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被称为自然实验法的是（   ）

单选题
2022-04-02 17:37
A、<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-bidi-font-family:="" "times="" roman""="">现场调查研究</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: " times="" new="" roman","serif";="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体;="" mso-hansi-font-family:="" 宋体"=""><span style="mso-spacerun: yes"> </span></span>
B、<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-bidi-font-family:="" "times="" roman""="">实验室实验</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: " times="" new="" roman","serif";="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体;="" mso-hansi-font-family:="" 宋体"=""></span>
C、<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-bidi-font-family:="" "times="" roman""="">现场实验</span>
D、<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-bidi-font-family:="" "times="" roman""="">观察法</span>
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正确答案
C
试题解析
标签： 佳木斯职业学院继续教育学院 语文教育 高起专 心理学 平时作业2
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逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。
逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。
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