THE STAMP WHICH DISAPPEARS(无全文)

作者: 刊名:中学生天地:高中学习版(C版) 上传者:

抱歉,该篇全文还没有人上传哦!我要 上传, 我要 求助

【摘要】Put a stamp on your table. Then put a glass of water on the stamp. Cover the glass with a saucer, as shown. The stamp disappears! Try to walk arotmd the glass and look into it from different sides. You will not be able to see the stamp.

参考文献

引证文献

问答

我要提问