A.RNA B.單鏈DNA C.雙鏈DNA D.環(huán)狀DNA
A.①②③④⑤③B.②③④⑤③①C.①②③⑤⑦⑧D.①②③④⑦⑧
A.30% B.35% C.70% D.無(wú)法計(jì)算