必考题
如图所示的标识，红圈中的黑色数字代表什么？What does the black number in the red circle on the signs represent?
最低时速80公里Minimum speed of 80 kilometers per hour
晴好天气、路况良好时，最高行驶速度80公里/小时When the weather is clear and the road conditions are good, the maximum driving speed is 80 kilometers per hour
请使用80公里的时速超车Please use a speed of 80 kilometers per hour to overtake.