【单选题】_____ poor in those days had a hard time.
【单选题】DNA复制时的RNA引物的作用是( )
C.
为DNA合成原料dNTP提供3'-OH作为附着点
【单选题】In the early days of radio, those who reported the news were ________ to speak with standard dialects.
【单选题】DNA复制中,RNA引物的主要作用是()。
【判断题】当DNA两条链的复制同时发生时,它是由一个酶复合物: DNA聚合酶III负责的,真核生物的复制利用3个独立作用的DNA聚合酶,Polδ的一个拷贝(为了起始)和 Polδ的两个拷贝(DNA多聚体化,当MFl将RNA引发体移去之后填入).
【简答题】A company advertised in the newspaper for a sales position. Details of the requirements, salary and benefits were given. It was also clearly stated that applicants needed to take an aptitude test (能力倾...
【单选题】如果大小和方向都随时间变化的电流叫做( )
【多选题】如果电流(或电压、电动势)的大小和方向都随时间变化而变化,就叫做交流电。下列电源属于交流电的是 。
【简答题】In those days, executives expected to spend most of their lives in the same firm and, unless they were dismissed for ________, to retire at the age of 65. A) integrity B) denial C) incompetence D) ded...