
D. Oil and gas will run out so fast that Earth's doomsday will never materialize.
42. According to IPCC， what can make up the shortfall of the oil and gas reserves?
A. Fossil fuels.
B. Green fuels.
C. Coal-burning.
D. Nothing.
43. According to Anders Sivertsson，which of the following statements is ture?
A. There will be enough oil and gas if the 40 IPCC scenarios to come to pass.
B. We should cut CO2 emissions.
C. We should stop using fossil fuels.
D. The oil and gas is insufficient even if the 40 IPCC scenarios to come to pass.
44. How much is the IPCC's estimate of oil and gas reserves?
A. About 3，500 billion barrels.
B. About 8，000 billion barrels.
C. About 4，000 billion barrels.
D. About 5，000 billion barrels.
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