21. Single turn is an effective manoeuvring method for the ______ situation.
(A) person overboard
(B) shallow water
(C) heavy weather
(D) poor visibility

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統計: A(600), B(29), C(28), D(40), E(0) #2883500

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21. 單轉彎是一種有效的機動方法,適用...
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