问题
填空题
《信号维护规则》规定信号故障可分为信号事故和（）两类。
答案
参考答案：信号障碍
搜题请搜索小程序“爱下问搜题”
《信号维护规则》规定信号故障可分为信号事故和（）两类。
参考答案：信号障碍
| 用方框中单词填空。 | |
2. Does your school go on_____? 3. Here is _____birthday card. 4. _____is the man in a black jacket'? 5. _____ is her birthday? 6. Tom's birthday is August _____. 7. When is _____ Music Festival? 8. He wants to join the English speech _____. 9. Can you come to my birthday p_____? 10. The tenth month is_____. |