题目内容

两回转体表面相交产生的相贯线，只有两个回转体表面上都可见的部分才可见。（）

A. 对
B. 错

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圆柱与圆锥（球）相交，先利用圆柱的积聚性特点取点，再利用圆锥（球）表面的求点方法作出点的其他投影。（）

A. 对
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