In which liquid do roses last the longest?

Roses have the longest preservation time in Sprite. Students from Hangzhou Bay Junior High School, such as Jin, Lu Xinru, Zhou, Lu Yunan, Wang Hao, etc., conducted research on flower preservation under the guidance of their teachers. Milk, salt, sugar, cola, sprite and fruit juice were added to the solution of flower arrangement, and each substance was prepared according to different concentrations for experiments. After 15 days of practical research, the conclusion is drawn. Why do the roses in Sprite Group keep fresh for a long time? Their research shows that sodium chloride in Sprite can disinfect the cut of flower branches, while sucrose provides sufficient nutrition for roses. The research topic of students such as Xu Jingyi, Gong Yuchang and Fu Bin in Shengshan Town Junior Middle School is "Exploring the current situation of local rural electricity consumption". Based on the investigation of some families in Zhenqian Village and Dawan Village of this town, it is found that the unreasonable use of electricity by rural families mainly includes: turning off the lights during the day, waiting for the TV for a long time, turning on the air conditioner when the weather is not very hot, leaving the computer unattended and the washing machine on. They use their own survey results to advocate the concept of environmental protection, energy saving and low carbon life. Close contact with celebrities of Cixi, such as Yao Yao, Sun Yu, Shen Qian and other students from Xincheng junior high school, look for information related to their own topics from the Internet, and visit the former residence of celebrities of Cixi in groups to find insiders.