维生素C又名抗坏血酸，易溶于水，易被氧化，遇热易被破坏，人体缺乏维生素C可能引发多种疾病，它的化学式是C₆H₈O₆．计算：

（1）维生素C的相对分子质量为______；

（2）维生素C中氢元素的质量分数为______（结果保留一位小数）．

—What a naughty boy he was.

—_______.

A．Down jumped he from the desk

B．From the desk jumped he down

C．He down jumped from the desk

D．Down he jumped from the desk