第八章测试
1.The most commonly used standard for defining the strength of ocean waves is of ocean waves.(定义海浪强弱最常用的标准是海浪的)( )。
A:Amplitude (波幅 ) B:Peak period(波峰周期) C:Wave height (波高) D:Cross-zero cycle (跨零周期)
答案:C
2.The following is correct for the differential link D : .(下列对微分环节D说法正确的是)( )。
A:Increase system overshoot (增加系统超调量) B:Can shorten the excessive time (能缩短过度时间) C:The effect of reducing noise interference (对噪声干扰有减少的作用) D:Reducing adjustment time (减少调节时间) 3.The main function of the ship load line mark is to determine what .(船舶载重线标志的主要作用是为确定什么。)( )
A:Load capacity(载重量) B:Tonnage of the ship(船舶的吨位) C:Ship freeboard(船舶干舷) D:Draft depth of the ship (船舶的吃水深度) 4.The following waves and head waves mainly affect ship     .(顺浪和顶浪主要影响船的     )( )
A:Vertical motion (垂向运动) B:Neither affects(都不影响) C:Longitudinal movement (纵向运动) D:Lateral motion(横向运动) 5.The main cause of the wave is        .(海浪产生的主要原因是       。)( )
A:Currents (海流) B:Sea breeze (海风) C:Humidity (湿度) D:Temperature(温度)

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