Emergency warning can be electronic or manual and are designed to alert members of the public and other road users by sound that an emergency vehicle is approaching.
Alights
Bbeacons
Cmonitors
Dsirens正確答案
答案與詳解
為什麼答案是 D
sirens 是「警笛」，透過聲音警示用路人緊急車輛接近，完全符合 by sound 的描述。
考點：視覺警示考點：警示燈考點：干擾選項考點：聲音警示
載入中…
