A: 开啤酒瓶盖的开瓶器
B: 天平
C: 钓鱼者手中的鱼杆
D: 撬钉子的钉锤
下面各图形中( )不能通过图①平移或旋转得到。
①
我国的人口地理分界线是( )
Listen, the boys ______ with each other over there. Please go and see what has happened.