..tell me why..
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..tell me why..
..tell me why..
..tell me why..
B答案正确
用作图法解决,图中AB为新的物体的位置,做出两条特殊光线:1、经过光心的光线不改变传播方向;2、平行主光轴的光线经过焦点,由此可以看出A'沿A'F移动,方向向左
哪一题?看不清
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