My favourite teacher is our English teacher. She is a very beautiful woman. She is thirty-six years old. She has a round face, black hair, big eyes, a small nose and a small mouth. She is very kind to us. She often plays games with us. S
从《口技》中找出相应的时间词语:
①表示突然发生:
②表示同时发生:
③表示相继发生:
④表示在特定时间内发生:
⑤表示过了很短时间就发生:
有关DNA、基因和染色体的叙述,错误的是( )
下图是唐代画家阎立本的《步辇图》,反映的是唐朝皇帝接见吐蕃使臣禄东赞的场景。下列事件与之直接有关的是( )
分解因式:4+12(x﹣y)+9(x﹣y)2=____。