问题
填空题
在定义字段有效性规则时,在“信息”框中输入的表达式类型是______。
答案
参考答案:字符型
在表设计器的“字段”选项卡中有一组定义字段有效性规则的项目,它们是规则(字段有效性规则)、信息(违背字段有效性规则时的提示信息)、默认值(字段的默认值)3项。其中,“规则”是逻辑表达式,“信息”是字符串表达式,“默认值”的类型则视字段的类型而定。
在定义字段有效性规则时,在“信息”框中输入的表达式类型是______。
参考答案:字符型
在表设计器的“字段”选项卡中有一组定义字段有效性规则的项目,它们是规则(字段有效性规则)、信息(违背字段有效性规则时的提示信息)、默认值(字段的默认值)3项。其中,“规则”是逻辑表达式,“信息”是字符串表达式,“默认值”的类型则视字段的类型而定。
根据表中内容在短文中填入适当的单词或词组。 | ||||||||||||||||||||||||
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Tom and Jim live in the same street. They're classmates. They often go to school together. Tom usually ______ (1) at around a quarter to seven and ______(2) at around a quarter past seven. He eats lunch at ______(3) o'clock at school. He usually ______(4) quite early at about ten to six. Jim usually gets up at around ______(5). He ______(6) eat breakfast in the morning. He eats lunch at ______(7) at home, because his home is near the school. Jim eats dinner quite ______(8) at about ______(9). Tom and Jim go to bed at the ______(10) time—at about twenty past nine. 1.______ 2.______ 3.______ 4.______ 5.______ 6.______ 7.______ 8.______ 9.______ 10.______ |