【单选题】在参数估计中,要求用样本统计量来估计总体参数,评价样本统计量的标准之一是它与总体参数的离差越小越好, 这种评价标准称为( )
【简答题】用适当的连词填空 1. I can’t decide ____________ dictionary I should buy. 2. That’s ____________ he refused my invitation. 3. I am very interested in ____________ he has improved his pronunciation in such a sh...
【单选题】一休克病人,血压回升到130/80mmHg,CVP达到10cmH2O,尿量为15ml/h,为增加尿量应该
【判断题】跳火试验时,如果火花塞跳火间隙处是有强烈的蓝色高压火花,说明点火系统中的零部件有故障。
【多选题】从一个总体中可以抽取许多个样本,因此( )。
【简答题】W: Good morning! M: Good morning! W: I haven’t 1 . How are you doing? M: Very good. I don’t know if you hear that I 2 . W: That’s cool. Do you have any roommates? M: No. I think it is 3 for me, becaus...
【单选题】患者女,37岁,以“右上腹阵发性绞痛”收入院,诊断为胆石症。行胆总管切开取石术T管引流术。术后5天,引流液每天2000ml,提示