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1.入射雷达波与目标表面的夹角(),称为雷达视角
单选题A. (0°~90°)~||~(45°~90°)~||~(90°~130°)~||~(130°~175°)
2.Radar is used not only to look______,but also to measure their distances away from you.
单选题A. atobscuredobjects~||~forwardsubmergedtargets~||~upexposedtargets~||~forunseenobjects
3.定位精度,PSNGOOD表示飞机定位,误差()
单选题A. 小于20nmile~||~20~30nmile~||~20~40nmile~||~大于40nmile
4.It is the responsibility of the crane operator to, at all times, be aware of the location of the __.
单选题A. load~||~hook~||~boom~||~Alloftheabove
5.The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the ______.
单选题A. Generalcommander~||~Commandergeneral~||~On-scenecommander~||~Searchcommander
6.自由陀螺仪指()
单选题A. 高速旋转的三自由度陀螺仪~||~主轴可指向空间任意方向的陀螺仪~||~不受任何外力矩作用的平衡陀螺仪~||~重心与其中心相重合的三自由度陀螺仪
7.A vessel engaged in fishing shall not impede the passage of______following a traffic lane.
单选题A. (1)~||~(1)&(2)~||~(3)~||~(4)
8.():大量微小水滴或冰晶浮游空中,常呈乳白色,使水平能见度小于1km。
单选题A. 雾~||~毛毛雨~||~霾~||~轻雾
9.在大气成分中,()是影响大气温度分布及其天气变化的主要成分。
单选题A. 氧气臭氧和惰性气体~||~氮气二氧化碳和惰性气体~||~二氧化碳臭氧和水汽~||~二氧化碳臭氧和惰性气体
10.“东风送湿,西风送干”的交换方式属于()
单选题A. 平流~||~辐射~||~湍流~||~对流
11.______20 targets can be tracked at one time.When maximum tracking capacity is reached,no further acquisitions(捕获) are possible.
单选题A. Asmanyas~||~Somanyas~||~Asmuchas~||~Asmoreas
12.风向是指风的来向,海上通常用度数表示,记整数,正北记为0°;风速以m/s为单位,记到小数一位。静风时,风速记0.0,()
单选题A. 风速记为"0"~||~风速记为"-"~||~风向记为"-"~||~风向记为"C"
13.My ship sailed______port of Shanghai,bound______Rotterdam.
单选题A. from,for~||~for,on~||~on,at~||~at,from
14.It is dangerous for vessels without the use of radar______the estuary(河口).
单选题A. toget~||~toapproach~||~toproceed~||~toclose
15.从地面到大气上界将大气层分为5层,依次为()
单选题A. 对流层平流层中间层热层散逸层~||~对流层平流层中间层散逸层热层~||~对流层散逸层中间层热层平流层~||~对流层等温层中间层热层散逸层
16.冬季,长江口以北海域盛行偏北季风,()多为西北浪和北向浪。
单选题A. 渤海黄海东海南海~||~东海南海~||~黄海东海~||~渤海黄海
17.浓雾警报,则海面能见度为()。
单选题A. 05~5nmile~||~小于05nmile~||~小于2nmile~||~2~5nmile
18.一般地面反气旋中心气压值在()
单选题A. 1000~1020hPa之间,目前的最高记录是10533hPa~||~1040~1060hPa之间,目前的最高记录是10833hPa~||~1020~1040hPa之间,目前的最高记录是10833hPa~||~一般在980~1000hPa之间,目前的最高记录是10333hPa
19.水平气压梯度力与()
单选题A. 空气密度成反比,与气压梯度成正比~||~与空气密度成正比,水平气压梯度成正比~||~与空气密度成反比,水平气压梯度成反比~||~与空气密度成正比,水平气压梯度成反比
20.The correct method of switching off a marine radar is to turn power switch to ____ position fisrt, then to ______ position.
单选题A. off/standby~||~standby/off~||~standby/close~||~close/standby
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