2. 外语
  3. A. by keeping its original shape and color B. in the life of the cut flower C. to produce carbon dioxide D. for as long as possi

A. by keeping its original shape and color B. in the life of the cut flower C. to produce carbon dioxide D. for as long as possi

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问题 A. by keeping its original shape and color
B. in the life of the cut flower
C. to produce carbon dioxide
D. for as long as possible
E. by controlling temperature
F. to replace the water and solution every day
The ageing of cut flowers can be slowed down______.
选项
答案E
解析 本题考查的是对阐述文章的主旨事实与细节的了解。本题的答案可以在第四段的最后一句中找到，把选项E填入空格中，该题几乎是第四段的最后一句的完整重现，故选E。
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