Please Listen to the following TED talk and answer the questions followed.(2分17秒-3分08秒）The speaker worked with other scientists to analyze earth climate observations. In 1981,they?published an article in Science magazine?concluding?that A.observed warming?of 0.4 degrees Celsius?in the prior century?was consistent with the greenhouse effect?of increasing CO2 B.The 21st century?would see shifting climate zones,?creation of drought-prone regions?in North America and Asia,?erosion of ice sheets, rising sea levels?and opening of the fabled Northwest Passage C.All of these impacts?have since either happened?or are now well under way D.That Earth would likely warm in the 1980’s,?and warming would exceed?the noise level of random weather?by the end of the century

Please Listen to the following TED talk and answer the questions followed.(2分17秒-3分08秒）The speaker worked with other scientists to analyze earth climate observations. In 1981,they?published an article in Science magazine?concluding?that A.observed warming?of 0.4 degrees Celsius?in the prior century?was consistent with the greenhouse effect?of increasing CO2 B.The 21st century?would see shifting climate zones,?creation of drought-prone regions?in North America and Asia,?erosion of ice sheets, rising sea levels?and opening of the fabled Northwest Passage C.All of these impacts?have since either happened?or are now well under way D.That Earth would likely warm in the 1980’s,?and warming would exceed?the noise level of random weather?by the end of the century

正确答案：C