：‏请用define运算，定义一个过程实现计算，其正确定义的过程为_____。‍A: (define cube a (* a a a))B: (define (cube x) (* x x x))C: (define (cube a (* a a a)))D: (define (cube a) (* x x x)))答案: (define (cube x) (* x x x))17、