問題詳情
9.The required number of dual ___________ nozzles are on board, and each fire hose togetherwith any neseccary fittings and tools kept ready for use in a conspicuous position near water service hydrants or connections.
(A)usage
(B)alternatives
(C)selection
(D)purpose
參考答案
答案：D
難度：適中0.428571
統計：A(0),B(2),C(0),D(3),E(0)