要点提示1)Where did you go over the summer holiday? 2)Who did you go with? 3)How did you go there? 4)What did you do there? 5)How did you feel?
实数a、b在数轴上的位置如图,化简 a2-b2-a-b2为( )
下列关于铜电极的叙述正确的是
下列各项中,不属于宋辽之间、宋夏之间“和议”共同点的是( )
血液经过下列器官后,血液中的代谢废物会减少的是 ( )