⑴ ____ A. come to the kitchen
⑵ ____ B. buy some ice cream
⑶ ____ C. arrive at the party
⑷ ____ D. bring her home
⑸ ____ E. go to the shop
“世界屋脊”之称的大高原是( )
把凸透镜正对太阳光,可在距凸透镜10cm处得到一个最小最亮的光斑。若用此透镜来观察邮票上较小的图案,则邮票到透镜的距离应( )