問題詳情

20.「Obstruction, which has been swept by wire to the depth shown」- it will be marked in the chartas：
(A) 

Obstn
(B) 

Obstn
(C) 

Obstn
(D)

 Wk

參考答案

答案：C
難度：適中0.693548
統計：A(6),B(10),C(43),D(3),E(0)