(A).当 k = 1 时,T(n) = Θ(nlogn)
(B).当 k = 1 时,T(n) = Θ(nlog2n)
(C).当 k = 4 时,T(n) = Θ(nlogn)
(D).当.k = 4 时,T(n) = Θ(nlog2n)
“2”是平方