英语单词表示课程“subject”和“course”,有什么区别?答:by oneself单独的,独自的,for oneself为自己,to oneself供自己用的,of oneself 自行的,自动的 The door opened of itself.71. at all, after allat all根本,全然, after all到底,毕竟 After all he is a child.72. tall, hightall常指人或动物,high常指物体 He is tall.73. fast, quicklyfast侧重于...