题目

使用酸碱中和滴定法测定市售白醋的总酸量(g/100 mL)。Ⅰ．实验步骤：(1)配制100 mL待测白醋溶液。量取10.00 mL市售白醋，注入烧杯中用水稀释后转移到           (填仪器名称)中定容，摇匀即得。(2)用               量取待测白醋溶液20.00mL于锥形瓶中，向其中滴加2＿＿＿＿＿＿＿＿＿＿＿作指示剂。(3)读取盛装0．100 0 mol·L－1 NaOH溶液的               (填仪器名称)的初始读数。如果液面位置下图所示，则此时的读数为           把下列各句改为被动语态。1. We clean our classroom every day.     Our classroom _____  by us every day.2. They produce silk in Suzhou.     Silk _____  in Suzhou.3. They speak English in class.    English _____  in class.4. He teaches us ten words every class.    Ten words _____  to us _____  every class.5. We use keys for opening the door.     Keys _____  opening the door.