距进站信号机少于800m的站外施工时,当警冲标距离施工地点小于800m时,按()设置移动减速信号牌。
A. 警冲标位置
B. 800m
C. 进站信号机位置
D. 不需要设置
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Pneumonia is a common illnessoccurs in all age groups.
A. where
B. what
C. that
D. whether
Appendicitis is a condition characterized by inflammation of the appendix,has been recognized as one of the most common causes of severe acute abdominal pain.
A. it
B. what
C. that
D. which
减速防护地段终端信号牌表示限速区段到此为止。
A. 对
B. 错
凡线间距离不足规定时,则应设置矮型的移动减速信号牌。
A. 对
B. 错