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【简答题】
维生素C(化学式为C 6 H 8 O 6 )对人体皮肤和牙龈的健康有重要作用，缺乏维生素C会引起坏血病。经研究表明，青少年每天都需要摄入60mg的维生素C，若其中的12mg由水果补充。请计算回答： (1)维生素C中碳、氢、氧三种元素的质量比是 ； (2)若食用的水果以苹果计，已知每100 g苹果中含维生素C的质量为4 mg，那么每天需吃苹果的质量是 g。
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