如图1所示，桌面上放有三个相同的玻璃杯，分别装有质量相同的三种液体甲、乙、丙，它们的质量与体积的关系如图2所示，三个杯子从左至右依次装的液体种类是（　　）

加尔各答地区的海拔范围为1.5～9m，广州地区的平均海拔为11 m。结合下列材料，回答以下问题。

材料一　下表为印度加尔各答(22°34′N,88°22′F)气候资料统计表。

材料二　下表为我国广州(23.1°N,113.2°E)气候资料统计表。

如图表示食物通过人体消化道时，淀粉、脂肪和蛋白质化学性消化的程度，字母代表组成消化道的各器官．请根据该图回答问题

When I was a little girl, I lived with my grandparents in a small village(村庄).The life there was 1, and I liked it very much. I had many friends and I liked playing with them 2 . After rainy days, there was much 3 in the river(河) near our house. I often went there to get4with my friends. I had 5fun living there.
Now I live in a big city. I study in a school, but I6my life here. It’s too busy and it often makes me very7. Now the most interesting thing for me is to go to my grandparents’ home to8my vacation. Every time I can’t  9to go there. I  10  a quiet life. I hope to live in a village when I’m older. 

下列能够聚合成DNA分子的物质是