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 hand mirror to observe the back jwj6px.q5c m4 ofx+:njs+ 7p cxu her head while standing in front of a +cxp u7snj:+xnd 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 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
| 
