每日答题

初中数学，高中数学，语文思维，英汉互译，课外拓展

初中数学（图一）：证明海伦公式

高中数学（图二）：证明万能公式

语文思维（图三.图四）：用与图中相同的思路猜测会如何考《春晓》
（2）古诗默写：____水红____（标点符号已省略）

英汉互译：
（1）用精妙的语言翻译：你们中国有句古话，叫做 识时务者为俊杰

（2）The Second World War had begun, and John wanted to join the army, but he was only 16 years old, and boys were allowed to join only if they were over 18. So when the army doctor examined him, he said that he was 18. 　　But John‘s brother had joined the army a few days before, and the same doctor had examined him too. This doctor remembered the older boy‘s family name, so when he saw John‘s papers, he was surprised. 　　"How old are you?" he said. 　　"Eighteen, sir," said John. 　　"But your brother was eighteen, too," said the doctor. "Are you twins?" 　　"Oh, no, sir," said John, and his face went red. "My brother is five months older than I am."

课外拓展：
试用强人存原理和弱人存原理分析，地球为什么存在生命

诸子百家这个大家应该很熟悉了，那么这百家究竟是哪百家？或者能考究的有哪几家？