题目

The water tap was leaking (漏水) again, and the noise was driving Cassie crazy. Cassie looked at her watch. It was nearly nine o’clock. She climbed out of bed and stood on a chair by the shelf. Her mother’s Mr. Fix-It Book was on the top shelf. Cassie stepped down quietly. She read the book quickly until she found the page she was looking for, and then began to read carefully. Next, Cassie opened a box in the kitchen and picked out the tools she needed — a hammer, a wrench, and several small things. It was no easy job for her to do the repair, and she tried several times. Finally, th为了防控冬季呼吸道疾病，某校积极进行校园环境消毒工作，购买了 甲、乙两种消毒液共80瓶，其中甲种每瓶6元，乙种每瓶8元，如果购买这两种消毒液共花去500元，求甲、乙两种消毒液各购买了多少瓶？