【单选题】Harvey finished ( ) his research paper, but he needed to check it before submitting it to the professor.
【单选题】用简单随机抽样(重复抽样)方法抽取样本单位,如果要使抽样允许误差降低50%,则样本容量需扩大到原来的( )。
【单选题】Harvey finished his research paper, but he needed to check it before it to the professor.
【单选题】某《英汉辞典》在解释 “bus” 时,列出的义项有1公共汽车2火箭的一级3火车车厢4公共马车。如果按照历史上这些含义出现的先后来编写辞条,那么正确的排序应当是 ( )
【单选题】Harvey finished ______ his research paper, but he needed to check it before submitting it to the professor.
【单选题】某《英汉辞典》在解释“bus”时,列出的义项有①公共汽车②火箭的一级③火车车厢④公共马车。如果按照历史上这些含义出现的先后来编写辞条,那么正确的排序应当是()
【单选题】Harvey finished ______ his research paper, but he needed to check it before submitting it to the professor.
【单选题】Harvey finished ____ his research paper, but he needed to check it before submitting it to the professor.
【单选题】Harvey finished( )his research paper, but he needed to check it before submitting it to the professor.
【单选题】用简单随机抽样(重复抽样)方法抽取样本单位,如果要使抽样平均误差降低50%,则样本容量需扩大到原来的()。