摘要： >> a_23=[2,3,4,5,10] a_23 = 2 3 4 5 10 >> a_23(2)=[] a_23 = 2 4 5 10 >> a_23=[2,3,4,5,10] a_23 = 2 3 4 5 10 a_23([1,2,3])=[] a_23 = 5 10 阅读全文