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.b

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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
The aging of cut flowers can be slowed down______.

选项

答案E

解析 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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