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 h(e tqb rbv.9u(and mirror to observe the back of her head wh.dsucub63 w2px1pz cgi-mecg. h0 ;x 0ile 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 the back of her6se-0. mxpcubgid;p xz .h2g3cc1 0 uw 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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