2. 外语
  3. Complete the summary below. Choose NO MORE THAN TWO WORDS from the passage for each answer. Write your answers in boxes 19-23 o

Complete the summary below. Choose NO MORE THAN TWO WORDS from the passage for each answer. Write your answers in boxes 19-23 o

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问题 Complete the summary below.
Choose NO MORE THAN TWO WORDS from the passage for each answer.
Write your answers in boxes 19-23 on your answer sheet.
                    Geoengineering projects
A range of geoengineering ideas has been put forward, which aim either to prevent the melting of the ice caps or to stop the general rise in global temperatures. One scheme to discourage the melting of ice and snow involves introducing【R19】______to the Arctic because of their colour. The build-up of ice could be encouraged by dispersing ice along the coasts using special ships and changing the direction of some【R20】______but this scheme is dependent on certain weather conditions. Another way of increasing the amount of ice involves using【R21】______to bring water to the surface. A scheme to stop ice moving would use【R22】______but this method is more likely to be successful in preventing the ice from travelling in one direction rather than stopping it altogether. A suggestion for cooling global temperatures is based on what has happened in the past after【R23】______and it involves creating clouds of gas.
【R19】
选项
答案birch trees
解析 Paragraph D says ’their white bark would increase the amount of reflected sunlight’ so they discourage the melting of ice and snow. Distraction: Evergreen pines also discourage the melting of ice and snow but not because of their colour.
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