以下各表达式中，运算结果为字符型的是（）。A、SUBSTR（’123.45’，5）B

发布时间：2018-02-24 06:32 │ 来源：www.tikuol.com

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问题：

以下各表达式中，运算结果为字符型的是（）。

A、SUBSTR（’123.45’，5）

B、’IBM’$’Computer’

C、AT（’IBM’，’Computer’）

D、YEAR=’2000’

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完形填空。
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