A:铁、镁
B:铁、锌
C:锌、铁
D:锌、镁
— You spend too much time in front of the computer. You'd better away from it.
①她面前不是只有一堵又厚又冷的墙吗?
②桌上不是铺着雪白的台布吗?
(按从左到右的顺序填写)
有关板块构造学说的叙述正确的是( )