Jessica promised an article on detective for our school newspaper.
A:writing
B:to write
C:wrote
D:not writing
某物理学习小组在研究“凸透镜成像规律”时,使用的器材如图.(凸透镜的焦距是10cm,刻度尺上标记着点,相邻两点间距为10cm)
①东亚 ②西亚 ③南亚 ④中亚