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

题库:初级程序员 类型:最佳选择题 时间:2017-07-03 12:03:49 免费下载:《单选集》Word试卷

(72) 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

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