[单选] Which one is not true?（）

A . Two main areas of skill are involved in the construction of ship
B . There are distinct divisions in responsibilities between naval architects and marine engineers
C . Each ship will assume varying proportions according to its type
D . Ships can be divided into different categories from different perspective

A propeller, in order to operate efficiently, must rotate at a relatively （） speed. high。 low。 fast。 lowly。 Why a gearbox is needed in a ship driven by a medium-speed diesel engine?（） To reduce the main engine speed。 To increase the main engine speed。 To govern the main engine speed。 To fix the propeller shaft。不属于视频流数据的是（）。 RM。 MOV。 AVI。 ASF。个人客户需要提前终止时段性存款证明时（）客户本人出具证件并写出书面申请后可不提交个人时段性存款证明书原件。应提交个人时段性存款证明书原件。如确无原件，可提交个人时段性存款证明书复印件代替。除必须出具个人存款证明业务申请书、有效身份证件外，提交个人时段性存款证明书时，原件和复印件均可。下列生产单位属于生产技术准备单位（）。工具车间。检验与计量部门。研究所。工艺科。试制车间。 Which one is not true?（）

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[单选] Which one is not true?（）

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