填空题

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

Another important way to prolong the life of cut flowers is______.

【参考答案】

F

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A. by keeping its original shape and colorB. in the life of the cut flowerC. to produce carbon dioxideD. for as long as possibleE. by controlling temperatureF. to replace the water and solution every day Another important way to prolong the life of cut flowers is______.