阿摩線上測驗
55 When a vessel is in any doubt as to whether such a head-on situation exists, she shall assume that it _____
and act accordingly.
(A)does exist
(B)doesn’t exist
(C)exist
(D)existed
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統計： A(5), B(7), C(5), D(3), E(0) #3221113
統計： A(5), B(7), C(5), D(3), E(0) #3221113
