【单选题】
随着行为或事件的发生，观察者详细地作观察记录，然后对观察资料加以分类，进行分析研究，这种科研方法称为：（)
①
时间取样观察法
②
事件取样观察法
③
观察评定
④
叙述性观察法
【单选题】
正投影法中，投影面、观察者、物体三者相对位置是( )
①
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C. 人——物——面
④
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面——人——物