题目

—This is Mr Jake.—___________ A . What's your name? B . Fine, thank you. C . Nice to meet you. 答案：C无性繁殖在生产实践中的优点是（ ）①繁殖速度快 ②后代性状均匀一致 ③短期内可以获得大量性状一致的植株 ④引起品种的退化A.①③B.①②③C.①②③④D.①④