题目

写出下列反应的离子方程式: (1)过氧化钠与水反应                                         。                                                (2)碳酸氢钙溶液和过量氢氧化钠溶液                                            。 (3)碳酸氢钠溶液和过量氢氧化钡溶液                                            。 (4)铜与氯化铁溶液                   With tags(标签)________ to the luggage, it won’t take long for the passengers to find theirs correctly. [  ] A.attaching B.attached C.to attach D.attaches
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