問題詳情
41 Emergency warning _____ can be electronic or manual and are designed to alert members of the public and otherroad users by sound that an emergency vehicle is approaching.
(A)lights
(B)beacons
(C)monitors
(D)sirens
參考答案
答案：D
難度：困難0.397727
統計：A(25),B(18),C(10),D(35),E(0)
用户評論
【張仲瑋】評論
beacons燈塔 指路燈monitor監測