The paper analyses the teaching of Engineering Survey, describes the basic concepts of error including the definitions of accident error and closure, and finally provides examples for teaching.
主要分析了工程测量教学中误差基本概念的应用，描述了偶然误差和闭合差等概念，举出了教学中的一些例子。
Examples of closure behavior of bi- or multi-lobed stigmas in response to being touched by animal pollinators were mainly studied in some taxa of the order Scrophulariales .
植物花的多裂片柱头在传粉者接触后迅速闭合的现象主要存在于玄参目的一些类群中。
Examples of closure behavior of bi- or multi-lobed stigmas in response to being touched by animal pollinators were mainly studied in some taxa of the order Scrophulariales .
植物花的多裂片柱头在传粉者接触后迅速闭合的现象主要存在于玄参目的一些类群中。
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