鱼必须生活中水中,离开一段时间就会死亡,这说明( )
血液流经下列哪个部位后,静脉血变为动脉血( )
请用一百来字概括一下蔺相如完璧归赵的故事,并用上“无价之宝、为难、理屈、完璧归赵”等词。
① Are these all ours? ____ A. It is Zhang Peng's.
② Whose is it? ____ B. Yes,it is.
③ Is this yours?____ C. Yes. they are.