41 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.
(A)lights
(B)beacons
(C)monitors
(D)sirens

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統計： A(61), B(33), C(31), D(175), E(0) #858596

詳解 (共 5 筆)

#2159595
Emergency warning si...
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#2673541
beacons燈塔 指路燈 monitor監測
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#3787248

(A)light 光/光亮/光線/發光體/燈/電燈 (B)beacon 信標燈/燈塔/烽火
(C)monitor 監督員/核查員/監控器/監測器 (D)sirens 警報器/汽笛/賽蓮(海妖)  Emergency緊急情況/不測事件/突發事件 vehicle交通工具/車輛/機動車/方法/手段/媒介

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#5094155

Emergency warning (sirens) 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.

緊急警報警報器可以是電子的或手動的，旨在通過聲音提醒公眾和其他道路使用者有緊急車輛接近。

sirens警報器

electronic電子的 manual手動的 

(A)lights 燈
(B)beacons 信標
(C)monitors 監視器 

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#1558257

Siren 警報器；迷人的女人

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