如图是光线通过凹透镜后的折射光线,作出入射光线.
解:延长线过另一侧焦点的光线经凹透镜折射后将平行于主光轴.如图所示:
①设计 ②宣传推广 ③运行维护 ④策划 ⑤制作
下列四幅漫画中寓意“社会公平”的是( )
Mr. Black, as well as his wife and children, ________ invited to the dinner party last night.