【单选题】We all believe that it would be hard for him to______extra responsibilities now.
【判断题】除了大肠埃希菌外,还可以利用酵母系统表达人胰岛素,这种宿主表达的人胰岛素二硫键结构和位置正确,不需要复性加工处理。
【单选题】______ the sense of someone watching him, Joey would take a shower right now in this beautiful river.
【单选题】对某班级学生的生活活动状况进行统计调查,则下列属于不变标志的是( )
【单选题】Holonyak believed that his students that were working with him on the project would get the Lemelson MIT Prize sooner or later.