小强和小华是一对好学上进的表兄弟．暑假过后小强升初三，小华升初二．他俩经常聚在一块交换学习情况．这不，小华又找小强来了，手里还拿着一本新物理书呢．小强：今天拿本物理书，准备自学啊？小华：我可是特来向你请教的．物理是今年新开的一门主课，我想在正式学习前听听 Xiaoqiang and Xiaohua are cousins ​​who are studious and motivated. After the summer vacation, Xiaoqiang went up to third grade and Xiaohua rose to the second grade. They often gather in exchange for learning. No, Xiaohua came to Xiaoqiang again. He still held a new physics book in his hand. Xiaoqiang: Take this physics book today to prepare for self-study? Xiaohua: I’m here to ask you. Physics is a major new course this year. I want to hear before formal learning.