下列是某些学生自己总结的一些规律，其中正确的是
| A．氧化物不可能是还原产物只可能是氧化产物 |
| B．一种元素可能有多种氧化物，但同一化合价只对应一种氧化物 |
| C．一种物质不是电解质，就一定是非电解质 |
| D．有些化学反应不属于化合、分解、置换、复分解反应中的任何一种反应 |
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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