题目

研究人员把噬菌体和细菌按1︰10混合,然后除去游离的噬菌体,在培养过程中定期取样,稀释涂布在连片生长的细菌平面(菌苔)上,检测实验结果表明,混合后24min内取样涂布,菌苔上产生空斑的数目不变;混合24min后取样,菌苔上空斑数目迅速增加;再过10min取样,菌苔上空斑数稳定。下面的分析和推理不正确的是 A.24min内取样,新复制的噬菌体还未从细菌体内释放出来 B.34min时取样,根据空斑数量可推测样液中噬菌体的数量 C.取样液中的噬菌体涂- Do you have______ready for the opening ceremony. Ted? - No. we still need some volunteers.A.everything B.somethng C.anything D.nothing
生物 试题推荐