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 holn- nxhs(ym+1bvskx t. 8rng9 9 my* xor5dj* .j d8z3ub*p5bi8 kxtvg)d a hand mirror to observe the 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 her head, she will see t 5)gd*5.div*k3 xoj ub bx*yjr8p8mtzhe 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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