【判断题】【消耗次数：1】
角系数不仅取决于物体的形状、大小、距离和相对位置，也与物体的种类和温度有关。
①
正确
②
错误
参考答案：
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【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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人——面——物
②
Normal
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物——人——面
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C. 人——物——面
④
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面——人——物
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