419 Which of the following are extremely dangerous areas, and lingering at these areas should be avoided?
(A) Roads which have small rocks falling
(B) Rockfall catchment fences or disfigured and twisted road railings
(C) All of the above.
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統計: A(0), B(0), C(5), D(0), E(0) #2214880
統計: A(0), B(0), C(5), D(0), E(0) #2214880