阿摩線上測驗
24. The ______ piping in the engine room should be examined thoroughly to ensure that the
contaminated water will not leak out and pollute any tanks.
(A) ventilation
(B) ballast
(C) sewage
(D) distill
答案：登入後查看
統計： A(42), B(156), C(423), D(13), E(0) #2051384
統計： A(42), B(156), C(423), D(13), E(0) #2051384
