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针对以物理途径访问系统的人，如何保护磁盘文件不会被窃取？（考虑数据加密）

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A twin-screw vessel with a single rudder is making headway. The engines are full speed ahead. There is no wind or current. Which statement is FALSE? （）

A. If one screw is stopped，the ship will turn toward the side of the stopped screw
B. The principal force which turns the ship is set up by the wake against the forward side of the rudder
C. Turning response by use of the rudder only is greater than on a single-screw vessel
D. With the rudder amidships，the ship will steer a fairly steady course

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针对以物理途径访问系统的人，如何保护磁盘文件不会被窃取？（考虑数据加密）

A twin-screw vessel with a single rudder is making headway. The engines are full speed ahead. There is no wind or current. Which statement is FALSE? （）

在基因的置换突变中同类碱基（嘧啶与嘧啶、嘌呤与嘌呤）的替换称为（）。不同类型碱基（嘧啶与嘌呤）间的替换称为（）。

添加减水剂的目的有什么？

为什么要进行项目的范围管理？项目范围管理的过程是什么？