“掉牌未复归”的光字牌装在中央信号盘上，它与（）装置由同一组熔断器3RD和4RD供电。
A.预告信号
B.事故信号
C.音响信号
D.闪光信号
参考答案：A
Fill in the blanks. Complete the dialogua. 补全对话。
a.you b.yours c.mine d.my e.she f.him g.we
1. Hello! name is Li Lei.
2. Do often go to school?
3. The bicycle under the tree is .
4. My book is here, is under the table.
5. usually go to school together.
6. is a girl.
7. Please give a pen.
民主评议领导体制和工作机制是什么？
