在站内线路上施工时,道岔只能通往施工地点,在施工地点两端各()m处设置移动停车信号牌防护。
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Treatment for acute diseases usually involves medication of antibiotics, have direct effects on inflammation.
A. which
B. what
C. that
D. whether
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
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