A. Control of Respiration B. Beauty of Fresh Cut Flowers C. Role of Respiration D. Most Important Aspect of Flower Care E. N

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问题 A. Control of Respiration
B. Beauty of Fresh Cut Flowers
C. Role of Respiration
D. Most Important Aspect of Flower Care
E. Need for Clean Water
F. Ways of Stopping Respiration  
A. by keeping its original shape and colour
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

选项

答案D

解析
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