【单选题】与 mRNA 上 ACG 密码子相应的 tRNA 反密码子是
【单选题】—I wonder why Mr. Brown hasn't showed up at the meeting yet. —I' m not sure, but he ________ in a traffic jam driving here.
【单选题】与mRNA上ACG密码子相应的tRNA反密码子是
【单选题】与mRNA的ACG密码子相对应的tRNA的反密码子是( )
【简答题】A.recommend B.guess C.bet D.urge
【单选题】化石燃料燃烧排放的()在空气中可以缓慢地转化成三氧化硫;三氧化硫与大气中的水汽接触,就生成硫酸;硫酸随雨雪降落,就形成酸雨。
【简答题】A.impel B.spur C.force D.urge
【单选题】The president _____ all people _____ our environment. [ ]