【简答题】湛江廉江盛产红橙,有“中国红橙之乡”之美誉.如右下图:红橙的营养丰富,其果汁中含全糖11.3%,柠檬酸0.85%,维生素C≥30mg/100g.请回答: (1)糖类属于______(填“有机物”或“无机物”). (2)已知维生素C的化学式为C 6 H 8 O 6 ,则维生素C由______种元素组成,其中C、H、O元素的质量比为:______;小明每天喝一杯(200g)橙汁,则他最少可补充维生素C...
【简答题】阅读理解。 Years ago, if a person had some problems in his life, he might go home and write in his diary. Now he might go onto the Internet and write about them in a blog (博客). Differences between a blog a...