解决问题

在一个坐标系中，点P的坐标是(3, 4)，点Q的坐标是(6, 8)。P到Q的横坐标和纵坐标的比例是多少？In a coordinate plane, the coordinates of point P are (3, 4) and the coordinates of point Q are (6, 8). What is the ratio of the horizontal and vertical coordinates from P to Q?

• 1:2
• 3:4
• 4:5
• 2:3

在一次图书交换活动中，交换书籍的比例是3:5。如果小明有9本书，小华有多少本书？n a book exchange activity, the ratio of exchanged books is 3:5. If Xiao Ming has 9 books, how many books does Xiao Hua have?

• • 12本

• • 15本

• • 18本

• • 20本

在一次跑步比赛中，第一名和第二名的成绩比是3:2。如果第一名的时间是9分钟，第二名的时间是多少分钟？In a running competition, the ratio of the first place to the second place time is 3:2. If the first place time is 9 minutes, what is the time for the second place?

• 6 minutes
• 5 minutes
• 7 minutes
• 8 minutes

在一个长方形花园中，长和宽的比例是5:2。如果花园的长是20米，宽是多少米？In a rectangular garden, the ratio of the length to the width is 5:2. If the length of the garden is 20 meters, what is the width?

• 8 meters
• 10 meters
• 12 meters
• 6 meters

在一张地图上，1cm代表10km。如果两地之间的距离是5cm，那么实际的距离是多少km？On a map, 1 cm represents 10 km. If the distance between two places on the map is 5 cm what is the actual distance in km?

• 30 km
• 70 km
• 100 km
• 50 km