选择题:偶遇抽样、判断抽样、定额抽样和滚雪球抽样都属于( )的范畴。 题目分类:习题答案 题目类型:选择题 号外号外:注册会员即送体验阅读点! 题目内容: 偶遇抽样、判断抽样、定额抽样和滚雪球抽样都属于( )的范畴。 参考答案:【答案仅供学习,请勿对照自行用药等】
将一个阻值是4Ω的电热器放进质量是0.5kg的冷水中,通过电热器的电流是5A,且电热器放出的热量全部被水吸收,则7min可使水温升高多少摄氏度? 将一个阻值是4Ω的电热器放进质量是0.5kg的冷水中,通过电热器的电流是5A,且电热器放出的热量全部被水吸收,则7min可使水温升高多少摄氏度? 分类:习题答案 题型:选择题 查看答案
Hidden Species May Be Surprisingly CommonCryptic species animals that appear ide "Hidden" Species May Be Surprisingly CommonCryptic species animals that appear identical but are gene 分类:习题答案 题型:选择题 查看答案
What will be the benefit if the research on smart windows turns out to be succes What will be the benefit if the research on smart windows turns out to be successful, according to th 分类:习题答案 题型:选择题 查看答案
These programmes are of immense value to old people. These programmes are of immense value to old people.A.naturalB.fatalC.tinyD.enormous 分类:习题答案 题型:选择题 查看答案