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12. Ship A and B are sister ships. Wind force 20 knots and 10 knots were encountered by ship A and ship B respectively. How many times of forced was sustained by ship A compared by ship B?
(A) 2 times.
(B) 3 times.
(C) 4 times.
(D) 6 times.

船舶通訊與航海英文(概要)- 107 年 - 107年第一次交通部航海人員測驗#68510

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蘇蛇蛇-航海109-3榜首大一上 (2020/04/28)

F=(1/2)*mv^2

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