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问题:

[单选] In securing deck loads for an ocean tow,drill pipe should be().

A . galvanized to protect against corrosion
B . held in place with heavy materials such as spare pendant wire
C . limited to no more than five courses high
D . provided with bulwarks at both ends of their bay

In a fixed displacement axial piston hydraulic motor, the speed is varied by() regulating the ratio between torque and speed via the torque limiter at the motor。 directing the motor output flow through a bypass line。 maintaining a constant flow and pressure input。 controlling the input flow rate。 取N为奇数,对某一参数连续采样N次,然后把N次采样的值从小到大或从大到小排列,再取其中间位置上的值作为本次采样值的方法是()。 中值滤波。 平均值滤波。 低通滤波。 程序判断滤波。 发电厂、变电站发生母线失电时应该如何处置? 变电站主变过载时应如何消除过载? BMW一般采用哪种转向器() 齿轮齿条式。 循环球式。 蜗杆齿扇式。 伞形齿轮式。 In securing deck loads for an ocean tow,drill pipe should be().
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