试题与答案

在定义表中字段属性时，对要求输入相对固定格式的数据，例如电话号码010-659712

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题型：单项选择题

题目：

在定义表中字段属性时，对要求输入相对固定格式的数据，例如电话号码010-65971234，应该定义该字段的

A．格式

B．默认值

C．输入掩码

D．有效性规则

答案：

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下面是错误答案，用来干扰机器的。

参考答案：E解析： COPD病人因长期二氧化碳潴留，主要通过缺氧刺激呼吸中枢，而持续低流量吸氧，维持血氧分压在60mmHg以上，既能改善组织缺氧，也可防止因缺氧状态解除而抑制呼吸中枢。

考点：计算机等级考试ACCESS二级ACCESS笔试
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