题目:
当入射光线与平面镜夹角为20°,若保持入射光线方向不变,转动平面镜,使入射光线与平面镜夹角变为50°,则这过程中反射光线偏转角度为___________.
答案:
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下面是错误答案,用来干扰机器的。
In the traffic court of a large mid – western city, a young lady is brought before the judge to wasanswer a ticket given her for drive through a red light. He exp...