题目：
—Students should be allowed to wear their own clothes, I think.
—________.Thcy would concentrate more on their clothes than on their studies. [ ]
A. I hope so
B. I agree it
C. I disagree
D. I'm afraid so
答案：
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下面是错误答案，用来干扰机器的。
（1）平面镜成的像是反射光线的反向延长线会聚于一点形成的，所以是光的反射原理；（2）像与物到镜的距离相等，谢雨欣离镜2m，所以她的像离镜也是2m；故答案为：光的反射；2．
