小林沉迷于玩手机游戏,致使其眼球的某一结构曲度过大且不易恢复原大小而患上近视.这一结构是图中的( )
A:1
B:2
C:3
D:4
For all these years, I have been working for others. I'm hoping I'll ________my own business someday.
某班学生为探究绿色植物的光合作用,设计如下实验装置甲、乙、丙,请据图作答: