遇天气恶劣，信号机显示距离不足200m时，应立即报告列车调度员发布命令，改按天气恶劣难以辨认信号的办法行车。
参考答案：对
简述轮虫的主要特征。
In our philosophy of life we believe that in most cases what is sauce for the ______ is sauce for the gander.
A. chicken B. pigs C. ducks D. goose
