【单选题】____did we ask her not to be late for school.
【单选题】—How’s your new babysitter? —We ______ ask for a better one. All of our kids love her so much.
【简答题】— How’s your new babysitter? —We ______ ask for a better one. All our kids love her so much. A.should B.might C.mustn’t D.couldn’t
【单选题】— How's your new babysitter? — We _____ ask for a better one. All our kids love her so much. [ ]
【简答题】请回答下列与中和热的测定实验有关的问题: (1)量取反应物时,先取50 mL 0.50 moI·L -1 盐酸加入反应容器中,还应加入的试剂是____(填字母)。 A.50 mL 0.50 mol·L -1 NaOH溶液 B.50 mL0.55 mol·L -1 NaOH溶液 C.1.0 g NaOH固体 D.1.05 g NaOH固体 (2)在实验过程中,该同学需要测定并记录的实验数据有 ___...