21. You are sailing in heavy weather and the wind velocity is 36 knots. What Beaufort scale of
wind do you encounter?
(A) 9
(B) 8
(C) 7
(D) 6
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統計: A(84), B(205), C(51), D(40), E(0) #3306283
統計: A(84), B(205), C(51), D(40), E(0) #3306283