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【单选题】
数据库的三要素，不包括A.
完整性规则
B.
数据结构
C.
恢复
D.
数据操作
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【简答题】According to the race rules, dogs for race must have ______.
【简答题】A．Progress in medicine. B．Progress in computers. C．Progress in new materials. D．Progress in helicopters.
【单选题】During recent years we have heard much about 'race': how this race does certain things and that race believes certain things and so on. Yet, the 【21】______ phenomenon of race consists of a few surface...
A.
complete
B.
full
C.
total
D.
whole
【简答题】A．Education, religion, race and social class. B．Education and race. C．Religion, race and social class. D．Religion and social class.
【简答题】电压互感器二次侧不容许短路是因为( )? A二次侧会出现过电压 B二次侧短路会烧毁绕组 C二次侧短路会烧毁仪表 D电压互感器无效
【简答题】通过结晶，溶液中大部分的杂质会留在母液中，再通过过滤、 ，可以得到纯度较高的晶体
【简答题】According the race rules, dogs for race must have ______.
【简答题】A．Progress in medicine. B．Progress in new materials. C．Progress in computers. D．Progress in helicopters.
【简答题】通过结晶，溶液中大部分的杂质会留在母液中，再通过 ，可以得到纯度较高的晶体
【简答题】Enlightenment beleives in perfectablity of human race; Human beings have ability to make progress by applying_______.
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