下一楼›：思维导图是开发大脑的好东西。我一定要好好学习。(炫智)
‹上一楼：vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv(心以死)