问题
填空题
Visual FoxPro的主索引和候选索引可以保证数据的 【6】 完整性。
答案
参考答案：域
解析：[知识点] 表的索引：主索引，候选索引，普通索引，惟一索引[评析] 域：属性的取值范围，即不同记录对同一字段的取值所限定的范围。Visual FoxPro的主索引和候选索引可以保证数据的域完整性
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Visual FoxPro的主索引和候选索引可以保证数据的 【6】 完整性。
参考答案：域
解析：[知识点] 表的索引：主索引，候选索引，普通索引，惟一索引[评析] 域：属性的取值范围，即不同记录对同一字段的取值所限定的范围。Visual FoxPro的主索引和候选索引可以保证数据的域完整性
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| What do you do at the weekend?Some people like to 1 at home,but others like to go 2 a walk or play football.My friend Jack works hard in a factory during the 3 .At the weekend,he always 4 the same thing.On Saturday he 5 his car and 6 he goes with his family to a village by car. His uncle and aunt have a farm there.It isn't a 7 one but there's always 8 to do on the farm.The children help with the animals and give them their 9 .Jack and his wife help in the field.At the end of the day,they are all 10 and Jack's aunt gives them a big meal.
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