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问题详情

is a sequence of letters and digits, the first character must be a letter.

A、An identifier

B、A string

C、An array

D、program

时间：2021-12-31 18:34 关键词：

答案解析

A
解析：译文：标识符是由字母或数字构成的序列，其第一个字符必须是字母。

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