问题
判断题
NO.7信令系统的优点主要有信令传递速度快、信令容量大、灵活性大、
答案
参考答案:对
NO.7信令系统的优点主要有信令传递速度快、信令容量大、灵活性大、
参考答案:对
If you are cycling in foreign countries, you will need to know what these traffic signs and signals mean.
小题1:What are cyclists required to do when they see the sign? ![]()
![]() ![]() 小题3:What should cyclists do when they see the sign? ![]()
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