摘要： 5-2（a）def axb(self,a,b): m = a*b return m5-2（b）a = file.axb(2,4)print a5-3def grade(self,mark): if 90 <= mark <=100: return 'A' if 80 <= mark <=89: return 'B' if 70 <= mark <=79: return 'C' if 60 <= mark <=69: ... 阅读全文