题型:问答题 简答题 下图为遗传物质的组成、基因、DNA和染色体之间关系示意图,有关叙述正确的是[ ]A.若C代表磷酸基团,则A是核糖B.在细胞分裂过程中F和G始终保持1:1的比例关系C.遗传信息是E中D的排列顺序D.F的基本组成单位是图中的E 查看答案
题型:问答题 简答题 — Why didn't you go to the cinema with us this afternoon? — I _____ at the station for my uncle from Beijing. [ ]A. was waiting B. have waited C. am waiting D. will wait 查看答案