問題詳情

20. What object should be placed on the floor in front of emergency generator switchboard?
(A) Wooden board.
(B) Rubber mat.
(C) Carpet.
(D) Metallic step.

參考答案

答案：B
難度：非常簡單1
統計：A(0),B(2),C(0),D(0),E(0)