解:原式= (x−1)2x(x
下列各组资源,均为可再生资源的是( )
使用光学显微镜观察物体时,调节视野亮度要用到的部件是( )
One day Eddie and Hobo looked at the ____. Eddie thought he saw a____but Hobo thought it was a ____. Because Hobo saw one ____. Eddie thought there were many bright ____and it was too____, so it couldn't be a plane.