植物光合作用的原料是（　　）

一细杆与水桶相连，水桶中装有水，水桶与细杆一起在竖直平面内做圆周运动，如图所示，水的质量m=0.5kg，水的重心到转轴的距离l=50cm．（取g=10m/s²，不计空气阻力）

    Tony's father, Mr. Baker, lost his job last year. But now, he has his own fast food shop. It's not very big, but it sells a lot of food, drinks, desserts and soup. Many people like the hamburgers there. Today is Sunday. Tony got up very early. After breakfast, he went to his father's shop and made a line graph（线状图表） for him to show the number of hamburgers he sold. Now please look at the graph and today's menu to choose the best answer.

“一战”后，在帝国主义召开的一次分赃会议上，规定德国的海外殖民地由英、法、日 等国瓜分，取消义务兵役制，陆军总数不得超过 10 万人的条约是(     )