“三个必训”制度指的是（）
A、上岗和首任必训
B、职务和警衔晋升必训
C、工作岗位调整必训
D、基层和一线民警每年实战必训
参考答案：A, B, D
请你根据你自己的实际情况回答下列问题。
1. When are you going to get up tomorrow morning?
2. What are you going to do tonight?
3. Where are you going to play sports tomorrow?
4. Are you going to clean your room this weekend？
5. Is your mother going shopping this Sunday?
光缆三线保护，两边应各留长（）cm。
A、100
B、200
C、300
D、400
