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

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

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问题 A．by keeping its original shape and color
B．in the life of cut flowers
C．to produce carbon dioxide
D．for as long as possible
E. by controlling temperature
F. to replace the water and solution every day
Another important way to prolong the life of cut flowers is ______.
选项
答案F
解析 文章最后一段的第一句话，提到了保护切花寿命的另一种方法就是保证给予无污染的水。所以应该选择F。
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