对许多学生来说,代数公式是胡言乱语:它们缺乏象征意义。符号包括识别代数公式的结构、赋予其意义和用公式进行推理。除了基本功,解决代数问题也需要符号感,不知道如何系统地教授符号感。
I have an application that will accept URLs from the built in web browser via the \"Share page\" menu item. I\'m using the send intent and it works just fine. However, I\'d like to accept a URL and pr