Dolly is a middle school girl. Her parents want to take her to Ice and Snow Festival. How much will they pay for the tickets?
生活中有许多规定,如“不准带手机进考场”、“严禁酒后驾车”、“严禁携带易燃易爆物品上车”等,每个公民都必须遵守这些规定,因为( )