While moving ahead，a twin-screw ship has an advantage over a single-screw ship because （）.<br>A:correct trim will be obtained more easily<br>B:drag effect will be cancelled out<br>C:side forces will be eliminated<br>D:speed will be increased

While moving ahead，a twin-screw ship has an advantage over a single-screw ship because （）.
A:correct trim will be obtained more easily
B:drag effect will be cancelled out
C:side forces will be eliminated
D:speed will be increased

出自：海船船员证

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