常用的铁路运输安全设计技术方法不包括( )。
A．强化运输设备的安全性
B．屏护
C．隔离
D．闭锁
参考答案：B
根据句意及首字母提示写出单词。
1. We can borrow books from our school l__________.
2. Beijing is the c__________ city of China.
3. I'm very tired. I want to have a r__________.
4. This shirt is just r__________ for the boy. He likes it very much.
5. Mary is in Class 3, and Linda is in Class 4. They are in d__________ classes.
何时禁止使用防雨剂系统？（）
A.双发关车时
B.在地面速度低于80KT时
C.高度层大于FL150
