20. A: What is the latest ice information? B: Ice warning. ______ located in position 61 degrees 16 minutes N, 003 degrees 07 minutes
E. Question: What is(are) considered to be a danger to navigation?
(A) Tropical storm
(B) Dangerous derelict
(C) Submerged rocks
(D) Icebergs
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統計: A(11), B(30), C(32), D(550), E(18) #2999694
統計: A(11), B(30), C(32), D(550), E(18) #2999694