【判断题】抽样偏差(Samplingbias)是指从总体中非随机性抽样带来的系统性错误。
【简答题】He is the very person whom I m looking for.英译汉
【单选题】His English, ______ used to be very poor is now excellent.
【单选题】I love places _____________ the people are very friendly.
【单选题】Tom is very helpful. He is the very person _ you can turn in trouble. [ ]
【单选题】听力原文:W: With whom did you go fo the Great Wall? M: My parents, my sister Mary and good friend Charile. How many people went to the Great Wall?
【判断题】旋转式货架比传统的仓库货架更为先进,可减少人力,增加空间利用率,可利用计算机快速检索找到指定储位,易于拣货。
【单选题】She is becoming fat, _______ bothered her very much.
【单选题】The doctor __________ she sent her friend is very well known.