下面模式图表示农业地域类型的要素及特征,X轴为商品率,Y轴为劳动力,Z轴为机械化程度。酬中最能表示季风水田农业和商品谷物农业特征的点位是( )
A:①④
B:②④
C:①③
D:②③
阅读材料,回答问题
材料一:德国物理学家普朗克提出了量子假说,他明确指出:“研究人员的世界观将永恒决定着他的工作方向。”
材料二:恩格斯说:“推动哲学家前进的,决不像他们所想象的那样,只是纯粹的思想的力量。恰恰相反,真正推动他们前进的,主要是自然科学和工业的强大而日益迅猛的进步。”
Many students take the school bus to school every day. Parents think taking the school bus is usually safe (安全的), but sometimes it is dangerous. Some students don't keep the school bus rules. What are the school bus rules?
Arrive at the bus station early.
Wait for (等候) the school bus at the bus station.
Don't run at the bus station.
Don't walk or fight on the bus.
Don't get off (下车) the bus when it goes.
生活中处处有化学.
营养平衡、合理用药是保证人体健康和生活质量的重要途径.