—— 请按键盘 空白键 开始游戏 ——

No hay que tener miedo a perderse, sino a no encontrarse nunca.
Technology is the core competitiveness. We must continuously introduce and develop new technologies to improve product quality and production efficiency.
学习计量经济学的最佳方法是通过实践——处理真实的数据和真实的问题。