(c) The last number of the maximum-length snake sequence is__(4)__
(A)9(0,0)
(B) 6(3,2)
(C) 7(3,3) 
(D) 1(2,3)
(E) 7(0,2)

答案：登入後查看
統計： A(0), B(0), C(1), D(0), E(0) #2852899