【多选题】带肋钢筋机械性能试验取样应从( )上取一组试样,一组试样拉力、冷弯( )。
【单选题】( )是细胞生命活动的控制中心,遗传物质主要存在于其中。
【简答题】核酸是生物的遗传物质,其包括()和()两种,其中前者为遗传物质的主要形式,大量存在于细胞核的()上,也少量存在于个别细胞器中,如动物的()。
【简答题】The young man at the counter has some sort of registration problem.
【判断题】The headmaster liked the young man at first sight.
【判断题】吴某家保姆甲在将吴某之子(3岁)从幼儿园接出后带到外地藏匿,向吴某打电话索要赎金50万元,在双方约定的交易地点交易时被埋伏的警察当场抓获。甲未拿到赎金,其行为构成绑架罪的未遂。
【简答题】A.Immediately after he gave back the money. B.As soon as he saw the young man at the roulette table. C.On reading the 'Thank-you' note. D.When he heard the young man's response.
【单选题】The young man rescued the child at the of his own life.
【单选题】She looks so_____ that she won the heart of the young man at once.
【简答题】人类的活动不仅需要物质和能量,还需要信息。生物体的遗传信息主要存在于细胞的___________结构中。