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1.陀罗方位是指()
单选题A. 真北和航向线之间的夹角~||~真北和方位线之间的夹角~||~陀罗北和航向线之间的夹角~||~陀罗北和方位线之间的夹角
2.在海平面上大气压为1013hpa,高度每升高1000英尺(304.8m),降低()
单选题A. 35hpa~||~36hpa~||~37hpa~||~38hpa
3.The circular steel structure installed around the propeller of a towboat is the______.
单选题A. nozzle~||~shroud~||~strut~||~Hood
4.If a ship will call at four ports for discharging, i.e.A.B.C and D consecutively, the cargo for ______ must generally be loaded first.
单选题A. PortA~||~PortB~||~PortC~||~PortD
5.(),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
6.下列正确的说法是()
单选题A. 毛毛雨落在水面有波纹,落在甲板上无湿斑~||~毛毛雨落在水面无波纹,落在甲板上有湿斑~||~小雨落在水面会激起波纹或水花,落在甲板上可留下湿斑~||~小雨落在水面无波纹,落在甲板上可留下湿斑
7.间接回波的方位通常在()
单选题A. 船首标志线上~||~船尾线方向~||~盲区内~||~阴影扇形内
8.气压梯度的大小取决于等压线的疏密程度。等压线越密集,()
单选题A. 水平气压梯度小~||~水平气压梯度大~||~垂直气压梯度小~||~垂直气压梯度大
9.船舶在海上转向后,船上罗经会有()误差。
单选题A. 速度和冲击~||~速度和纬度~||~冲击和摇摆~||~纬度和冲
10.(),所以露点也直接反映空气中水汽含量多少的物理量。
单选题A. 露点越低,水汽含量越多~||~露点越低,水汽含量越少~||~露点高低不能反映水汽含量的多少~||~露点温度越高,水汽越不容易凝结
11.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
12.锋面雾最常形成于锢囚气旋中和气旋中暖锋接近中心的部分。多在()和暖锋前产生,有时缓行冷锋后也形成。
单选题A. 冷锋前~||~冷锋后~||~暖锋后~||~锢囚锋两侧
13.()地区日较差比潮湿地区的大。
单选题A. 沙漠~||~大洋~||~沿岸~||~内陆
14.Fishing stake, the position of which frequently _____, exist in the area covered by this chart.
单选题A. removed~||~altered~||~corrected~||~Converted
15.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
16.All the crewmembers shall be at the station as required by the muster list when in firefighting drill______minutes after hearing the alarm,and the duty engineer shall be able to make the fire pumps available with______minutes.
单选题A. 2/5~||~2/3~||~3/2~||~2/2
17.Radar is used not only to look______,but also to measure their distances away from you.
单选题A. atobscuredobjects~||~forwardsubmergedtargets~||~upexposedtargets~||~forunseenobjects
18.On no account can they cut it______it be fouled.
单选题A. Do~||~would~||~shall~||~should
19.Get searchlight______for transiting the canal at night.
单选题A. on~||~already~||~Almost~||~ready
20.灯塔是雷达良好的目标,雷达的发现距离一般在()之外。
单选题A. 5nmile~||~6nmile~||~7nmile~||~6nmile
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