— Of course. The main character Simba always tried to face any danger in his life.
A:educational something
B:educational anything
C:everything educational
D:anything educational
——Where is the new student ?
——America.
如图所示,在“探究凸透镜成像规律”的实验中,凸透镜位置保持不变,凸透镜的焦距为10cm.