原料的煅烧以下哪种成分会减少()。A、水份 B、灰份 C、真密度 D、粉末比电阻 发布时间:2018-03-08 15:16 │ 来源:www.tikuol.com 题型:单项选择题 问题: 原料的煅烧以下哪种成分会减少()。A、水份B、灰份C、真密度D、粉末比电阻
题型:单项选择题 Older people need the same amount of vitamins as younger people although they need fewer calories, ______ ? [ ]A. needn't they B. need they C. don't they D. do they 查看答案