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
Respiration plays a key role ______.

选项

答案B

解析文章的第三段就是讲呼吸对切花寿命的影响，所以应该选择B。

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本试题收录于：职称英语综合类A级题库职称英语分类

职称英语综合类A级

职称英语

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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.

职称英语综合类A级

职称英语

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EarlyUnitedStatesReinterpretedbyBernardBailynBernardBailynhasrecentlyreinterpretedtheearlyhistoryoftheUnite

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PlantsinDesertOnlyspecialplantscansurvivetheterribleclimateofadesert,fortheseareregionswheretheannualra

FewFactsaboutSingapore1.SingaporeisanindependentcitystateinsoutheasternAsia,consistingofonemajorisland—the

CellPhoneLetsYourSecretsOutYourcellphoneholdssecretsaboutyou.Besidesthenamesandnumbersthatyou’veprogram

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