问题 问答题 看图，回答问题。1. Did Mike write an e-mail?___________________________________________2. What did they do?___________________________________________ 答案 1. Yes, he did.2. They played cards.答案不唯一
课外小组利用碘滴定法测某橙汁中维生素C的含量，其化学方程式如下：