The cluster sample method is most often used because, in the initial stages of emergencies, people are rarely living in a structured pattern.
英
美
- 分组抽样方法是最常用的,因为在紧急情况的初期,人们很少住在有组织的环境中。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries