---What do you think of their marriage? ---______, if I were Kate, I would not marry him. A.Generally speaking B.I have no idea C.To be honest D.To my surprise 答案:C从H、C、O、Na四种元素中,选择适当的元素填写符合下列要求的物质的化学式:(1)常用于扑灭火灾的固态氧化物 ;(2)清洗炉具的洗洁剂中的碱 ;(3)食醋中含有的一种酸 ;(4)可用来治疗胃酸过多的一种盐 .