物质X可发生下列所示的两个反应,则X可能是(  ) ①X+碱→盐+水  

物质X可发生下列所示的两个反应,则X可能是(  )

X+碱→盐+   X+金属氧化物→盐+

A.HCl         B.CO         C.NaOH        D.CaO

答案

A

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