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1.气压观测应在（）
单选题A. 正点前15min进行~||~接近正点进行~||~正点前10min进行~||~正点前30min进行
2.12HOURS GALE WARNING VALID FROM 1103990700 UTC. From this phrase, the waring is expected to be valid from ______.
单选题A. 0700UTCMAR11，1999~||~0700UTCNOV03，1999~||~0700UTC，1103UTC，1999~||~NOVMAR19990700UTC
3.（），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
4.In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect？______.
单选题A. Southtowest~||~Southtoeast~||~Northtowest~||~Northtoeast
5.在船底装有发射超声波的发射换能器A和接收超声波的接收换能器B，A与B之间的距离为S，称为基线。发射换能器A以间歇方式向水下发射（）
单选题A. 音频声波连续波~||~连续超声波~||~频率超声波脉冲~||~音频声波脉冲
6.我国国家气象局规定，由于冷空气侵袭，我国中央气象台规定24h内降温幅度和日最低气温分别（）时，发布寒潮警报。
单选题A. 10℃以上，5℃以上~||~10℃以下，5℃以上~||~10℃以上，5℃以下~||~10℃以下，5℃以下
7.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
8.MODERATE WAVES, TAKING A MORE PRONOUNCED LONG FORM;MANY WHITE HORSES ARE FORMED. This sea condition is likely to be termed ______.
单选题A. neargale~||~moderatebreeze~||~freshbreeze~||~strongbreeze
9.低层大气中，特别是在近地面附近，风向与等压线斜交，南半球是（）的气流系统
单选题A. 低层顺时针辐散~||~低层逆时针辐合~||~低层顺时针辐合~||~低层逆时针辐散
10.影响海面能见度的因子除雾外，还有（）
单选题A. 风霾雨雪和低云等~||~沙尘暴霾雨雪和中云等~||~沙尘暴霾雨雪和高云等~||~沙尘暴霾雨雪和低云等
11.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
12.The circular steel structure installed around the propeller of a towboat is the______．
单选题A. nozzle~||~shroud~||~strut~||~Hood
13.PARACEL:N TO NE 6 AND UP TO 10 IN NA. 4000 M IN FRQ SQUALLY SHWRS AND TS. SEA 2 M AND UP TO 8-9 IN NA. SWELL E TO NE 4-5. FROM the above broadcast, the visibility will be ______.
单选题A. good~||~verygood~||~poor~||~moderate
14.目标的位置(距离和方位)数据在捕获后即可显示，目标的CPA在（）左右(性能标准规定在1min之内)才能显示。
单选题A. 10s~||~20s~||~30s~||~40s
15.Radar is used not only to look______，but also to measure their distances away from you．
单选题A. atobscuredobjects~||~forwardsubmergedtargets~||~upexposedtargets~||~forunseenobjects
16.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
17.南太平洋的西风漂流日流速达10nmile，沿40°～50°S纬度圈流动，属于（）
单选题A. 暖流~||~冷流~||~中性流~||~补偿流
18.Fishing stake, the position of which frequently _____, exist in the area covered by this chart.
单选题A. removed~||~altered~||~corrected~||~Converted
19.当夏季风盛行时，则表现为（）的气候特征。
单选题A. 低温潮湿和少雨~||~高温干燥和少雨~||~高温潮湿和多雨~||~低温潮湿和多雨
20.Get searchlight______for transiting the canal at night．
单选题A. on~||~already~||~Almost~||~ready
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