A:have asked
B:haven’t asked
C:have been asked
D:haven’t been asked
①针孔照相机内所成的像;②平面镜中所成的像;③放大镜看到的物体的像:
④幻灯机屏幕上所成的像;⑤照相机中所成的像.
未成年人避免受侵害的前提是( )