计算结果不是字符串”Student”的语句是( )。A. left(”Student”,7)B. substr(“MyStudent”,3,7)C. right(”MyStudent”,7)D. at(”MyStudent”,3,7)
计算结果不是字符串”Student”的语句是( )。
A. left(”Student”,7)
B. substr(“MyStudent”,3,7)
C. right(”MyStudent”,7)
D. at(”MyStudent”,3,7)
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