44. 開關符號「5fbf5d238ec8b.jpg 」,其動作狀態為
(A)OFF-ON-OFF
(B)ON-OFF-ON
(C)ON-OFF-OFF
(D)ON- ON-OFF。

答案:登入後查看
統計: A(1), B(15), C(0), D(0), E(0) #2533357