将少量Na2O2固体加入到Ca(HCO3)2溶液中,下列有关说法正确的是
| A．溶液中只有气体产生 |
| B．溶液中只有沉淀产生 |
| C．溶液中可能有反应Ca2＋+OH－+HCO－3＝CaCO3↓+H2O发生 |
| D．溶液中产生的气体是二氧化碳。 |
相关试题
Everybody was touched _____ words after they heard her moving story. 
| A．beyond | B．without | C．of | D．in |
One of the most important questions they had to consider was _____ of public health. 
| A．what | B．this |
C．that | D．which |
Encourage your children to try new things, but try not to ___ them too hard.
| A．draw | B．strike | C．rush | D．push |
The computer was used in teaching. As a result, not only__________, but students became more interested in the lessons. 
| A．saved was teachers’ energy | B．was teachers’ energy saved |
C．teachers’ energy was saved | D．was saved teachers’ energy |
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