请帮我做这道题并讲解,谢谢___he first heard of that the compass was first invented in China.A.It was from the teacher that B.It was the teacher whom C.That was from the teacher who .D .That was the teacher whom

请帮我做这道题并讲解,谢谢___he first heard of that the compass was first invented in China.A.It was from the teacher that B.It was the teacher whom C.That was from the teacher who .D .That was the teacher whom 请帮我讲解这道题 比较大小,并帮我讲解一下, 帮我讲解一下勾股定理?谢谢 什么是十字相乘 请帮我讲解,并出几个例题 请帮我找出写了汉语这一段英语中的语法,并讲解, 请大神朋友们帮我解答讲解一下,希望详细点,谢谢大家了! 燕山妫水什么意思啊?请尽快帮我讲解一下,谢谢! 请帮我讲解 一下好不啊 请帮我解一下这道题.并说明一下理由.帮我解释一下.谢谢 句子有哪些修辞方法?文章有哪几种类型?请举例并帮我详细讲解一下, 请帮讲解 请帮讲解图中题. 帮我讲解一道题,高一的,谢谢! 请帮我讲解一下这道线性代数例题好吗 请C语言大虾,帮我讲解补码怎么理解! 请你们帮我讲解一下重方, 讲解两句话能勤德业惟良友有益身心在读书帮我讲解一下 谢谢了