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1.在平静的大洋航行时,雷达只用于避碰观测,采用()是最方便的选择。
单选题A. H-up~||~N-up~||~C-up~||~真方位TB
2.(),以数字表示、单位为km。
单选题A. 温度~||~降水量~||~水平能见度~||~现在天气现象
3.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
4.______get your engine ready before six tomorrow morning.
单选题A. You’dbetter~||~Youwouldbetter~||~Youatleast~||~Youatmost
5.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
6.For working details______Admiralty list of Radio Signal
单选题A. refer~||~see~||~Look~||~watch
7.罗经柜通常由()等非磁性材料制成,主要用来支撑罗盆和安放消除的自差校正器。
单选题A. 铁和铜~||~铜铝木~||~钢和铁~||~铁镍合金
8.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"
9.():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
10.(),如辽阔的海洋、无垠的沙漠、冰雪覆盖的大陆和极区等都可成为气团形成的源地。
单选题A. 大范围物理性质不均匀的下垫面~||~低层存在逆温~||~对流层风的垂直切变要小~||~具备大范围性质比较均匀的下垫面
11.How many GMDSS operators are needed/required on board according to the provisions of the International Convention for the Safety of Life at Sea,1974?______.
单选题A. 4operators~||~3operators~||~2operators~||~1operator
12.极地大陆气团(Polar continental air mass):(),空气层结稳定。
单选题A. 干燥低温天气晴朗~||~低温潮湿多阴天~||~干燥低温气层不稳定~||~干燥低温常阴天
13.太平洋的西风漂流()越过南太平洋时,在南美西岸有一分支北上形成秘鲁海流,其流速约为0.5kn,属于冷流。
单选题A. 自北向南~||~自南向北~||~自东向西~||~自西向东
14.The approach to the roads and harbor from the______entails no difficulty.
单选题A. eastern~||~easterly~||~eastward~||~Eastwards
15.东海和南海盛行东北季风,以东北浪居多,()东北浪占优势。
单选题A. 渤海海峡~||~北部湾~||~长江口~||~台湾海峡
16.船舶恒向恒速运动时,陀螺罗经主轴的稳定位置与航速为零时主轴稳定位置二者在方位上的夹角称为()
单选题A. 速度误差~||~摇摆误差~||~冲击误差~||~纬度误差
17.使锋面向冷空气一侧倾斜的主要原因是()
单选题A. 气压梯度力作用~||~地球自转运动的作用~||~水平方向的空气流动~||~冷暖气团相互抬挤
18.Many of the lights on this coast are placed so high as to be frequently obscured by______.
单选题A. power~||~tower~||~cover~||~lowclouds
19.My ship sailed______port of Shanghai,bound______Rotterdam.
单选题A. from,for~||~for,on~||~on,at~||~at,from
20.A vessel on the high seas that is not under command shall display which of the following day signals? ______
单选题A. Twoblackballs~||~Threeblackballs~||~Tworedballs~||~Threeredballs
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