【简答题】原核细胞与真核细胞的主要区别是:原核细胞没有真正的细胞核,只有____。
【简答题】原核细胞只有()没有(),真核细胞有()和()结构
【单选题】企业为车间管理人员缴纳的失业保险费应计入
【单选题】I can ________ remember that there was a time when a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound.
【单选题】The oceans and seas _________ the islands are deep blue and many cities lie _________ a bay.
【单选题】只由一个细胞构成,原生质没有多大分化的生物是( )
【单选题】I can well remember that there was a time _____ a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound.
【单选题】Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with _______.
D.
inadequate lubrication