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""="">现场实验</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""="">观察法</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""="">谈话法</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""="">活动产品分析法</span>
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