阿摩線上測驗
25. Vessels shall be deemed to be in ______ of one another only when one can be observed visually from the other.
(A) sight
(B) perception
(C) illusion
(D) apparition
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統計： A(111), B(20), C(12), D(12), E(0) #3833739
統計： A(111), B(20), C(12), D(12), E(0) #3833739
