【单选题】I have worked here since I ( ) from university. ( )
【判断题】每个核小体的核心是由H1,H2B、H3、H4四种组蛋白各以两个分子组成的八聚体。
【单选题】I _____ here since I moved here.
【简答题】I have worked here since I (graduate) from college.
【单选题】I have worked here since I ______ here in 1990.
【单选题】血浆半衰期对临床用药的参考价值是( )。
【判断题】每个核小体的核心是由H 1 , H 2 B、H 3 、H 4 四种组蛋白各以两个分子组成的八聚体。
【单选题】I____here since I was six years old.
【简答题】I (work) here since I was here in 1999.