题目内容
(请给出正确答案)
[主观题]
A few simple facts will help you keep cut flowers___________ A.by keeping its
A few simple facts will help you keep cut flowers___________
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
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