根据图所示切割体的正面投影和水平投影，用正垂面来切割圆柱体外表面，其截交线的侧面投影为椭圆弧。<img src=http://60.205.157.60/course/a@4A86563E6B6DA06893F711ACC27EA6B8.png title=4.png alt=4.png/>

【判断题】【消耗次数：1】

① 正确

② 错误

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