【单选题】Spike Inc. is a sportswear manufacturer that recently launched its new line of customizable running shoes. The shoes come with a digital component that allows them to adapt to the runner's biomechanic...
【简答题】V C 又名抗坏血酸,易溶于水,易被氧化,能与碘反应。人体缺乏V C 可能引发许多疾病。某研究性学习小组对它研究如下: (1)猜想:V C 可能具有酸性。 (2)实验方案: 提供试剂:V C 药片、蒸馏水、紫色石蕊试液、无色酚酞试液、NaOH溶液、pH试纸。(实验仪器自选) 根据以上试剂,请帮助他们设计出两种实验方案,并写出实验现象: (3)结论:V C 具有酸性,根据V C 的性质,判断下列物...