化学与科学、技术、社会、环境密切相关，下列有关说法正确的是
| A．锅炉水垢中的硫酸钙可用碳酸钠溶液处理，使之转化为碳酸钙，再用酸除去 |
| B．日本福岛核电站爆炸时释放的两种放射性核素13153I与13755Cs的中子数相等 |
| C．铝合金的大量使用归功于人们能使用焦炭等还原剂从氧化铝中获得铝 |
| D．海水淡化可以解决淡水供应危机，向海水中加入明矾可以使海水淡化 |
相关试题
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
I’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
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