常用的抽样方法不包括()。 A.单纯随机抽样 B.系统抽样 C.分层抽样 D.整群抽 发布时间:2017-06-08 15:49 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 常用的抽样方法不包括()。A.单纯随机抽样B.系统抽样C.分层抽样D.整群抽样E.随意抽样
题型:单项选择题 A1/A2型题 Little ________ about her own safety, though she was in great danger herself.A.did Rose careB.Rose did careC.Rose does careD.does Rose care 查看答案