【单选题】
正投影法中，投影面、观察者、物体三者相对位置是( )
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人——面——物
②
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物——人——面
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C. 人——物——面
④
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面——人——物
【单选题】
( )是研究者在一定理论指导下，通过感官或借助观察辅助仪器，有目的、有计划地察看、记录、分析人、物、场所，获取旅游市场原始资料和信息的方法。
①
实验法
②
文案法
③
访谈法
④
观察法