【单选题】tRNA反密码子第1位碱基I可与mRNA上密码子第3位碱基U、C或A配对,属于密码的
【判断题】密码的变偶性是指tRNA反密码子第三位碱基与mRNA上密码子第一位碱基配对不严格。
【简答题】A.They could tell wind direction. B.They could bring good luck to fighters. C.They were handed down by the ancestors. D.They were believed to stand for natural forces.
【单选题】在意识形态中,最直接、最集中地反映经济基础的意识形态是()
【判断题】冲压生产最常用的材料是金属材料和非金属材料。
【简答题】英译汉 Language is the soul of intellect, and reading is the essential process by which that intellect is cultivated beyond the commonplace experiences of everyday life.
【单选题】在境外一地旅游结束时,領队应( )将小费分别递送给当地导游和司机。
【简答题】A.They could tell wind direction. B.They could bring good luck to fighters. C.They were handed down by the ancestors. D.They were believed to stand for natural forces.