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traffic.qpf
- 设计一个主干道和支干道十字路口的交通灯控制电路,主干道绿灯亮、支干道红灯亮,并且主干道绿灯亮的时间不得少于60秒。-Design a main road and branch roads intersection traffic lights control circuit, the main road the green light, branch roads red light, green light and the main road is not less than 60 second