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为什么纺锤树可以提供自来shui?

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为什么纺锤树可以提供自来水?

纺锤树生长在南mei的ba西高原,因树形酷似纺锤而得名。它一般高30米左右,腰围却有15-16米,由中腰向两tou逐渐变细变尖。远远望去,仿佛一个个大纺锤cha在地里。ba西高原雨季短而旱季较长,纺锤树适应这样的生活环境,gen系特别发达,雨季一到,它的gen就拼命xi收水分,贮存在大纺锤里。据说,一棵大树可以贮水两吨多。同时,纺锤树ding上开始滋生稀疏的枝条,长chu心形的叶片。时季来临,绿叶凋零,枝tou绽chu朵朵红hua,纺锤树又成了cha着hua束的大hua瓶,所以当地人又称它zuohua瓶树。纺锤树和仙人掌一样,是沙漠上旅行者的甘泉。人们口渴时,在树上挖个小孔,就可以饮到清凉的"自来水"。

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