皮皮学，免费搜题
登录
搜题
【单选题】
某县在进行学龄前儿童百日咳疫苗的接种率抽查时，首先将全县各乡镇按人均收入分为好、较好、差三类，然后各随机抽取1/10的学龄前儿童作调查，取得结果。问：此种抽样方法是A.
单纯随机抽样
B.
系统抽样
C.
整群抽样
D.
分层抽样
E.
多阶段抽样
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】Vocabulary Complete these sentences with the words in the box. Change the form where necessary. beneficial assert strategy cooperative motivation obsess perception ambitious intimidate isolation 1. Pe...
【单选题】The First Convicts Transported To AustraliaDuring the 17th century and 18th century European explorers reached Australia. In 1770 Captain Cook claimed eastern Australia for Britain. He called it New S...
A.
Australia.
B.
America.
C.
Portsmouth.
D.
Botany Bay.
【单选题】The First Convicts Transported To AustraliaDuring the 17th century and 18th century European explorers reached Australia. In 1770 Captain Cook claimed eastern Australia for Britain. He called it New S...
A.
Captain Cook.
B.
Captain Arthur.
C.
Captain Phillip.
D.
The convicts.
【单选题】The First Convicts Transported To AustraliaDuring the 17th century and 18th century European explorers reached Australia. In 1770 Captain Cook claimed eastern Australia for Britain. He called it New S...
A.
Australia.
B.
America.
C.
Portsmouth.
D.
Botany Bay.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
