問題詳情

31. A buoy composed of a tall central structure mounted on a broad flat base calls _____.
(A) station buoy
(B) spherical buoy
(C) discrepancy buoy
(D) pillar buoy

參考答案

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)