The repeating units on the copolymer chain may be arranged in various sequences along the backbone chain, including:

The repeating units on the copolymer chain may be arranged in various sequences along the backbone chain, including:
A.Random copolymer　
B.Block copolymer
C.Graft copolymer
D.Alternative copolymer
正确答案：Random copolymer　； Block copolymer；Graft copolymer；Alternative copolymer