LKJ与平面调车灯显设备配合使用进行调车作业时，在运行中接收到“三车”信号以后，列车走行（）米后，限速变为6km/h。
参考答案：20
根据句意和首字母提示完成单词。
1. Beijing is the c of China.
2. Lu Xun was one of the greatest w .
3. France is a E country.
4. The boy doesn't know which t to choose. There are many things for him to write.
5. We use a c language in our class.
_____ drive too fast .We have enough（足够的）time to get there.
A. Not B. Don’t C. doesn’t
