题目

--- Do you know the boy _______ is playing soccer there? --- Certainly. He is a friend of my _______. A. who; brother’s                      B. who; brother   C. whom; brother’s                     D. whose; brother   答案:A如图,照镜子时人的位置保持不变,如果不小心镜子裂开成两半,并分别向上下两侧平移一段距离,则人通过上、下两半面镜子( ) A.不能成像了B.只能各成一半的像C.都成完整的像,且像在相同位置D.都成完整的像,且像在不同位置
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