阿摩線上測驗
25. A steel and hinged ______ is often used to protect the porthole glass in the heavy
weather. It can be mechanically secured by screws and nuts.
(A) scupper
(B) deadlight
(C) inlet
(D) scuttle
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統計： A(171), B(254), C(81), D(159), E(0) #3155831
統計： A(171), B(254), C(81), D(159), E(0) #3155831
