【单选题】
下列字符序列中,可用作C标识符的一组字符序列是___
A. S.b,sum,average,_above
B. class,day,lotus_，2day
C. #md,&12x,mouth,student_n!
D. D56,r_1_2,name,_st_1
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答案
D
解析
暂无解析
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