题目

The city zoo bought a new kangaroo（袋鼠）from Australia. It could jump very high. The zoo keeper was worried that the kangaroo would run away. He made special 3-metre-high walls（墙）around it. But the next morning people found that the animal was playing around outside. So the zoo keeper made the height of the walls 5 meters. But the kangaroo got out again the following day. The zoo keeper felt very angry, so he made the walls as high as 10 meters, but the kangaroo still got out.How high do you think he'll make the walls? a giraffe asked the kangaroo. I don't know, said the kangaroo. 有A、B、C、D四种无色液体，它们分别是葡萄糖溶液、蔗糖溶液、淀粉液、甲酸乙酯中的一种。经实验可知：①B、C均能发生银镜反应；②A遇碘水变蓝色；③A、C、D均能发生水解反应，水解液均能发生银镜反应。试判断它们各是什么物质，并写出有关反应的化学方程式。（1）A是________，B是________，C是________，D是________。（2）写出下列反应的化学方程式：蔗糖水解、葡萄糖发生银镜反应、甲酸乙酯水解______。