下列说法不正确的是( )。
| A．Na2O2用作呼吸面具的供氧剂 |
| B．NaHCO3的热稳定性大于Na2CO3 |
| C．乙醇可与金属钠反应放出氢气 |
| D．金属钠着火时，可用细沙覆盖灭火 |
相关试题
在一定温度下，反应
的平衡常数为10。若将1.0
的
通入体积为1.0
的密闭容器中，在该温度时
的最大分解率接近于
| A． | 5% | B． | 17% | C． | 25% | D． | 33% |
Now that we’ve discussed our problem, are people happy with the decisions _______? 
| A．taking | B．take | C．taken | D．to take |
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 |
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