本题目来源于试卷: Reflection and Refraction，类别为 美国物理杯赛(Physics Bowl)
[单选题]
05.18: A student hold a haxs/b/q)og/ dkf *qu*b5lzb sb0d,m1x nd mirror to observe thel )uyge7gn2zo 81 nb8l back of her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind heyzo 71ng)2ll8b un ge8r head, she will see the back of her head how far behind the wall mirror?
A. 6 ft
B. 5 ft
C. 4 ft
D. 3 ft
E. 2 ft
参考答案: A
本题详细解析:
暂无
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