在点子图上分别画两条互相垂直的线段和两条互相平行的线段 ·················································· ·················································· ·················································· ·················································· 查看更多

 

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在点子图上分别画两条互相垂直的线段和两条互相平行的线段

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在点子图上分别画两条互相垂直的线段和两条互相平行的线段

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