题型:判断题 The president of the World Bank says he has a passion for China,________he remembers starting as early as his childhood. A.whereB.whichC.whatD.when 查看答案
题型:判断题 关于随机抽样,下列哪一项说法是正确的()。A.抽样时应使得总体中的每一个个体都有同等的机会被抽取B.研究者在抽样时应精心挑选个体,以使样本更能代表总体C.随机抽样即随意抽取个体D.为确保样本具有更好的代表性,样本量应越大越好E.以上均不对 查看答案