A:an= n−1n+1 (n∈N*)
B:an= n−12n+1 (n∈N*)
C:an= 2n2n+1 (n∈N*)
D:an= 2(n−1)2n−1 (n∈N*)
T2噬菌体在大肠杆菌细胞中增殖时,不需要下列哪种酶参与
—____ is your friend? —My friend is Danny.